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FLORIDA
STATE BOARD OF CONSERVATION
S. E. Rice, Supervisor of Conservation
FLORIDA GEOLOGICAL SURVEY
Herman Gunter, Director







REPORT OF. INVESTIGATIONS

No. 3


THE DOLOhITIC LIIM`ESTONES


OF FLORIDA


By R..H. Hopkins












Prepared and Published by
Florida Geological Survey
Tallahassee


December 1.942




A-o tq

6S6


.' :i

















THE DOLOMITIC LIMESTONE OF FLORIDA
Y. R. H. HOPKINS


SHADICG SHOWS GE?-RAC AREAS
P~OS-PECTED: FOR DOLOMITIC


0 20 40
SCALE ---- -- MILES


l'H-ICH WERE
LIMESTONE


0?'
0
^^w0
.o
,,p "


7, '


-


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---- i
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CONTENTS
Page


Introduction ....... .... .... .. .. .... ............. 1
Acknowledgements ... ....... ..... ...... .. .... ....................... 2
Terminology ............... ............. .. .. ......................... 3
Origin and mode of occurronco of floride dolomitic limestones ........... 4
Uses ................................... ....... ..... .... .. 7
Uses for which chemical proportions aro important ......................
Agricultural limestone ........ ..,,,...*...... *...**..*.... 8
Carbon dioxide ... ............... ........ .......................... 9
Glass ......... . . . .. . .. . .
Paper ....... ........ .................. ...... ....... .............. .. 9
Rock,wool ....................................... ............ ....... 11
Magnesium ........ .............................. .................. 12
Uses for which physical properties are important ....................... 12
Building stone ............ ............ ........................... 12
Crushed stone ............ ................... ................... 13
Prospecting for dolomitic limastonos in Florida .................... ... 13
Taylor County ................. ........... ... ..... ....... ........... 13
Map of Taylor County showing dolomitic areas and locations
of test wolls .................................................... 14
Logs cf test holes and chemical analysis of samples ................ 21
Dixie,County ......................................................... 20
Mcp of Dixio County showing dolomitic areas and locPtions
of test wells ....................................... .... ... 38
Logs of tost hols and chemical analyses of samples ................ 40
Levy County 0 39
Lovy County ....................................................... 39
Map of Levy County showing dolomitic areas and locations
of test wo11s ................................................... 44
Ln,-s of test holes and ch3miccl hnalysos of srnples ................ 49
Citrus Ccunty ............... ......... ........ ... 62
Map of Citrus County showing drlomitic areas and locations
of test wells ......................................... 63
Leg of test holes and chcmicRa nnalys.s of samples ............... 65
PPscc County ...... ,........... ,..... ......................... 71
Map of Paiscc County showing dlo:nitic areas and lcc-ticns
of test wells ...... .................... ................... ... 70
Legs of test holes and chomic l analysos of samples ............... 72
MWnatco County .......... ................. ... .... ..'.... 76
Map cf Ucnnteeo County sh wing dolomitic areas and locations
of t Ost wells ................ ............. ......... .... ...... 83
Legs cf tost hcles and chemical analyses of samples .... ........... 84
Snrasct. County .......... ..................... ..... .... ., 92
Map cf Sarnsota C-unty showing delomitic aran and locations.
cf test wells ......................................... ..... 96
Logs of test hclos and chonicrl :nalys.s of samples ............... 97
Miscollanoeus prospecting ............................ ..... ....... 102
Sarasota County ...... ...... ........................... ..... ... 102
Pascc C unty ...... .................................................. 103
Bibliography ........................ ..... ................. 105








I NT R 0 D U C T I 0 N


Very little has been written about the dolomitic limestone resources

of Florida. ,Dolomitic boulders and -outcrops have doubtless been observed

for many years, but have been. included in the general term limestone. The

first recognition of rock of this nature was probably in Levy County, where

prospecting was. done about ten years ago by R, M. King in the vicinity-of

Lebanon near the present pits of tho Dixie Lime Products Company of Ocala.

As a result of this work, a plant for the manufacture of agricultural lime-

stone was built. Since. that time tho Golden Dolomite Company of Orlando,

and the Gulf Dolomite Company of Haines City, have constructedi-plants at

Red Level in Citrus County,, and the Florida Dolomite Company of Sarasota',

in Sarasota County.. All of these plants are producing dolomitic limestone

for agricultural purposes.. Dolomitic.limestone has been mined elsewhere on

a small scale, especially in Manatee County. Most of-.this rock has;been used

for aggregate and rough building stone.

With the outbreak of the present war the demand for data on the dolo-

mite resources of the nation greatly increased. This was because of the fact'

that processes had been developed and were being perfected for the extraction

of magnesium from dolomite. .This demand for data on dolomites prompted the

investigation covered by this report. Although no dolomite deposits in the

strict sense of the term have been found in,the course of this study it is

felt that important economic data, particularly for post war developments,

have been brought to light.

SIt was not possible, nor intended, to make an intensive investigation

of each depositi or to estimate available tonnages within narrow limits. Such











data should be obtained by those who wish to utteirt economicc development

at a given place. Tho .chiof obj.ict. of this report is tc aid such persons

in outlining general sreas wh.re dolcmitic linmestono deposits are favorable

for intensive prosp.3cting. Analyses have been-made of samples from the tost

holes drilled, and thies serve as an index to the.lquality. of.the'limesione.

The test drilling for.this iork was done with a.Bucyrus-Erie, Type

21-W, drilling rig. This machine was transported in the field by. a 'l ton

truck. Since the main objective Qf tha work was to dJtermine the deposits

of cormnmrcial value, most of. the holes were comparatively shallow, rarely

exceeding 50 feet in depth, which would probably be below the economic' mining

range. However, a few deeper holes wore drilled for.geological' information.

Many surface samples wore collected and analyzed in the course of the work.

The field work for this investigation was begun on October 16,-1941,

and continued until July 15, 1942. During that time, knowndolomitic liie-

stoan locations wore visitd, together with others, which woro found as the

survey progressed. Befor'j going. into the field, permission was obtained from

the State Roid 3ep'-rtmant to .rill.on Stato ITighway right-of-ways. Permission

was obtained from the Board of County Commissioners -to drill on tho county

roads in o:chi county where work was plamnnd.


Acknowledgment s

Thoe 'iter wishes to express sincere appreciation to the many individ-

unls who furnished information and aid during the' progress of the work. Espe-

cial mention is trade of the following porsbns who gave generously.of their ...

time and assistance: Barney O')uinn and McCall Whidden, Perry; J. W. Robinson


-2-









and C. C. Ward, Gulf Hammock; R. K. ing, Dunnellon; L. F. Fernald, Tarpon.

Springs; A, B. Edwards and W. K. W olfe, Sarasota; and E. F. Staples, Samoset.


Terminology

Strictly speaking dolomite is a double carbonate of calcium and mag-

nesium in which the magnesium carbonate constitutes 45.65% of the rock and

calcium carbonate constitutes 54.35%. During the last few years the term

,"dolomite".has been greatly abused, and now frequently includes all relative-

ly high magnesium limestone. This practice has been carried into a number

of publications and if continued can lead only to general confusion and even-

tual wide misunderstanding just as has 'occurred with the. term "marl." Some

limit should, therefore, be. placed on the use of the term dolomite. For the

purposes of this report the following scheme of classification will be used:

High Calcium Limastono

95% CaC03

Limestone "

80'to 95% 'CCCO

Magnesium limestone or dolomitic limestone

Limestone with att eas 0 MgC3

A. Low grade magnesium limestone 20% to 30% MgCO3

B:. Medium grade magnesium limestone 30 to 36% MgCO3

C. High grade magnesium limestone 36 to 40% MgC03

Dolomite

At least 40_O g C3

Locally in most of thoe magnsium limestone areas boulders have been

found -that show a CgO3 content exceeding 40%. This condition is not general,
fond3 9 sio








however, and is apparently due to concentration due to leaching of the calcium

by surface waters. No deposits, in which the MgCO3 content exceeded 40 were

found that wore of sufficient size to offer dovolopient.


Origin and Mcde of Occurrence of
Florida Dolonditic Li .-stones

In peninsular Florida, dolomitic limestones are found in a narrow

strip along the west coast from Jefforson County to southern Sarasota County.

In general those deposits arc confined to the Cligocone and Miocene rocks

which nre exposed it or near the surface throughout the area. Al6ng the.

Stsinhatchoo River the Oligocene sediments nro relatively thin and the Ocala

linrstone cf Ejc.no ago outcrops in many places. In this area it is likely

that 6ho basel portion of the dolomite is prcbebly Ocala in ago. The rock is

so badly altered by sclutioni and recrystallization, however, that is is. impos-

sible tc identify fossils with certainty, and the oxact age of the rocks must

r-rrin in doubt until bettor fossil spocim3ns are found. In the.vicinity of

Red Lr)val in Citrus County similar conditions persist. A few very poor spec-

imrns of LeGidecy:lina, a characteristic fossil, have boon found in dolomitic

rncks at the Gulf Dolcmite Coma-ny's mine. The spccies at Red Level could not

be identified, but inasmuch as LepiHocyclina is net known from the Oligocene

there, and is common in the Ocnla, it can be inferred that nt lerst a portion

rf the olomitic section is Scceno.

Dolomitization may be primary or secondary. Primary dnlomit.iAtion

me-ns thrt the mineral dolomite was formed and depr sited when the sediments

were l!i down. Sccnldary dolcmitization is a roplacemont process .in which

a prrti;'n cf the calcium of the original rock is replaced by magnesium in .


- 4 -










solutionI, or,it enay be; du toconcenotration of itiaghnsium by leaching .but a

part cf, the, criginal:.calciumA in -arc ek that contains a relatively small

amount of magnesium. The calcium is mere soluble than the magnesium'and goes

into solution quite readily par.ticular)iy when exposed to waters with a fairly

high H2C00 and .organic acid ccnt't: The :magnesium being much less soluble

would remain, -andiin :timo would. constitute a''large percentage of the remaining

reck. Theo fact th.t most of:the Florida adposits show strong solution activity;

that inI many cases almcst::comDplete: crystallization of th3 rtck has taken piece;

and that the highest, mgnosium'c-htnonnt is in exposed crystalline boulders, very

lccal in extent, would indicate thct concentration by thd leaching of the cal-

ciun by surface waters has played an important part in the fo-6riticn.of the

Fl.rida. doloitic -limestono. .

., Sea, wator-containsmagnesium 'i quantities equal to about 3.77% of the

tctal.salt, or 0.14% ofI.the tctal content. It is generally believed that sea

water. acting on. exposed limestone will tend to replace a portion of the cal-

cium.with .nmgnesium. :This replacement process- is: probably most active in warm

and. shallow seas. i Thp sees that hve covered- the l.igocene ad Miocene por-

tions of Florida .ince, their original deposition-ihdve all' probably been rel-

ativel y,,warm, and they have boeni co-marat ively very shallow. These were ideal

conditions for the dolomitizaticnio .o :these'.r.cks. The question may be raised

as to why there are hto.highor grados .of ;dolmitiC limestones and even true

dclomit fpunpd i-n lorida:. Thisis is prc.bdbly -largely due to the fact that the

parent, ~ oks. werP ,generally high lelcium or' s1 igitly fireinacoous li T b-one con-

taning o.vorylittlqEagnesium-.- -> "- -

Theip ;lo idence toindicato prinray lotmitizatin of rocks now

....~~~ ~~~ /... .-









exposed in Floride. In evwry case the limestonos that do no show evidence

of leaching or rocrystallizEtion are all high in calcium &arb6nate and show

only a trace, if any, ;egocnsilum.

The present investigation indicat-,s that tho dolomitic limestones

of cormorcial importance in peninsular Florida occur as irregular path1es

bordering the west coast from Jefferson County southward into Sarasota

County just south of the town of Sarosota. Between Crystel River in Citrus

County and the vicinity of Palmetto in Manatee County such magnesium limo-

stonus as do occur re of very low grade, highly siliceous, and are confined

to vfry narrow strips adjacent to th3 co-st line. This samo condition'is

also found in Dixio County.

The dolomitic limostonas found from Citrus County northward are Eocene

end Oligocune rocks and ir-sjnt a very different character from those of Man-

:tec and Sarcsotn counties which occur in Hawthorn Miocone deposits. In gen-

oral they are light buff to an almost iron brown in color. They all present

a crystalline structure being composed of masses of small rhombohedrGa crys-

ta.s. This is thb loss common crystalline form of the mineral dolomite.' The

exposed rocks nro usually quite hard, but because of tha crystalline structure

Psy be broken f-irly easily nnd can be pulverized quite o0sily. The dolomi-

tic limostones in Mnnateo a.d Seresota counties are usually light shades,

oven white in color, end show a high.percentage of silica. Below the hard

rock occurring near the surface, locally known as "tr-vertine", tie deposit

becomes much softer and is gray in color. This mAterial is-high in silica" end

contain some alumina. It is quite clyeyy in appornrnco and is designated by

some pit opir.tors Ps "soft dolomite." It is less dolomi-ticthan thn overlying


- 6 -







hard rock, the magnesium carbonate content being from five to ten per-cent

less. This soft material might t best be termed "doloitic marl.'" The high

percentage of silica and alumina in the magnesium limestone of Manatee and

Sarasota counties may be accounted for by the fact thrt the original rock

was a sandy limestone containing scme clay.




T .- he uses rof dolomtit'o-had d6lloitict l'imstone ,and the commercial pre-

parations derived frrm themr are. too numerous ,rnd varied to receive any extend-

ed treatment here. This discussion will, therefore, be confined to those uses

which offer possibilities for the Florida rock or which have been suggested

as potential. ;he .uses have been divided into two groups, the first of those

in which the chemical character -of thsrock is most important and the second

in,., which the -physical. properties are most important.


Uses for Which Chemical Properties are Important

Agricultural limestone:

To date the only important development of the dolcmitic limestone

of the State has been for agricultural lime. Limestone of various forms.

added to the soil as a soil conditioner particularly those soils having a low

pH value. Formerly high calcium limestone was. most commonly used for this

purpose. It has been found, however, that the effect of the high calcium lims-

stone is shorter lived and there is greater chance to damage crops by its use,

Magnesium limestone on the other hand is used up muich more slowly and. the quan-

tity applied does not have to be controlled as. carefuly.. These reasonss have-

led to widespread use of magnesium limestone ana dclnri.tes hi p-eference to


- ,' 2








high calcium limestone. The better gratos of Florida dolcmitic limestone are

ideally adapted for agricultural use and a continued development of the depos-".

its fcr that puro(.so may bo expected.

Many fertilizers have inert products afdod cs a filler to give bulk to

the final product. In the cnso rf certain types that have a tendency toward

an acid reaction either limestone or dclchite is used for the filler. Those

snrvo the double purpcso of nuutrelizing the acids to give a physiologically

b::sic product i.n alsso add bulk. Dolomitic limestonos such as those found in

Flcrida are excellent frr this purpose..

C.irbon Dioxide:

Within rucont years carbon dioxide -gs has become widely used in its

slid f
typo rf r.friatiicn are numerous -and it is nr.w ccmlonly used in refrigerator'

trucks und is becoming mere ccnarrn on railway refrigerator cars. To Florida

which is a 1:reg shipper rf fruits Eind vogotablos proper refrigeration is very

essential. This has lod tc a general interest in the possibilities of the...

devolonoent cf Iry ice plants in the State to supply railway and truck cars.

Crrb-n licxide rny be made frcn both high calcium limestone and from

i'lun1mite Lnir -ol
slower reacting and yield loss CO2. For this reason they are less desirable

than the high calcium recks. On the othor hand, in areas such as Manatee and

Seavr:stc ccuntius from which largo qunntltias of fruits and vegetables are

shipped, nul in which hig cr.lcium lirTostonis are nct obtainable the magnesium

limost-nos offar distinct possibilities.





S8 -






Glass


-Dcloirait is used as part of bhe mixture employed for making glass.

Iron oxides are very undesirable, however, and it is difficult to find a

dolomite in which the iron oxide content does not exceed the maximum limit

allowed. A uniform grade material is also necessary, in order that a pro-

duct of, constant chemical composition may bo produced. This uniformity ig

apparently cnt found in the dolomitic limestone of Florida.


SPaper'

Dclomite Iis used iinthe sulphite process (f pulp manufacture by the

Tower system. This method, used: principally with wood of coniferous trees,

involves digestion of the pulp in an acid liquor undr high temperature.

Dolomite used for this purpose should have a unif"rmn ratio between calcium

and magnesium and low in total alumina, iron oxide and silica content. The

dolcmitic lirmestones of Florida in general are not suited for use in paper

manufacture, because 0'f the'high percent of silica.


Rock NWool

Impure lirtstonos or dolomites are used in the manufacture of rock

wocl, sometimes called "mineral w:ccl." Limestones or 'clomites used in rock

wcol manufacture should contain between 20 and,30 per cent carbon dioxide,

equivalent to 45 and 65 per cent calcium and magnesium carbonate. The re-

miinder of the rock should be mostly silica, or silica and. alumina. Iron-

sulphide is undesirable. It is thus seen.that a very impure siliceous dolo-

i ,mit useless for. many .ther. purposes, maybe utilized fer the manufacture .

of rock wool. If one .or more essential component pxats.: are_ lacking or are.

of insufficient quantity in the dolomite, clay, sandstone or other rocks

9- .
.. .7 i .. .: ': iii i ;i: :i t::k ::: o. ,:::<: .9 .: :- i ,: .--:ii, i ,i :) -- ... .: --.:. i. :. .-- -:-:







high in silic:i or alumina may be addod in order that the resulting mixture

nmay meat the chemical spclfications gjven abovo.

For the manu'c~retre of rock wool, the raw dolomite should be broken

into rather small pieces, perhaps from 2 to 5 inches. It is then melted in

an unlined water-Jacketed steol kiln, coka being the fuel ordinarily used.

The temperature required varies somewhat according to the nature of the raw

mAterial, but the probable average is about 1500* of 1600 C. After reaching

the desired temperature, the molten material is drawn off in a small stream,

and subjected to a blest of steam or air under high pressure. This steam or

air Jet break the molton material into tiny globules and propels them through

the air at high spood. In their flight, they are drawn into minute fibers,,

tha phonomnon b-inn arnalogous to a comot and its tail. The "shot" .are then:

romovod by sc-ocaiug, ind the resultant fluffy mass, resembling shops wool,

is propelled into a collecting chamber.

Rock wool is a ha..t insuleticn product. The market for this material

has grcn-tly incro.nsd throughout the United States in recent years. Its use

in Florida to date h-s not boon oxtonsivo, and no rock wool is being produced

at the present time. The cost to tho consumer in this section is, therefore,

greatly increased by high freight rates, as rock wool is a light weight pro-

duct and only about 12 tons c.n be packed in a freight car ;. As'tho gno.ral

public learns of the benefits of insulation, the nood for a rock wool plant

in Florida will become apparent.

These benefits include considerably reduced fuil' consumption during

the winter months together with groator comfort evonf with a fine heating plait,

exposed surfaces of walls, ceilings or floors in tha average h6me are likely


- 10 -







to become too cold unless they are heavily insulated, thus causing discom-

fort c6 the occupants of the building. The some insulation helps to keep

these surfaces cool in summer, and iray oven mIke an upstairs room comfortable,

which without insulation would be insufferably hot.

-With sufficient advertisement a rock wcol plnnt in Florida should

have'gdod premise of success. This nlant should be located in a region which

has adequate distribution fccilitJes. Careful attention should be given to

the quality'of the m?nufactur:,d product. It should be equal to the strnd.rd

brands on the market today. Although the cost of a pl.nt for the manufacture

of rock wool would probably not exceed $75,000, sufficient capital would be

needed to tide over the period roauired to build up a market, as heat insula-

tion in homes is still in its infancy, ard the. potential customer must be

shown the benefits of such insulation.


Magnesium

Thd investigation of dclom itic limestone deposits in Florida was

stimulated by the the nhe national Defense Prcgram for a greatly increas-

ed production of the metal magnesium. This metal is one-third lighter than

aluminum and is being ccmbirnd with it to form strong light alloys so im-

portant in the manufacture of airplanes and automobiles. Another important

use of mgncisium at the "present time is in pyrotechnics and incendiary bombs,

Magnesium was formerly extracted from underground brines and.sea water. Re-

contly it has been obtained from dolomite.-: ..This new source of magnesium has

resulted, in much prospecting and field investigation for suitable -deposits

'-throughout the Unitad States., The future of magnesium as a major metal now

seems- assured4, Its, light.wiight, and. strength, when ccmbirneod :with: aluminum-' -








will result in its extensive use not only for the duration of the war but

thereafter as well.

Dolcmite or lolomitic linusteno used fcr the extraction of magnesium,

shcul hdvo' a nmgnosium carbcrnto content of at least 40 percent. It should

be 1 w in impurities, ospocially silica which is d3trimontal inrefining. A

potential dcprsit to be used for the extraction rf magnesium should be in a

r,,girn where chop pcwer is vecilablo. These requirements make the Florida

dolrmitic limustono dcprsits unsuitable, as most of those deposits are too

high in silica for the extraction rf nmanosium and there is no cheap pcwer at

hrnd f-r roductiii -:f thQ iirotel.


Usus frT Which Physicr.1 Properties are Imp),rtant

Building Stono

Physical rather than chemical pr-:'.porties go-varn the quality of a

building stnem. It should be homononocus in structure, high density and low

pcr.sity, :s wcel. as ploe.sin-; in ccler. Dep sits inteniod for use as a source

*f cirt stone shcld be crnpcse~d cf relatively thick strata. They should be

rLthur freu of joints and se:ins, also chort ncdules and other hard masses.. It.

is difficult to fial reck in Flrrila which meets those requirements. A large.

well-equippe-d pl-nt f rmorly ,operating in Manatoo County has been idle fcr

many yorrs.


Crushed Steno

The production of crushed stone in recent years has been vury' large,

due to the great anrunt *f highway construction and theirr building activities .

Lilmast, no is the corn-only used rmtori!n for cr.nerote asgregato, althnoughother


-..18 -







kinds cf crushed stono such as slc.g -n. gravel are used extensively. Crush-

ed stone is also omployod tfor rcad stone. anmirailroad ballast. The physical

properties of tto -ston ae are of riie importance fcr these uses. On account of

its low price, the choice betweenn limestone and Iclomite would be governed by

the availability of -the niterial. and its proximity to markets.

Aggregate. should consist of hard clean, .durublo, strong, uncoated

fragments, free from injuries amounts. of soft, friable, thin, elenga ted or

lamini.ted pieces free from dirt. Roed stcne should be resistant to abrasion

an.l break into angular chunky, fragments. Many Flori.a dAclcmitic liimestenos

are unsuited for this ,ss aasthey do not break cloen.


Prospecting fTr Dolomitic Limestcncs in Ficrida

Field work done by the Florida Geological Survey is described by

counties. Hole.locations and a brief description of the material found in

each hole are given, followed by. conclusions drawn. Following these descrip-

tions are:tabulations showing the log of each hole together with analyses of

the sampless' ,-evation based on mean sea level (United States Geological

Survey) are also given. .


Taylor County

Residual boulders of dolomitic limestone. cover much of Taylor County.

These boulders are widely distributed, although not -continuously, between the

Aucilla River on the.northwest to the Steinhatchee River on the southeast.

Work was begun at Covington in the northwest tart of thI county,

: though this location was thought to be north of the dolomite area. Hole D -1

in the N i Sec. ,33 ,T2S, R5, was drill-odon the side of the road opposite the


13-











(



:
0-1'^l>on
.7 Z.
"-" -
<


L~XBFID


Area
ccn.C


I O, \4 \ i '
"1 '*.. ..
l^ -"- __ -A< ,- ._



/-I -- ), A) p
.0







s of Potentia
S, .. ,,,o J,',-
I'./ ,, "'











s of doUt ful
o i -l-u-- i.
\, --. -
_- .':^ .. .- ._
--- .--. -_... \'.,_


L ~ ~~--- -/|...------V-1-. i"/*/



CIb o!\ 1


Dolonitic stations are represented by the lottery "D"
followed by a numoral.
Limustono statitcns aro rGprosented by the letter ."L"
follo"iod by a numoral.

10 r 0 10 Miles


Map of Taylar County showing dolomitic areas and locations of test wells;


-14 -









Rollins houso, nearthe old railroad!station site. This hole showed 15 feet

of sands at whioh point ;a sandy gray .imestone Was encountered; This forma-

tion was pnoetrated-wit.h.little or no change to a depth of 33 feet, whore

drilling, w, stopped.

SHole DT-1A was drilled about 700 feet to the south near the Vann res-

idonce. This ,hole went through 10 foot of sand, then into siliceous limestone,

which continued to a depth of 23 feet.* The ground was caving, and the forma-

tion unfavorable, so the hole was stopped at that point.

Hole DT-2 in NEi Soc. 25, T3S, R4E, was drilled on State Highway 10A,

at the intorso.tion.of a road running southwesterly to Soanlon. This hole went

through one foot ofe sand, into a high grade magnesium linmstone with little

variation, except for a two foot layer of siliceous material between three and

five foQt,,to the bottom at 38 feot. The average magnesium carbonate content

for the 33 feet below the silicoous seam was 37- per cent. This hole is evi-

dently near.the northern boundary of tho deposit.

Hole DT-37was.drilled at Scanlon in the NW Soc. 23, T4S, R4E, between

the Aucilla and EcdnfinaRivers. From surface indications Scanlon was thought

to be near theoeastorn limit of thc dolomitic deposit, and results of the drill-

ing confirmed this opinion. Bolow 5 feet of sand, 5 feet of high grade magne-

sium limestone was found, in which the magnesium carbonate ran 38 per cent.

Below this thequality decreased gradually and the hole was stopped at 25 foot

in an extremely siliceous, caving formation.

... Hol Dr-4 in $SW Soc. 8, T4S R4E, was drilled near Nutall Rise on the

Auoilla River, at: Padgett's Fish. amp, and ponetrated five foot of sand .and 15

foot of high grade magnesium limestone. The magnesium carbonate content


-15 -






averaged 38 per cent.

The results from these three bolos, together with surface showings?;

indicUte a block of high grdeo maSnesiun limestone, lying between the Aucilla

and Econfina Rivers and oxtondinzg from State Highway 10A on -the'-north to the

Live Oak, P-rry and Gulf RAilway on the south. This area is approximately

five mila s long and 3* mWles wide, This area probably continues south of the

railroad to tho Gulf, but this part of the deposit lies in low, wet marshy

land which is discouraging to ccnmmirciar ddvolcpmont. -For 'this reason, ,.no.i

prospecting v.as undertaken and this part of the deposit is' not: ITluded' in any

ostiRtat.

The ar:;a described above is favorable for mining operations. The over-

burdou is shallow rnd water would not grma.tly interfere with mining operations.

The Liva Oak, Perry and Gulf Railway is at proeodt available for transportation.

Dolomitic boulders are exposed along the snnd rcpd frcm Hampton- Springs

to the fish c'ip near the mouth of -ho Fenhollowny River.

A soriis of throo holos wrs drilled along this road. Hole DT-5 in Sec.

36, T5S, R5, ':s drilled at the fish camp about l: miles from the mouth of the

rivur. After goiui throuSh 5j- foot of sand and clay,: low grpdo magnesium

limestcae wns ontored. This averaged about 21 per cent maghesium carbonate to

a danth cf 25 feat. The hole was then ccatinuod to a depth of 150 feet for

CoGlon;icl infcrerrtion. B0tweon 25 and 95 foot, a dolomitic zone averaging-

about 30 p.r cent magnrosium cRrbonset wrs penetrCted. Bolcw 95 feet, the for-

mation wrs a soft CrXy liiest:no, which continued to the bcttcm cf the hole at

150 fcot. Because the mapuesium czrbcnrto content was low grpdo near the sur-

faco this hole was not considered to lie within a potential area.


- 16 -








Hole DT-6 cas drilled in Sec. 21, T5S, RSE, about 4 miles northeast

of hole D1'-5. After going through 10 feet of cnnd, a medium grade imgnosium

limestone was entered. This c-ntinuod to the bottom of the hole which was

stopped at 30 feet. The average magnesium carbonate content fcr 20 feet wNs

about 30 per cent.

Holo DT-7 was located in Sec. 14, T5S, R6E, about 6 miles northeast

cf the fish camp on tcp rf a sn.nd riage. Below 30 feet of sand, 45 feet of a

very low grade magnesium limestone was penetrated, with an average magnesium

carbonate content of 16 Der cent. A siliceous soft limestone was entered at

75 feet and continued to the bottom of the hole at 120 feet.

Southeast of the Fenholloway Fish Camp Road there are no evidences of

dolomite on the surface. For this reason and also due to lack of accessible

roads, few holes wore drilled. Hole DT-8 was put down on State Highway 35 at

a point about 4s miles northeast of Adams Beach in Sec. 26, T6S, RVE. This hole

showed heavy sand and was abandoned at .a depth of 13 feet, as unfavorable.

Hole D2-9 was drilled in Soc. 23, T7S, .SE, on the sand road from Salem

to Fish. Cre.k, about 5 miles from Hole D2T-8. After going through 10 feet of

sand and weathered limestone, a medium grade magnesium limestone was entered.

This continued to the bottom of the hole at 40 feet, and the average sample

was 33 per cent ragnasium carbonate.

A series of test holes was put down near the Steinhatchee River between

U. S. Highway 19 and the mouth of the river below the town of Steinhatchee,

formerly called Stephensville. The eastern edge of the dolomitic area is appar-

ently near the intersection of the river and T. S. Highway 19, and at this place

gray-Ocala linmstone underlies dclomitic boulders along the right bank cf the


S : .17
.- i
7








river above tha highway bridge.

Hole Df-10 was drilled in Sec. 21, T8S, R1OE, above the bridge and about

1CO fC t north of tht river bank. This holo showed low grade dolomitic rock to

a depth of 2C foet. Botwoen 20 and 45 feet, a zono of fairly high calcium lime-

stone was found, containing about 4.5 por cent magnesium carbonate. A high grade

magnosium limestone was penetrated at 45 feet and continued to the bottom of the

hole at 62 feet. The average magnesium carbonate content was 36 per cent in this

bed.

About mile west of Tonnille's store at the intersection of U. S. 19

and State Highway 69, a larog number of dolomite boulders are exposed on the

surface. Hole DT-19 w-s drilled in SW0 Sec. 16, T8S, LOE, among these boulders,

and a very low grade monnesium limestone, very high in silica, was entered at

5 foot. There was very little cherio in formation tc the- bottom of the hole at

55 foot. The m-.xirum msncnsiurm c-rbonato content was 15 per cent.

Hol IY-17 was 'Irilled in Soc, 29, T8S, R10E, on State Highway 69 about

2 ruilL.s scuth of U. S. Highway 19. This highway runs roughly parallel to the

riv r. The Pol ponetratod 15 foet nf sannd and was discontinued because of this

havvy overbur dn.

Hola ]P-12 w::s drillcl in Sjc. 29, TSS, R10E, on tho dirt road leading

to Stoinhatchoo Falls about 1 mile from Highway 69. This hole showed sandy

linestono which became highly dclomitic towards the bottom.

01oa DT-13 was drilled in Soc. 29, T8S, R10E, near the falls on the

Stoinhatchao River about 100 feet from the bank. A ledge of dolomitic rock out-

crops for smo distance along the river at this pla.co. This hole showed 2 feet

of snnd and clay, then 3 fsot of sandy dolomitic limestono material. Between 5



18 -










and 15 foet high grade .mgnesium limestone was- found, the average magnesium

- crb^nate content being 37 per cent. From 15 feet to the bottom of the hole

at 20.feet, the quality dropped sharply.

Hole DT-14 was drilled in Soc. ^5, T9S, R10E, near State Highway 69,

about 5 miles southerly from Clara, and about mile from the Steinhatchee

River. This hole showed 15 foet of sand nnd was discontinued at thnt depth.

At the town of Steinhatche in Soc. 25, T9S, R9E, Hole DT-15 was drill-

ed on the roadside, near the.ferry landing.. After going through 10 feet of

sand, a low grade limestone,. very high in silica and showing 9 per cent MgC03

was.. encountered and continued tc a eopth of 30 feet, at which depth the magne-

sium. carbonate, contntnt dropped below 5 per cent.

Hole DT-16: was drilled inrSoc. 26, T9S, R9E, on the roadside about

opp site Louis Mitchell's store and cafe. This hole showed only sand and mud

to a depth of 30 foot, and was evidently drilled in a solution cavity.

In order to check this immediate locality, Hole DT-17 was put 'own

about 300 feet farther west. This hole showed 10 feet of very siliceous lime-

stone, and 25 feet of soft gray limestone. This hole was continued for geolo-

gical information to a depth of 250 feet, and penetrated a slightly doloriitic

lim stone from 25 to 85 feet and a high grade magnesium limestone with the

magnesium carbonate content running between 30 and 40 per cent, from 85 feet

to the completed depth.

l Dolomitic boulders occur in large numbers 2 miles northwest of Stein-

.hatchee along a dirt roed running roughly parallel to Deadman's Bay.

Hole DT-18 was drilled in Soc. 21, T9S, R9E, among the bouldersa-btwoen

Bradley 'Spring and. the, marsh below. This hole was in sand. and dli0omitic boul-
1 9 .








ders to a depth of 5 foot.. At this point, low grade sandy limestone averag-

ing 17 per cont magnesium carbonate was onecunterod which continued to the

bottom of the holj at 30 feot.

Summarizing the results of the drilling along the Steinhatchee River,

it seems that the dolomitic deposits are irregular and of variable quality.

The area of high grade dolomitic limestone along the river is probably ,not

moro than 4 mile wide and about 4 miles long. The evidence from Holo DT-9

together with information obtained from this work along the Steinhatchoe

River, however, indicates the probability of large quantities of dolomitic

limestone betwoon Eole DT-9 and the River. No work was attempted between

the Steinhatchoo River and Hole DT-9, because the few primitive roads which

serve this territory could not be traveled by the trucks and drilling rig,

however, this area should not be overlooked by anyone who might be interest-

ed in dolomitic limeotone deposits. Good transportation facilities aro avail-

bblo a-ong the northeast side, either by the Atlantic Coast Line or by truck

ovur U. S. Highway 19.


Dixio County

On the whole, Dixie County wrs found unfavorable for dolomitic lime-

stoni. Fo'i surface outcrons or residual boulders aro found. Some dolomitic

boulders wore soen along the Stoinhatcheo River in the northwestern part of

the county, also along the shore of Horseshoe Beach. Most outcrops through-

out tho county reo Ocela limestone, and are especially noticeable along and

norr the Suwannoo River, which forms the eastern and southern boundary of the

county.

The first drilling in this county was done near the mouth of the


- 20 -







TAYLORl COUNTY LOGS OF TEST HOLES AND CHEMICAL ANALYSES OF SAMPLES

Depth Elev. Char. of Material i O M'c, O 000::
gr32"n "e 3 .. .. .. ... .. 2,
...... .i. L i3 ... .; .I .; .. .."


DT-I .


0-5 40-35 Send
5-1035-30 Same
...L ---r -, ._,_i- . ..'--- '-- -r'--~-- .. .


15-o-?0 25-20 Sand and clay 6.2 0.84*

20-25" 20,-15 Sand a little m 10.9 1.16
.0,,,.. D 2 .9 .6A
.:25-X30 1'5--O Snndy limestone 25.9 .6.64

'30-33 1 10,


A


-10-5 iSand
...;, .. ., : ..:: .. _..]..- ._ ,, ,, .__ ,. __, ** ___ ''


1 -T
1.- 2 25

15-20[i 9.B


0.12 02 93.53
1.01 2.1 '2 4.26 7.6 8 58

I;38 2.9~ .i, 1,"9 I 74.87
31. 33- 57.W
i'0. 68 "1.04 32.52j 58,...0" 35.,14


i.' !


~-1-- -1,. 9 r- -


.1 *:


I' ..i~.


Sand and clay, some 5.2 3.75 0.06 0.12. 8.69 15.5 71.40


sEame 3.5 1.64 0.20 042 2.7 14.1 78.34
*e .. .1 t. 0 5 I. I .


5.2 6


-.1.20..-23 Seme
.;L ^. ,.. .. ..._ ^, .. -


I ,c


-i --


-


.-- I-- I- I I-- -- i- .


L ---- 1-


~
I .~ i II'


1.40 I 0.16 I0.33 b, 43 : 18. 6 7 ,375
~ ~ ~ ~~ ., "", : !, : ... :'" ,-.,,,::,,,':,,'., ,:'., .






TAYLOR COUNTY

Depth Elev. Char. of Material I r Fe g 0 GaO. CaCOI SiQ
'. 'rj:tioxi Fe, 9 11CO3 Ca_3I-74-


DT-2


2C-.25 9-4


Dark top soil
Weathered dolomite 46.3 0.68 1 19.28 40.3 32.48 57.9 0.82

Sand d dolomltio 22.7 0.52 9.33 19.5 15.64 27.9 .50

Dolomite Some sand 42.4 0.32 17.65 36.9 29.28 52.2 10.1
--___________ __ I ___ __ - .


Dolomitic limestone


Same

Same


45.7


4. 7


46.0


0.64 19.46


40.7


S0.40 19.06 39.9

0.16 17.33 36.2


31.91


56.9


31.90 57.0
1 I


61.8


S2.3


1.. "

1.65


25-30' Same 46.3 0.18 17.09 35.7 35.03 62.5 1.5

L50-56 hard dolomitice, 45.6 0.28 17.11 35.7 33.52 59.8 3.5
1- 4har; dolomitic 52;e- 11-7 50 3935
36-3 same 3__ 5. 2


OT-3

0-5 1ki4-9 Sand

i5-10 9-4 Dolomitic limestone 44.3 0.20 18.32 38.3 i31.40 56.0 5.94

-1C-1 Z S..nd :dolomlic I3l.st 37.9r 0.24 71 96 27.48 9. 27


~ -r'A


i


7


t
cu
cu


34.65'






TAYLOR COUNTY


Depth El ev.


Char. -of Material,


ln Fe203 0 C03 ICa o Ca300 SiO


DT-3 (Continued)


DT-4


DT-5


0-.5 6. 5-1.5 Sand and clay
5-10 5 Sandy dolomitic lime 36.4 1.16 [ 8.20 17.1 32.19 57.4 19.70

10-15-3 8 Hard dolomit-ic lime 46.4 ~0.34 13.67 28.6 37.19 66.4 0.79
15-20 5 ame 44.6 0.54 8.88 18.6 41.87 74.7 1.

20-25 2 i.5 Same 42.3 0.32 9.62 20.1 37.02 66.1 9.90
25-30 '.1 Softer olom-ti- lime 4'67 0-2- 17-07 35-7 34.8 6-1.-9 "- -6
25-30 -23.5 Softer dolomitic lime 46.7 0.26 17.07 35.7 34.68 61.9 0.6
E -23 SfelIme __


---


-~-~~-~---


-~ -- -


| i | i




TAYLOR COUNTY
-1Dep th lev. Char. of Uaterial i',iotn Fe2o MO MigC0 CaO CaC3 S1o'


OT-5 (Continued)


30-35 -2 Same 46.8 0.28 10.98 122.9- 40.96 73.1 0.52
35-40 Same 4.5 0.32 15.52 .52.4 36. 21 64.6 .155
40-5 5 Same 46.2 0.28 16.32 434.1 34.98 62.4 1.92
4 65.7 0.08 13.-96 o 2 i3T.721 7.72 i0 557
145-50 Hard doomite lime13.96 29.2 67. 1.54
150-55' Same 46.1 0.23 17. 86 37. 13 4.55 61.6 0.79

55-60j 3 S4me 46.7 j 0.17 8.46 17.7 43.78 78.1 O.56
1 60-65 5.Sane s47.1 1 0.28 9 3.6 -40.87 72.9 0.35
65-71C j5 Same 47.0 0.40 15. E 33.0 36.50 65.1 '0.30


~75-50 Sme 4.6.7 0.32 183.80 9.3 9 32.95 58.3 0.83
S5i 46.3 I 2 1 5.. o .
80-a85 Hard dolomitic liae I C.32 C.59 22.1 C1.24 73.C.53


J5-90 15 a e ( C5' ) 47.1 0.26 17.91 37.4 134.40 61.4 C29
0-5 -63.5 se 459 1.05 .4 .5 2.57 5.1 0.57
i95-10 l Softer dolomitc lime 44.6 0.22 5.22 10.9 49.33 83.1 iC.26
0- 5 Soft Lry li~,e3ton 2.3 0.12 2.43 i5.2 1 52.j 93.9 0.47


,.. L





TAYLOR COUNTY


DeOth Elev. Char. of Material L ostn F M
I I I Il__ I gitiol e 3 %0


2.41


M0, I CaO CaICO 0 *
.-1 1 > 3 -[S -I*


DT-5 (Continued)


'~o~ 1. 6


0.1 J53.60j37 j.J


Same 3.4


93.0


6.6


- .3A-1035=1 Same


- Same 44.5 0.12 -2.50 6.9 51.89 92.6 0.32 -


3.79


*Same


S44.6-


0.14


7.9


I..


I30 3-F23 Same 44.5 0.10 2.52 5.3 15240 93.6 0. 42
13o0- 23 5- game 44.4 0.07 1.47 3.1 53.03 94.7 -0o-40
1!35- '"'10j, 51.
211 .3 '''5 .4I .. .. 3 0.
L0i Same. 44.2 -0-.04 1.83 3.8 153.41 95.4 0.30
1:45" "-.... Same .. .. -44.2. -0.15 1.52. -3.2 53 .74 95.9 0..28-:

5- 15 Same 43.6 0 1.6 2 2.6 54.79 97.7 0.530

DT-6

0-10 16.5-6.San. .
10-15 6.5-1.5 Sandy dolomite lime 29.1 0.36 12.02 25.1 21.08 37.6 36.93
15-2 .15- ame "' 29.7 0.42 12.22 25.5 21.42- 38.2. -35194-
20-2. 75 3 Dolomitic lime 43.8 0.18 17.13-- 35..08. -59.0 -5,93


52. 10


51.10 91.2


0.34


0.35-,


U "
I


. "'


j53.-60-- .7 .6-1-


--1 105798h,.5


13.4


0.14


1.62


Same


44.5


0.12


.Leu t.- M 5 1 ,5
125- "1 -lSe.5-





TAYLOR COUNTY


IDepth -i.ev. Char. of Material i-t?.nj Fe203 M0gO NMgCO [CaO 1aC03;i 02. i


DT-6 (Continued)

25-30 21-55 Sandy dolomitic lime 37.2 0.23 15.25 31.9 27.35 48.8 19.86
30-32 5 f Caving ground rnampl )

DT-7

0-5 3 5- Sharp sand
0 .'Sme 14 0
5-10 5 5sme 0.65 0..0 0.10 0.20 0.18 0.52 98.20

10-15 2 5 White beach send 0.29 .0..17 0.08 0.16 0.14 0.25 99.08
15-20 2. 5 s1me 0.22 0.14 0.05 0.11 0.10 0.18 99.42
20-25 435 White beach sand 0.16 0.05 0.04 0.08 0.11 0.20 98.42
25-30 14S ame 0.18 0.07 0.05 0.11 0.08 0.15 98.57
30-35 95 Sandy brown limestone 17.99 0.39 3.72 7.77 18.52 33.06 58.82
35-38 5 Same 120.74 0.34 4.06 8.48 20.25 36.12 53.60
38-40 5 dolomntc ll meston 13.9 0.30 4.57 9.56 10.46 18.66 68.96
-0.5 B1e3.93 0.30s4on.5 .6.93 1.41
40-43 -0 5 Ho~r mig climeston 39.99 0.82 6.76 14.13 34.81 62.10 16.84
43-45 3S Same 36.98 0.32 7.48 15.63 34.17 60.951 20.64
_ _0.__3_ _








o s ov.
Deptj Elev. Char. of Material Ma C. 0
____ It,_Io__0_5_'%_6__ MgO3 I C`0e-C


TAYLOR COUNTY


OT-7 (Continued)


A"- 'u ULvUWJ.
dolomitio limestone


hard and soft dolomit


Soft dolomite


Sand dolomitics ;me-


I Same


44.52


e 44.90


44.59


30.48'

32.69


3.86


0.55
0.21.


0.38 I
0.2 '
O. 4 i


7.82 16.35 40.80 72.80

6.08 112.70 '43.21 77.10
8.77 18.34 40%.18 71.70


10.17 I21.24 43.52
12.23 25.57 2''55 1.98

9,17 19.06 27.56


77.68


39.22

149.16


2.33

4.93
5.42


5.74


33.94
30n.27


75-8'" slihtl c a- 4. 0. 0.67 1.39 3.69 6.58 91.29
40-.. 5 reus -4
o-8 -, 5-; dclomitic lime 16.99 0. 15 3.25 6.78 1692 630.19 62.58

85-90 50 Same 15.92 0.11 1.37 2.86 118.05 32.21 64.37
a" m 0
90-5 55- S~ay gray limestone 20.42 05.11 1.57 .27 23.78 42.82 53.9:3
9_ -9 .55.5 .7

S 605 same 25.99 0.11 1.74 3.64 30.46 54.33 41.75
9 .20 _3305
0- -j65-5 Seme 30.00 0.13' 1.74 3.62 .34.85 62.20 33.05
1 __ __e__ 0L 3.155 5 L 2 27.63-0
.5 0. Same 3203 0.34 1.55 34.25 .6.26 27.63
~~~~~~~ .- ... _:. . .


35.58


0.12I


1'.42


2.96


242.69 |7


120 -.5 Samne39.2 0.13J 1.66 3.471 47.12 1T8
712--1 05 sam


6. 14 20.08

4.10 l11.40


45-5C
50-54

55-6C


65.-7C
70-7


I
C'


-35 5 5


1-3U I -Y. 5-
115 .1-75.5


'-


- -,4--


"-


L


---;- --1 ----~------ 3


---


39.81


m I I I I


I Same


aGsIy i mesdtone Iess
Sajidyr





TAYLOR COUNTY


Depthj Elev. I Char. of Material


IgnitioFe0 M~O MSCo J CaaO .aC03 io 10
LI ______


DT-8


0-5 43-38 Fine, brown sand
5-10 38-33 Same
10-13 33-30 Same


DT-9

0-5 34-29 Sand with lime fragsmexts
5-10 29-24 Scndy limestone
LO-15 24-19 bot snay
dolomite lime 34.83 0.39 14.15 29.59 23.90 42.66 25.09
5-20 19-14 Same 41.05 0.2 16.76 5.13 28.76 I 51.35 13.08
-25 14-9 Same 3.25 0 .43 15.70 32.2 26.60 47.47 17.68
':..... .. _ I I


50-35


25-3f 9-4


4-
-1


Same 35.52 0.50 16-20 33.87 27.51
Harder, spndy dolomitl
....- --- I--- -- -t-- ---
lime 6.61 .43 14.99 31.34 25.
me 42.65 0.50 16.59 35.32129.?91
Same i I "


49.1


45.12
53.50


14.56


22.23

10.32


55-401 --


.I


_ -I


--






TAYLOR COUNTY


Depth Elev. phar. of Material g n jFe23 MgO MgCO3 CaO CC03 3 SI2

DT-10

0-5 19-14 Sandy dolomitio lime 26.20 1.43 5.73 11.98 23.55 42.03 .40.48
5-10 14-9 Same 38.47 0.37 8.35 17.45 37.35 66.'68 14.19
10-15 9-4 Brown dolomitic lime 45.92 0.11 13.21 27.62 39.74 70.97 .1.22
15-20 Same 44.37 0.16 5.20 10.87 49.43 87.90 0.86
20-25 -ig Hard, gray lime slightly ___
dolomitio 44.15 0.1 2.56 5.28 52.78 94.20 0.49
25-30 -O S.me 44.15 .0.13 2.57 5.36 52.42 93.60 0.65
-11.
30-35 -6 Soft, ray, limestone .44.46 .0.15 ..2.15 4.49, 53-31 95.19 0.32
30-35 T16 r&.Y, limestone _.15, ..?.15
35-40 Same 44.12 0.14 2.10 4.38 53.44 95.43 0.35
40-45 "-21- same (Cavity43'-45') 43.78 0.23 1.55. 3.23 53.87.: 96.20 0.20
45-50 ..-26- Soft, gray dolomitic 43.79 0.13 io.96 22.91 42.03 74.98 0.67
S-5 -. lime ------ --
50-55 same 45.51 0.16 11.03 23.05 42.83 76.46 0.29
55-60 -.41 Same. 48.34 0.15 16.68 34.86 35.12 62.70 0.13
60-62 -41 Same 48.13 0.17 17.42 36.4,0 54./02 60.70 :0.351
13 -4_____ 5 21 _______" ________ -


i1








TAYLOR COUNTY


SDepth Eley. Char. of Material I gn tion Fe20 jMgC3 Ca


I. i ,4 I


ta"G 2.


DT-12
---- 3.53 6.50 .
0-5 177-12 Sandy clay and lime 30.53 0.85 0.86 1.83 37.29 66.50 29.

5-10 12-7 Sandy gray l3"es;ton 38.11 0.40 0.52 1.09 47.32. 84.84 13.40

10-15 7-2 Same 40.63 0.29 0.96 2.76 49..5 6.'97 T 75

-1520 2- G3r .y., dolog g~ li:e-i 42..56 0.29 49 7.3 4.3a 86.0 3.79
S_________ --jI--3---
S431 6.21 1 7 4.

DT-13


0-2 i14-12 1 S9ndy clay
--+-- --- -L --'-- -i~-
2-5 12-9 Sandy dolomite 40.50

15-10 9-4 Dolomite 46.10
1I -S 46.80
0L-15i T siame 46.80


*


4-------- ---
.96 i12.76 26.7 33. 41

0.18 118.20 38.1. 34.15

.2 17.07 35.6 1 34.49j
r.12 _1


59.6 1-r.85

60.7 1 .19
--61.50
,61,.50 n.49


S ...


i .


- -- -


,,,-


--


r


''






TAYLOR COUNTY


Depth Elev


Char. of Material ikF tn F~ M0 1"MgCOC3 ao CcoC0, S
0 0 3 C a


DT- 13 (Continued)


DT-.4.


0o-5. 18-13 Sand' .. j


5-10


13-18


1C-12 3-6


Same

Same *


________________ I


DT.- 15


S. 5-. 5
i .


ZIeL.Low senad *.
I . .


5-10 [. -..
o- :i i -.4-- ... S ame. n
10-15 -6.5 Sandy limestone


-0.1- j
-11.5 Same ..


-11
* tj:


Same


1315


I 0.43


-' F ---
i I


; 63


__ I


32.50 3


0.33


4.74


- i -- 1- I


1 38.48.


..- -I-?. _


-21. Sandy, soft limesto, 29.06


0.23 3.97


S17 2.'87


_________________


9.69 31. 63 54.46


7 T '


9.91 24..74 ..6.74.. 27.6


6..rn I 45..11


8.30 31.39
r


80.52, 13.4.


76.22 34. 9!


I.

'-I


15-20


20-25


25-30


--


- -CI ---


I


- ---


,.,,.. .


- --- -- '"'


__I_ '-.L IIII~-~-II~- 1 ;-- -I- f


J


--


352.6]


! I "


I


'-~- -


1


I I .~.I





TAYLOR COUNTY

jDethI lev. Char. of Material I- ion I 2 MO MgCOO C3aO aC03 102]

DT-15 (Continued)

S3035 -25 21.11 05.16 2.13 4.45 23.02 .41. 8 49.6
0 2 T 63.1
S5-40 S 16.19 0.22 0.95 2.0C 18.82 33.59 63.1
40-45 5 Sandy, soft limston 26.4 0.16 1.64 3.42 32.31 57.67 39.3

4550 -i.5 Sae -36.75 0.11 3 .26 6.81 42.28 I5.45 17.6

DT-16

10-5 5-0 Brown sand andd mud
5-.0 -- ---
5 SI Se me
10-15 -5- Same


15-20 15_-.__e i i 1e
---, ------
20-2_5 i -2o i- s"ae I i \ 1 '_ _

I 25 i i

DT-17


0-2 14.5-2.5 Srnd


S0.50 [0.12 0. 17 .3 0.51
__-L-__ --J ___


0.90 99.2





TAYLOR COUNTY


Depth Elev. Char. of Material Igt n Fe201M MgCO" CaO CeCO IS 1

DT-17 (Continued)

2-5 0.5 Sanr and limestone 14.84 0.48 0.38 0.79 16.72 29.83 66.46
-10 Sandy limestone 3828 0.40 0.71 1.48 47.13 84.19 :13.19
10-155 Same 35.80 0.30 0.74 1.54 48.25 86.13 .11.77

5-20 -10o.5- Sand, soft limestone 42.94 0.12 0.67 1.39 153.90 96.20 12.19
"-15.5
0-25 -15 5- Soft., gray limestone 43.13 0.16 0.67 1.39 53.99 96.38 176-
5-30 ame -4.4.o0 0,121 4.15 S8. 69 15070 90.50 .07
-25. 5- harc magnei ur lime- 4471 012 756 15.82 84.0 0.69
-35-40 55- sor agnesiu llme 45.52: 12.6o 26.5C 75.00 1.01
-35.5 stone 84_____. .
45 5ame. 45.46 0.12 115 .24.228 57 76.n0 0.57
-.50 Se 44.52 0.12 6.1 2.82 48.78 87.09 J.51'
50-55 0. same 44.50 0.08 5.02 10. 48149.90 89.10 0.78
5 -5m0 e "
'' I I i
__ .-! C ". .-r. n ^-. .I- -^ # I


55-60 55
60-65 -55


70-75 -3...-
-_70.5
75-80 -r5


44.29


0.08,


4.7V


9.99 1)" A* Y .f'


I.9 Vyc


Same 44.18- 0.08 3.2C 6.69 52.20 93.18 0.70
Same 44.40 0.081 5.12 1.73 4927.87. 96' 078
Same 44.08 0.10 4.98 10.42 49.84 88.97 1.26

Same 45.09 0.12 12.1! 25.42 41.54 74.19- 0.91
_J I,.





TAYLOR COUNTY


j.Depthf Elev.


Char. of Material


I ~t on i e2 0 o M, C- Ca


DT-47 (Continued)


tCaCO3 812.


80-851 5 soft doloite 46.54 0.08 14.03 30.02 38.20 68.20 0.39
85-90 Hard brown dcomte
85-90 -85 5 ard, brown dolomite 43.06 0.16 15.02 31.40 34.83 62.20 7.27
5^ Sme 46.59 0 08 16.6N 34. 72 36.21 64.32 0.67
95-1'AC -90 5- Seme 46.51 0.10 17.67! 36.95i35.06 62.60 '0.8
-- -[ ', i !
IC. ^.S'4e 46.54 0.10 16.7 35.10134.10 60.84 2.72
I-. s-, me 46. S2 r.1 18.461 3o.6032.63 58.24 3.0
i i --- -_
I1 Se 9 46.90 0.08 18.09i 37.0 33.36 59.40 1.66
__ __ 46.54 03 16. 2 5,
SSame 46.54 30.08 1. 26 3. 19 34.2 61.06 1.51
1 i.- Same 46. O". 12 1.15 37.95' 34.47 61.50 0.52
5 -- S-r.e 45.81 .2 .46 8.4 32.35 57.84 3.3
...^ -.-- -y '.es,-.. 35.36 0.10 14.32i 29.92! 25. 'A 44.65 25.13
5 ^ Se.dy dolomite 41.77 i.16 16.721 34.r3' 29.15 52.04 12.301
1, -e- 41.52 i 0.1.6j 6.2 35.17; 29.52 52.73 11.84
S- Se 42.74 1 17.2 i .24 54.2 9.22
15 I
p1. I s-e 4 0.29 17.05 35.65i 0. 53.60 10.06
1- "T -'' ~~~ C- 7.9 c. 16 1-4.46Yt.221 26.>6 4756 21.54
1_ 1____ 0___5 SCe 372 .-.A L.


---------- -


............... F-





TAYLOR COUNTY


Chr.r. of material gi tion Fe2 0 M 0 MgC


CaO CaCO; 3


OT 7 (Continued)


16 -160.i 5 Softer, brown dolo- 45.31 0.19 18.87 39.43 '1.26 55.83 3.85
S55 Same 46.21 0.16 18.94 39.54 31.70 56.30 2.01
170- -1 5.5- ame 45.0 0.14 18.45 358.55 31.'09 55.-50 4.62
175 -170.5 : Same 45.08v
175- -~70.5- Same 46.66 0.17 18.65 38.99 31.25 55.80 3.17
1o 175W 5
----- -----m-____- .-...... .-
180- -175.5. Softer, brown dolo- 45.39 0.11 18.37 3.8.41 30.90 55.20 4.45
LO- Hard, porous dol-o- 45.31. I0.12 418.29 38.20 30.44 54.39 5.74
190 L185.5 mite _.
190- -185.5- same 46.40 0.12 18.84 39.36 31.60 56.44 2.66
195 .19. 0. 5
195- -190.5- ame 45.77 0.14 18.56 i38.80 31.62 56.50 3.23

200- -1 5. ame 584 0.12 18.35 38.38 31.79 56.80 3.75
205- Same 0.11 18.00 57.60 31.36 56.00 4.80
205-. m e45"08 "
0- g'------------ --.-- -- --- -- ----
210
210- -2 1.55- ame 145.24 0.13 17.36 36.30 29.91 53.40 7.32
__5_ -_0l;5_ ______.. "-_________ __ -_-_ -- --
215- -210.5- ame 45.95 0.15 18.52 38.71 31.80 56.80 2.88
- -- 0 _15 A -
-j ___5_ Same 46.37 0.12 f18.46 38.60 32.41 57.70 2.17
225- 20.5- Hard, porous dolomltt45.02 0.12 17.95 53750 3140 56.24 5.03
230- -225.5- same 45. 66 0.10 18. 37.60 31.59 56.40 4.06
P'-3 -230.5 1
235- -230.5- :Same 45.83 0.12 18.62 38.90 13.78 56.76.. 3.03
240 -235.5 __


Depth Elev.


--~-


-~' -~ -- --






TAYLO'


COUNTY


! '" "' ',..,

.",*:) .* ...


.'. ,-* *.
, .... .. '
* : ,
* -. ,


0.17 1.40 38..46 31.55 5.'6 4.16
0-14 18.57 82 .1.7 57 .45


DT-tI
-.-TTT^---"---------r --- --- --------'r"(- ----
0-2 5.5 Sand
5 i5- very sa ha-y ------ ---- -- ---
2-5 5* magnesium lime .

-1mag n 2 es= le 22.25 0.50 17.04 14.2 36 32.7
10-,15 -2.5- Sme 120.31 0.38 7..27 15.68 5.29 27.30
... ". f-j 5 "__ ..- ___
15-20 -.sa-e 1-2.01 0.40 11.58 24.22 25.15 44.55

~20-25 -.. dy mgnesiui i 8.30 0.38 75 1.0 35.95 64.15

25-30 -17..5- Seme 133.C6 0.40 55-69 11.90 41.171 73-43


I',


_51.a07
55.94

30.64

16.20

13.59


SSena n-d f
0-5 235-18 dolomitic boul--:s s

5-I c-13 'Very sundi 1-0 t 47 26
i m siu3 ie 23.f 0.c 7 .20 :15.1 1. 1 35.6

1-15 13-, 23 13e 23.2 762..23


ep lev. Char. of Material Fe.e !ffCgO.3 0aC0 Sig.-C


-.T DT-17 (Ccntiniued)


I
i:
7_


.-


- ----


.lr
.~
''
"' '
~~- - ---



-






TAYLOR COUNTY

Depth Elev. Char. of Material Ignito r Feg I MgO O Ca Cco iS02

DT-19 (Continued)


15-20-


20-25 35-


- -2-
125-301 -
"7


S30-35 -'712


135-40
-45


-12-

..22


Same


Same


Same


Same
Same


45.-50 "'22.- Same 18.0 0.


50-55 32 ame
LFI5L -32


14.5


15.6


31.3


18.8
23.6

27.3


14.0 Io0.


28 4.53 9.5 11.33 20.2 67.22
81 4.03 8.4 13.12 23.4 65.22
42 6.72 14.1 29.71 53.0 28.60
46 5.88 12.3 16.04 28.6 58.45
56 6.87 14.4 20.98 37.4 47.77

'50 7.07 14.8 p 24.68 44.0 39. 72
80 6.4 13.5 13.69 24.4 59.99
66 4.23 8.8 11.78 21.0 68.59
J_ .m..-.


- ---'


I--c.-- -.I .~


~


- I iii


L






2-wQ
i


y 'A <. < \, i



i--_n .- /"

i


; ,f





L33END
'-Z-- Areas of doubtful commercial value


10 0 10 Mliles


Do-omitio stations are represented by the letter
"D" followed by a numeral.
Liriestone stations are represented by the letter
"L" followed by a numeral.



38 -


Map of Dixie County showing dolomitic areas and locations of test wells.








Stoinhatchee Riv-jrat StoWar l; City, opposite Stoinhatcheo on the Taylor County

side of the river. Hole DD-1 was put down in Sec. 26, T9S, R9E, along State

Highway 295,, ab6ut A mile blow the forny landing, noer the residence of Mr,

Fletcher. Medium tnd low grade magnosium limestone wrs'"eonetrated after going

through 10 foot of sand overburden. This condition continued to the bottom of

the hole at 25 foot. The best of this material showed 29 per cent magnesium

carbonated

Hole DD-2 was drilled in Soc. 26, T9S, R9E, about mile beyond the

end of State Highway 295 whore dolomitic boulders end boulders of Ocala limo-

stone cutcrop. Tho hole penotre.ted 5 feet of sandy overburden and very low

grdeo magnesium linmsteno and 15 foot of low grado rr.gnosium limestono which

averaged 26 per cent magnusitun crrbonvtto. The quality dropped sharply below

20 feet and the hole was stopped at 25 foot.

Hole DD-3 was drilled in Sec. 18, TllS, R11E, on State Highway 289,

between Cross City and Shelton or Horseshoe Beach, at a noint 13 miles from

U. S. Highway 1. at Cross City, This location was near a school on the south

side of the highway. 'This penetrated 10 foot of sand and limestone fragments

and 5 feet of low grade magnesium limostono which when analyzed showed about

25'per cent ma0nesium oarbonato. Bolow 15 fcot the m agnosium carbonate con-

tent decreased rapidly and the hole was stopped at 20 foot.

As stated above, a few dolomitic boulders wore observed along the shore

at Horseshoe Beach and it is possible.that a narrow deposit lios along the bench

in this section. Reports on wolls drilled hero, however, aro not encouraging.


S, Lovy County.

Dolomitic lirnostones have boon r.)cognized in Lovy County for several




DIXIE COUNTY LOGS OF TEST HOLES AND CHEMICAL ANALYSES OF SAMPLES

Depth Elev. Char. of Material Ignition I2V i !U 02


o-10 14 S and
10-105 "9 Sandy dolomitic lime 137.8 .1.79 13.46 28.1 29.94 J3.4 14.90 j

15-20 Gray dolomitic lime 43.3 0.32 4.49 9.4 49.04 87.5 1.985
} -- i- zr ^ *------ -- *- ---- *- -- -t --- i --- --.... -| --- .- "--
i20-25 -19 Same .43.6 0. 23 3i .61 7.5 j51.38 91.6 1.02
.25-30 .1 same 6 ...0.28 113.88 29.0 36.79 65.6 4.75
253 t-- -. I'--- -
I3050 -299 ame 43.5 0.28 ?11.04 23.1 71 72.6 4.26f
5- i0 Same 44.0 0. 15 6.70 14.0 47.30 84.4 1.24
DD22
0-3 6-3 s and
3- 3-1 Very sandy dolomitic lime 118.88 0.20 7.64 15.97 12.02 21.45 60.85 1
1 .... --i ,--
i5-10l Sandy dolomitic lime 33.39 10.99 12-75 26.30 23.25 41.45 27.71
0-15 Same37.38 01 .4 2.17 25.42 2B 5 1. 19.30
15-20 "4 Se 42.20 029 i13.43 2.o 34.0 i1.7 8.62
i20-25 ~- same ---42.04 0.24 8.55 17.87 41.0b .
-1-S
0-10 '15-5 S& nd
012 5-3 Sandy dolomite 38.7 00.26 12.05 25.2 33.20 59.2 15.4
.12-15 3.0. .. ... .. 23 45
12 -15 -0 Same 35.2 0.25 11. 58 :24.2 28.65 51.1 25.45
1520 -5 Calcrous sand (cving). 17. .26 6. 26' l. .14.42. 25.7 .-48
15-20 -5 Calcareous sand (caving) 17.7 0.26 6.26 13.1 14 .42 25.7 61.48
o. 2. -6 L!.3- 1 -14 .42-125









years, the Dixie Lime Producbs Company having mined this material for agricul-

tural limestone since 1934. Their pit is located in Soc. 12, T16S, R16E. The

Cummer Limo and IfMnufacturing Companly, Pox 4640, Jacksonville, has done consid-

orablo prospecting about two miles south of Ellzoy, and preliminary investiga-

tion by tho Florida Geological Survey showed other important and extensive

potential dolomitic areas in the county.

Prospecting in Levy County was begun at Gulf Hammock and adjacent tor-

ritory. Hole DL-1 was drilled in Sec. 21, T14S, R16E, on State Highway 15

near the side round loading to Hotol Haim ock. Medium gredo magnesium limestone,

high in silica, was penetrated in this hole from 1 to 4 foot, and a high grade

magnesium limestone continued from 4 foot to a dopth of 25 feet, and averaged

38 per cent magnesium carbonate with a low silice content. Polow 25 fe.t the

magnesium carbonate content dropped to about 31 per cent, and the hole was

stopped at 30 foot.

Hole DL-2 was put down in Sec. 21, T14S, R16E, near the Gulf Hammock

school in Sec. 21, T14S, R16, This hole showed 10 feot ef low grade mwgne-

sium limestone averaging 25 per cent magnesium carbonate. At this level a

high grade dolomitic limestone wtas entered. This continued to the bottom of

the hole at 25 feet, and showed an average magnesium carbonate content for this

15 f-ot thickness of about 38 per cant.

Hole DL-3 was drilled in SE Sea. 28, T14S, R16E, on State Highway 15

about 2 miles southeast of Gulf Hammock. This hole went down 12 feet in sand

and clay showing it to be outside the dolomitic area in and adjacent to Gulf

IEamock.

The rig was moved back 0.7 of a mile southeast of Gulf Hammock to T.

J. Peek's store in NWJ Sec. 28, T19S, R16E, where Hole DL-18 was put down.


41 -









After going through two foot of sand, a high grade dolomitic limestone was

untorod. This continued with little variation to the bottom of the hole at

40 foot. Tho avurnge magnesium cnrbouato content for this 38 feet was 36 per

cont. This hole is o::ce.tional both in thickness and uniform quality.

Holo DL-4 wes drilled 1 3/4 miles from Gulf Hammock in Soc. 16, T14S,

R16E, on the county road running northeasterly from Gulf Hammock at a point

nonr Wokivn Crook. The drill penetrated 1 foot of sand, 6 foot of siliceous

limostono, 5 f3ot of low grado dolomitic limestone, and 13 foot of high grade

'.ol(mitic linostono. The hole was stopped at a depth of 25 foot, still in

htigh grado dolnlnitic limustone. Tho magnesium carbonate content for the lower

13 fcjt was 36 our cont.

Hole DL-19 was put down in Sec. 22, T149, R16E, on the Wekiva Road, at

the Smallwood form, about two miles northeast of Gulf Hammock. This hole showed

only a very siliceous limestone to a depth of 25 feet, and is evidently east of

the do'omintic Itnmetone area.

Hole DL-20 was drilled in Sec. 16, T14S, R16E, about 1 mile northeast

of Gulf ''armock on the W'elVivo road. This hole after going through 5 feet of

siliceous limustone, entered a bed of low grndo dolomitic limestone which con-

tinued to a dpnth of 25 feot. The average magnesium carbonate content was

about 27 pur cent with a very high silica content.

In order to d-,tordinu the extent of the dolomite deposit north of Gulf

Hamiock, lHolj DL-5 was put down in Sec. 17, T14S, R16E, on Stato Highway 15,

1l miles northerly from Gulf ianmock a short distance south of Waccasassa River.

After going through 5 foot of sindy low grado dolomitic limestone a medium grade

of dolomitic limestone was found for 1G foot. This averaged 31 per cent magno-

slum carbonate. A high grado dolomitic limestone was found at 15 feet which


- 42 -










continued to 25 foot, the bottom of the hole. The magnesium carbonate content

for this lower bed was 38 per cent. It is well to mention that in cutting a

channel along the Waccasassa Rivur mony dolomitic rocks wore thrown out on the

bank. This further supports the opinion that thj Gulf Hammock deposits extend

northwesterly at least to the Waccasassa River.

Hole DL-21 was drilled along State Highway 15 nt a point two miles north-

erly from Gulf Hammock in Soc. 8, T14S, R16E. This hole went through 8 foot of

sand and clay overburdon, and 7 feet of low grade magnosium limestone with a

magnesium carbonate content of 24 per cont. Bolow 15 foot, the material drop-

pod sharply in magnesium carbonate, and this condition continued to the bottom

of the hole at 40 foot. The results obtained from this hole indicate that the

dolomitic limestone on tho northwest side of the Waccasassa Rivor is of lower

grndo than that on the southeast side. However, sufficient work was not done

to draw definite conclusions, as hand auger borings indicate that the dolomitic

deposit extends across Otter Creek at least as far .s Sec. 11, T14S, R15E, where

some prospecting was done a few yeprs ago by the Cummer Limo and Manufacturing

Company. North of this point to Ellzey, outcrops show siliceous limestone,

indicating the dolomitic area is probably narrow and irregular. All of this

section north and west of the Waccasassa River is a low, wet, hammock, where

there are no good roads. Drilling in this area was done during a rainy season

and it was not possible to got the drilling rig into this particular section.

Hole DL-22 wrs put down in Soc. 5, Tf4S, R15E, along the State High-

way 13 near an old limestone pit, two miles southwest of Ellzoy. Bolow 3 feet

of sand, a soft gray siliceous limestone was found to a depth of 10 foot. Be-

low this depth the material was loss silicoous to the bottom of the hole at 20



43-
,i ) "* : 4 *. '.* '*




















A" Vo" V 1
eI j" i "O ".
", 2 .... "---_ -- .l







S.EE ;..--.-v.--
I \- ,Ci4N---- I.











--. ,-.._ ....... .. 1.. lo o Bo M13
L +

l Aroas of potential
commer 11al value.

Aroas of doubtful
commercial valuo.



10 0 10 Iil38
)0- [T-T TThLZ~'~ .---


.. -. ... Dolomitic stations aro reprosontod
INSWT "A" by numorals.

Map of Levy County showing dolomitio areas and locations of test wells.


S44 -










feet, but none of it was dolomitic.

In order to determine the extent of the deposit southwest of Gulf

Hammock, Hole DL-16 was drilled in Soc. 29, T14S, R16E, on a narrow paved

road running southwestorly from Gulf Haumock, at a point lI miles southwest

of tho town The hole penetrated 2- foot of sand, and 182 feet of medium

grade, siliceous, dolomitic limestone averaging about 30 per cent magnesium

carbonato. From 15 feet to a depth of 35 feet the r;,agnesium carbonate content

drbppod considerably, but gradually increased from 35 to 50 feet, the bottom

of the hole. The average silica content for the dolomitic limestone section

was about 11 per cent.

Hole DL-19 was put down.in Sec. 2, T15S, R15E, southwesterly from DL-

16, along a dirt rord leading to tho site of an old fiber factory. The sand

bed was 24 feet thick at this point, and overlies a medium grade of dolomitic

limestone. This continued to a depth of 2b feet with an average magnesium

carbonate content of about 33 per cent. Below 20 feet the magnesium carbonate

dropped sharply, and this condition continued to 50 feet, the bottom of the

hole.

It is quite probable that the dolomitic formation outcrops southwest-

erly to Waccasassa Bay, but it was impossible:to move the rig. farther down

the roed, so it was necessary to abandon the-work in that direction.

The drilling around Gulf Hammock indicates that there is a large area

of rather high grade dolomitic limestone in this immediate vicinity. This po-

tential area is designated on the map of Levy County. A general estimate indi-

cates a potential area of about 125,000,000 tons averaging 36 per cent magnesium

carbonate. The overburden is shallow and would not be difficult to remove.


45 n








This dolomitic limestone underlies a low hammock section, and water would

present a serious problem if it woro attemntod to mine to the bottom..of dopos-

it. Water could be pumped out of the pit to a depth of 10 or 15 foet, without

great difficulty, or the limestone could be mined under water from dredges or

by drPgline oxcnvators. Transportation facilities are good as the main line

of the Atlnntic Coast Line R.ilroed passes through the area, and a hard sur-

fcead highway is avilable for possible trucking onorations.

A block of dolomitic material of slightly lower grado averaging about

30 ecr cent magnsium carbonnto, lying southwesterly from the above deposit

and roughly p-rallel to the Waccasassa River is available. This area is pro-

bably bout 1 mile wide and at least 3 miles long. No attempt has been made

to figure tonnages as this area is further removed from transportation facili-

ties and the water problem would bo groster.

Thu investigation of other Levy County deposits being continued Hole

DL-6 was drilled in Sac. 4, T19S, R16E, along State Highway 15 at a point

2 3/4 miles southeast of Gulf Hammock. This hole was unsatisfactory as 15

foot of sand was found, and it wes abandoned at that depth.

Hole DL-7 was put down in Soc. 9, T15S, RISE, southeasterly on High-

way 15,4 miles from Gulf Hammock, and ponetratod a low grado fossiliferous

dolomitic limestone at a depth of 2 feet. This formation continued to a depth

of 15 foot where the hole was discontinued.

Hole DL-8 wns drilled in SWl Seo. 10, T15S, R16E, on Highway 15 at a

point :3 milas northwest of Lobanon Station. This hole showed siliceous gray

limostono from the surface to 15 feet, at which point the material changed to

a siliceous low grade limestone averaging 17 per cent magnesium carbonate. This


46 -










bed continued to 25 feet where the hcle was stopped.

While those test holes along Highway 15 were quite unfavorable, there

is nevertheless some dolomitic rock in this territory. A pit about 200 yards

from the road, 3- miles southeast of Gulf Hammrock:, exposes a good quality of

dolomitic limestone, a surface sample there showing 38.8 ner cent megnesium

carbonate. The deposits are irregular and would require intensive prospect-

ing to trace out.

No further tests were made along State Highway 15, as a sand ridge

covers the deposit as Lebanon Station is approached. The next drilling was

done on Highway 15 at a point 2 miles south of Lebanon Station, in Sec. 36,

T15S, R16E. This Hole, DL-9 went through 25 feet of sand where it was stop-

ped.

Hole DL-10 was put downin Sec. 1, T16S, R16E, 3 miles south of Lebanon

Station. Results there showed the same situation as above and the hole wss

stopped at 25 feet, showing it to be in the same sand area. Dolomitic boulders

outcrop, however, about a mile west of this hole.

Continuing south toward old Lebanon Hole DL-11-was drilled in Sec. 6,

T16S, R19E, at a point 3.0 miles south of Lebanon Station in Sec. 6, T16S,

R17E. A very siliceous limestone was encountered after going through 15 feet

of sand and it became slightly dolomitic at 19 foot. This fcrrmtion continued

to 30 foot where the hole was stopped, as unfavorable.

Hole DL-12 was drilled in Sec. 12, T16S, R16E, at old Lebanon. A sil-

iceous, gray, slightly dolomitic limestone was encountered after going through

2 feet of sand. This continued to a depth of 15 feet. Below this point the

magnesium 'carbonate content decreased, and the hole was abandoned at 30 feet.


- 47 -








Hole DL-13 was put down in the SW Soc. 12, T16S, R16E, on the old

Inglis Road near the old dolouito pit of the Dixie Lime Products Company.

This hole showed very siliceous limestone to a doeth of 20 feet, and the hole

was discontinued. The thick sand osction in this hole shows how quickly the

dolomitic formation may change, as the old pit about 200 yards northwesterly

from this hole was mind for sovoral years from which a large tonnage of dol-

omitic limestone was removed.

Hole DL-15 was drilled in the NW7 Sec. 12, T16S, R16E, on the south

sida of the present pit of the Dixio Lime Products Company. The test hole

ponetritod 4 feet of sand, 10 fjot of low grade siliceous dolomitic limestone'

avoreaing about 20 per cent magnesium carbonate, and 15 feet of high grade dol-

onitic limestone avernaing 36.2 per cent magnesium carbonate. The total depth

of the hole was 35 feet.

It is quite possible that the rock underlying the area between the

Gulf Hammock and the Dixie Lime Products Company pit is dolomitic for the en-

tire distance of about 10 miles; at least, it is probable that dolomitic depos-

its occur inturmittenly. Surface indicttifons support this opinion. It was not
/
prccticablo to drill this section, however, as there are few roads over which

a drilling rig may be transported, especially in wet weather.

Hole DL-14 was drilled in Soc. 25, T16S, R16E, along State Highway 15

at the intersection of the now graded road and the old rock road. This hole

was disappointing, as it showed sand overburden to a depth of 20 foot where a

very silicoous low grado limestone was penetrated. Drilling was stopped at

25 feet.

No more drilling was done south of this point toward Inglis, as surface


- 48 -





LEVY COUNTY- LOGS C" TEST HOLES AND CHEMICAL ANPLYtES OF SAMPLES

!Depth Elev.1 Ch.r. of Material .antio F2 3 MGO MGCO Ca0 !0 .S0o _

.- 1

0-1 13-12 Sand and clay
1--5 j12-8 Sandy magne s um lime 42.9 0.52 12.35 25.8 36.15 64.5 7.
I5-8 8-5 Soft dolomite 45.8 0.36 17.6l1358 33.49 59.71.~~
8-10 5-T3 Harder. cdlomite. 46.3 o.30 18.64 39.0 33 .-920.5 0s7.3
10-15 !Lae .i~3 6. o.26 18.74 39.2 331 59 6.476
;2____ i Me -. .. :33
15-20 Same 6.0 .0.28 18.59 38.9 3*37 59.5 "'0-8
-:7I )6 1?),MTit 6 slig&h t'ly -- --- -- - a
2 -25 h- s irtey 44 0.22 -17.49 36.6 332.69 f 3.3 4.28
,.ay ...... l I
25 5Dolomitic limestone 1 44.4 0.35 14.76 30.9 137.45. 66.8 j1,06

DL- 2
0-5-- 12-7 Sandy- marei ie7
.... 2
0-. 1-7 "andy magnesi--- ''lmeI ~-1.4 1i68 9".41 97 67 .46.5 .29.70

5-10' 7-2 Sandy medium dolomite 39.9 0.68 14.74 30.9 30.11 53.7 13..15
10-15 2- Soft, brown dolomite 45.0 0.28 17.73 37.1 .133 31! 59.4 2.93
15-20 '7 same 45.4 0.26 17.85 57.3 33.39 59.6 2..57
25' 'ame .0 0.25 1.55 8.8 3 59
0'' __ 25' 'Same ______ IWO______ ____ ___ ___ ___ ______





LEVY COUNTY

epth Elev. T"Char. of Material IiitAio 1e20 0 i C00 a0 OCaCOO jS0

DL-3

0-5 11.5-6.5 Sand
5-10 6.5-1.5 Sand and clay
10.-.L2[ 1-5-. Same

DL-4


0-1 17-16 Sand
1-7 j16-10 Soft, sandy limestone 22.64 1.04 1.82 3.81 24.82
r
7-12 10-5 Sandy Magnesium li;4- 37.62 1.05 11.00 22.99 31.70
+.. a stone 1-00.2299
12-15 5-2 Brown dolomite 46.46 0.43 16.70 34. 9E 34.93
15-20 Grey dolomite 45.09 0.55 17.43 36.55 33.90
20-25 -3-5 i Sme J 44.83 0.52 117.52 536.65 33.22

DL-5


144.31
56.58
62.39


47.67
17.82
1.69


60.50 1.6
59.30 0.80)


0-5 15-10 Sandy dolomitic limc i
5-1 10"-5 Sandy edio-
5-o1 10-5 Sandy, medig gilo- e 44.01 0.80 15.29 31.91 34.12 6C.90 5.15
10-15 5-0 Same 44.277 0.56 14.89 31.16 36.62 65.35 2.13
I I,






LEVY COUNTY


Depth Elev. Char. of oMaterial s on Fe02 it ~ O 2


DL-5 (Continued)

15-20 05 iSoft dolomite 45.93 .46 J18.8 359.50 33.10 59.10 2.:95
5_ -- .-.. -i
20-25 O Same 45.15 .... 47 17.4 36.58 32.65 58.27 33


OL-6


0-5 11-e

5-10 6-1

10-15

.,. .


~ ~
r
c!
uS.
r


0-2 .11-9. Sand i "

2-5 9-6 ossilirerous dolo- "
i fltio lime Saeples last .not aealy ed
5-10-1 6-1- Dolomitic lirestone

10-15 1-4 .Sam&

.__... _,_ _,.-.__ _


~t-7


.





LEVY COUNTY
-. t2.. _20. I o-s s e.,-
Depth Elev. Char. of Material gn_ 2 50 M 3 Ca0 jCa COM3 8'02

DL-6

a ____ .*---- .-. ---. -
-5 11.5- Sendy grey limestone 37.79 14.13 1.04 2.18 45.06 80.44 10.70
5-10 6-.' Sne 30.8 1 7;46 0.42 0 .88 36.61 65.3 26.24
1-15 -.5 Same 30.29 2.60 0.82 2.48 6..09 63.02 27.84
15-20 -3 5- Sendy mamr Esunum lime 31.30 2.52 8.34 17.44 27.82 49.67 27.82
S20-25 S"ai S3me 30.02 2.41 7. 2 16.36 26.30 46.S5 1.06

DL-

0-5 30-25 S. d
-. ., L -----r, 4TT I-_
I5-10 25- 3e
10-15! 20-15 Srnd
.,15-20 15-10 Sa me
020-25 IC-5 Same

rL-IC

0-5 i40. 5-35. t So-nd '
5-10 i .- 5. 5- -5 S L e...- _.
" 1 _'. -_.. .






LEVY COUNTY

Deoth Elev. Char. of Material ti MgCO3 Ca0 CaC03 JSi02


DL-IC (Continued)


1CL-il


;0iO


I43.5-38.-5


Sand


5-10 38.5-33.5 Same -
10-15 33.5-28.5 Same
15-19 245 Very sany limestone 23.62 0.24 1.36 2.-85 27.69 49.43 45.68-
nd- me --lime
19-25 24.5-18 s tly dlomitc 40.05 3 3. 6.96 44.04 78.64 10.16
25-30 ,6.5-l.5 s eme 4 0.26 0.40 2.93 6.12 44.30 79.10 9.23
- "' .....' "" " .. ... D l- 2 ....' "" -

0-2 35.5-33.5 Sand. -
5 5. 5-30 band me, .. '
2-5. 3l5-30.5 slt tl3 dolomitic 37.75 .0.60 2.51 5.24 43.63 77.98 13.92
.5 5. Same8 2.0 6.6 77. 12
15 30.5-25. Same 36.55 0.98I 2.90 6.06 40.57 72.44 16.26 ..


I
tg.
I


10-15 30.5-25.5 Same
15-20 25.5-20.5 Same
20-251 20.5-15.5 Same


-.---. c. ..,--_
i


i




LEVY COUNTY
epti-.-Elevi har of Material ae~n s2 M[M JCaO'0 CO jh~ S I
It'"' ooa, eC

DL-02 (Continued)
0.45 466 1- '9 4.48
10-1 25.5-20.5 Same 0.88 o47 8 7.06 46.62 133.27 6.77
____ ---4 ----------t
15- -2-0.5-15. Same. 41 ,o. 0.28. 1.99 4.15 49.52 88.49 4.48 -
20-215. 5- 10. Same 41.07 0.24 1.,3 2.79 50.0 89.25 4.87
25-30 10.5-5.5 Sane 41.42 024 1.27 2.67 49.19 87.4 5.67

D L-1
-- -__ 7 1
o0-5 29.5-24. Sand i j
.5-10 J 24.5-19. Seme I
-4 -4 -.
lJ0-15i 19.-5-14. Same 3.063 0.16 0.19 0.539 3.25 5.80 92.63
15-201'4.5-9.5 Same | 4.91 10.65 0.20 0.42 0.67 1.20 93.63

OLl-14

10-5 j 41-6 nd
5-101 36-31 Same -
10-15 31-26 Same
f- __ i. ._l1__ .., .. .. ... i ...... ... ._L... ... i






LEVY COUNTY

Depthlev. Char. of Material Fe 0 M 00 CaO taC 1s0
L-14 (C ntinue L
) L 14 (Continued)


DL-15


23-19 Sand
"o vA ^ery sfancdy
19-18. Magnesium lime


13.00


1.42


4..93


10.30


8.57 -


15.29


1~


70-. 70


5-10 18-153 same 27.08 0.18 10.96 22.90 18.84 33-62 41.36
10-15 1-8 Slightly sandy 43.79 0.50 17.46 36.50 30.15. 53-..80 6.99
f1520 8-3 Same 45.47 0.28 .18.42 38.50 31.88 56.90 :,2.72

20-25 Seme 42.97 0.94 16.80, 35.05 31.17 55.63 ;5.74

25-30 -. Same 43.32 0.46 16.97 35.47 31.47 56.67 5.95
K--
30-t3 -I7 Same 45.29 0.32 16.94 35.40 34.19 61.10 2.30
35-40 91 Same 44.59 35 15.41 32.22 35.46 63.20 2.75
40-45_ -gnesium liesto 44.19 0.48. 1.4 27.90 37.27 6658 29
..g... 2 2 -
45-50 22 Same 44.93 0.38 1.97 22.93 40.62 72.60 2.81
-27- 1 4 2 2 9 -


I0.
1',-
1'


- ----t


- .I----t-----


10-4

A5


I





LE VY COUNTY

iept Elev. Char. of Material .tM203 M9CO3 CaO J CaC0 Sio2

DL- 16

0o-2 13-10-o Sand
--5 10-8 Sandy dolomite 40.3 0.62 15o.00 31.4 5050 54.4 12.70
.. .. Sndy
:5-10, 8-3 i agnesium limestone 40.9 1.40 14.09 29.5 31.84 56.8 0.85
--I ..-- ---
10-..i 3- .Same 34.9 0.46 1 3.42 28.1 126.CO 46.4 J24.59
S2- --9--- ----- --------
5-2 Se 41.6 0.40 11.41 23.9 59.00 66.6 7.53
:,15-~-2 -42 I 75. e .. .
F- .'= L ." .... ... ...... .. ...
20-2 --12 magnesium lime 42.6 0.3 75 14.0 44.82 0.0 4.19
j25 -.? 'High magnesium lime i 42.9 0.34 14.07 29.4 135.48 i 63.3 6.37
-"-- -

30C- -3 -22 Srdy magnesium lime 31.3 0.46 10.34 .'21.6 05.77 46.0 31.38
" --- - oi*r .. r -- + -
35-40l' 7 Medilum dolomite 43.7 0.34 '15.92 133.3 33.97 60.6 5.34
SSMe 44.7 r030 15.85 33. 1 .
45---50 .... 64.4 .29
sr e 44.2 0.34 15.06 '31.5 6 29

OL-17

j0-21 7-4-' Send -- ----
12j-5 4-.2 1 S-.dy e.1ed 1:. '70c- 43.1 .56 6.1 .5 132.51 5 691
, 4 I* : _; ,...|






LEVY COUNTY

Depth Elev. Char. of oMaterial L3tnonFeo0 gO "j O3 iOaO CaO3 -02
DL._ n iti_.---_ ; i__-_r 3 .. .,

SL -'17. (Continued)

.5-10 i Same i 42.7 0.58 16.25 3.4.0 32,29 57.6 7.06.

10-15 I- 8 M medium dolomite .45.1 0.46 15.59 32.6 '3588 64.0 2.2

15-20 1 Same 44.4 0.54 1 14.81 30.9 36.26 64.7 2.99
---- ; *' .------------____ i _________'0 5 4_ _


20-25 18

25-30 -
-.-_ -23
130-35 -28
35-40 -33'


4-45 -38

45-5D0 '


Low magnesium lime 43.1

Same 43.4
SSame 43. d
I


0.66 j 8.42

0.32 6.28

0.24 8.10


S17.6 43.60
13.1 46.52

17.0 ,44.50


77.8 12.85
83.0 2.53

79.4 2.46
----- -- "


Same 43.8 '10.22 5.51 i 11.6 48.20 86.' 1..62

Same ,44.1 Q.26 7.-50 15..7 46.00 82.1 36
..46. 1..29
Same 43.8 0.90 | 6.95 1 14.5.46 51 "'83.50 1729

.- *r n -f ', ,.-. ..' ,


*


S0-2 -12-10 Sand

2-5 10-7 f grade dolomite 46.7 10.26 17.13 35.8 34.20


S5-10. 7-2 High grade dolomite 46.0 0.32


-10-15 Same
,1 ~-3


46.1 0. 34
i


18.06 37.8.. 33.29

17.41 36.4 34.98J


61.2


59.4
62.4


1.41


1. 44
0.841
!


---'--`


-- --. -- ------ U~


- L-


--- --


1





I





LEVY COUNTY

iepth ton Mat aerial ton 0 1 L" CaCO

D L-1i (Continued)

_-__ "Sg same 46.3 .26. Y.90 37.4 34.74 620 0.60
-25 gre dolomite 46.1 0.22 4.84 31.0 38.00 67.7 0.89
25-30 g same 46.3 j0.26 27.29 35.9 35..65 63.6 0.50
30-35 High gr de dolomite 45.7 0.56 37.51 36.6 33-19 59.2 2.08
-40ame 45.4 46 18.39. 38.5 3295 58.8 1.67
-. L_ 1 _.. -.-

DL-19

j0-1 14.5-131 Sand
Very sandy limeston
15-e10 29-4 -same 23.1 1.18 0.84 1.8 27.61 49.2 44.10

,'10-151 4- Same .28.4 1.26 '1. 54 3.2 13.58 59.8 28.22
15-2 22 22.3 0.56 1.03 2.2 27.22 48.5 46.30
0-25 127.6 0.401Tp03 2.2 47.15 84.0 .0
Same 10

i -2

S0-1 18--17. ~ .- ..---. .. -- -






LEVY COUNTY


i Depthi Elev. Char. of Material jInition 23


i M gO co CaO' j' C0o 02


L 20 (Continued)


1-5 17-13 Sandy soft limestone 2 29.6 0.82 3.32 6.9 32.60 58.1
S0.62 111.26 23.5 I.
5-10 13-8 Sandy magnesium lime 41.6 0.62 11.26 23.5 37.00 66.0
10-15 8-3 Sandy magnesiuioelo 38.7 i0.83 14.67 30.7 28.92 51.6

15-20 3-2 Sandy magnesium lime 30.4 10.39 12.15 1 25.4 175 38.8

20-25 -7. Same 32.1 0.36 12.82 268 23.21 41.4
is-oi e sana K-- 127. --
25-32 2 aenesclum lime 21.2 04 8.54 17.9 15.30 237.
0 -7 ame 26.1 0.6 5.74 12.0 25.29 45.1
30-35i --7 7 Same 26.1 t 0.36 5.74 12.0 125.29 *451


Very sandy limestone


vearyne sady
Magnesium lime


27.0 0.38
~~ .


31.3


S0.31.


Same


2.28


4.91


5.28


4.8 ;29.27


52.2.


[59.1


63.9 -24.06


D L-21


0-5 and __
5-8 11 Same

8.-10 5- Sandy magnesium lime 38.2 3.11 7.23 15.1 8.01 67.8 12.534
8- o 5. ,_ ,- I _ _


High.magnesium lime 45.2


0.51


113.51
1


28.3


138.62
I


68.9


35-40' -1-
35-40} -22


4-455 -27


45-550 1-


- I
tn


I


J


, "=


.-~111-,--.


- ----- ---


-.0 --------- 0


__ -I


- -- --


--


_ ,,, s -L


10-15 15D-
1.5


- ---


11.1 : 35.82


10.3 .335.17


33.7 0.36


0.54




LEVY COUNTY

/Depth El.ev. LeoChar. of Mater a.l ostio^Wfp.e2o Loa aC~Vo -f

DL-21 (Continued)

15-25 1-j.5 Mud (cavity) 3 8.3 11.48 4.68 T.8 42.62 76.4y 9.20
25- -13.5 Sandy magnesium lime 26.3 1.39 7.24 15.1 279 .2 35.06
___" ~" ...... ..-. -...--.. .. .. .. ......_. .-... ... ..... .. .-.. -_
30-35 -1, 5 Very sandy limesto e22.9 1.62 4.20 8.8 123.21 41.4 45.39
35-40 -23.5 Sae 24.5 1.92 7.22 115.1 21.87 39.0 39.22
.-- ... .....-. I. . .. -._.
Note: Samples below 25' contjaminatedaccount c-vity.


I
DL -22

- .. ..- .... 5 "-- --- -.----- --.-... .. --'
0-3 20-17 **
13-5 17-15
-_ L--4.-.^j______ J __ __j., __ __ _
5-8 15-12 tVery s&dy limestone 28.29 0.60 o. .67 41.20 .60 26.02
i-- --1 I D i .______
8-10 12-10 Sandy limestone 32.79 0.36 0.2 1 .73 47.60 85.0 16.08
10-15 10-5 Sme 3.38 .24 0.65 1.36 48.35 86.4n 9.87
....5-. 5-0 3.-. ...... .
10 Soft, high c-ciu 43.56 0.20 0.49 1.03 54.78 97.80 '
-.. .. -.... .... .. ...... i _






LEVY COUNTY LOGS AND CHEM;ACAL ANALYSES Of SURFACE SAMPFLS

...-..---.....--. .... i-on .
Location Ignition Fe0 Caor
..---.



Sea. 19, T16S, R16E 46.6 0.22- 17.90 37.4 35.05 _62.6 26
I 1e ", I
1 0.,67-------- -- -+-
j SW'Sec. 21, T16S, R16E 46.2 0.96 718.74 39"2 :32.95 i5.8 0.67
-- "-. .6.7 9. 140,..- : 53.5 ...59.6 -o.16 '-
W Sec. 27, T16S, RISE 46.7 0.1 19.24 40.2 333 59.6 0.16 '













7?, ";: ..










outcrops reveal silicoous limestone. This condition continues westerly along

Highway 16A, through Crack)rtown and Yankoetown, whore shallow rock pits in-

dicete high calcium limestone.

Lack of good roads prevented drilling north of Yankeetown and Cracker-

town. There are several outcrops of high grade dolomitic boulders showing,

however, which are quite promising. Such outcrops were noted in Sections 19,

21 and 27, T16S, R16E.

Summarizing the results of the drilling program and investigation of

surface deposits in Levy County, it is ovi-ent that thM entire area bounded

by the ';accasassa River, St:to Highway 15, State Highway 16 A and the Gulf

of Mexico merits investigation. By no means is it to be inferred that the

rock of tho entire area nbove described is dolomitic, but there are at least

large deposits therein. A systematic plan of intensive prospecting would be

necessary to prove the thickness and extent of those deposits.


Citrus County

Dolomitic deposits in Citrus County are limited in extent. The Ocala

liaostono undorlijs the northern part of this county but in the southern part

of the county the Ccala is covered by the Suwannae limestone. Dolomitic lime-

stone has boun mined at Rod Lovol for about six years and it is the opinion of

tho writer that the only dolomitic limestone of potential commercial value in

the county occurs in this locality.

The first tect hole drilled in the county, Hole DC-1 was put down in

Sac. 14, T17S, R16E, on Highway 15 about 1.5 milos southeast of the Withlacoo-

choo Rivur bridGe at Inglis. This hole showed 7 feet of sand and 8 feet of

very siliceous linmstone. The hole was abandoned at a depth of 15 feet


- 62 -







































Insert "A"


L]DEND


R R Areas of


[-E-E Areas of


potential commercial value.



doubtful commercial value.


10 0 10 Miles


Dolomitic stations are represented by numerals.
Map of Citrus County showing dolomitic areas and locations of test wells.
-63 -








evidently being north of the dolontiic area.

Hole DC-2 was drilled in Sec. 24, T19S, R163, 1.2 milos north of Red

Level on State Highwy 1.5. This hole went through 5 feet of sand and 25 foot

of very siliceous limestcne. The depth of th3 hole is 30 feet and the sili-

conus lin stone indicates that the dololitic deposit does not 'extend f.r north

of Red Ljvel.

In order to determine the nature and extent of th3 deposit northeast

of R-d Lo-el, Hole DC-3 was drilled in Sec. 18, T17S, R173, along the old round

to the dam of the Florila Powv r Corporation on the Withlacoochee River. Five

fcut of u high :-rade dolomitic lirnstono was penetrated after passing through

15 fcot of send cvorburdon the magnesium carbonate content boing 37 per cent.

Below 20 feet the scdimont contained much less magnesium cerbonate so the hole

was stopped at 25 fout in a very siliceous limestone. Eyidently this hole is

near the limit of the doloitic deposit in a direction northeast of Red Level.

Holo DC-4 was drilled in Wi SEB Sac. 25, T17S, R16E, about 100 feet

west of tha pits of the Golden Dolomito Company at Red Level. Seven feet of

a low grade silicecus dolomitic limestone vws found after going through 3 feet

of s nd. B.lc-rl 10 f et an! to the complzt3d dopth at 50 foot the magnosium

c-rbonato contjrt increased, chcugh the material continued to be very silice-

ous. Tlis hr..le w-s either bdly contaminated with cravings or the deposit is

very irr.pular in this area, for a hif;h grade ncgnesium limestone is being

minded t thi cc.nany pits. Hich calcium limestone was exposed at the surface

about 300 feet ncrth (f this hole.

Holo DC-5 was put down in E SES Sec. 25, T17S, R16E, on the property

of the Gulf Dolomite Company ir.madiatcly adjoining the plant, .nd 125 feet


- 64 -








south. of the pit off the Golden Dolomite Company. This hole may have been

.contaminated as the analyses show only low grade magnesium limestone whereas

the Company is producing a high grade material.

Hole DC-6 was drilled in Sec. 30, T17S, R17E, on the Twonsend farm on

the south side of State-Highway 16, at a point 1 'miles east of Red Level. The

hole penetrated 5 feet of -sandy overburden, 5 feet of siliceous limestone, 10

feet of rather siliceous dolomitic limestone averaging 21 per cent magnesium

carbonate. The total depth of the hole is 20 feet.

In order to checkthe area between.Red Level and Crystal River, Hole

DC-7 was drilled in Sec. 31, T17S, R17E, on State Highway 15, l1 miles south

of Red Level. This hole went through 5 feet of sand, then into a low grade

limestone high in silica;. This continued with little change to 30 feet, the

bottom of the hole.

Hole DC-8 was put down in Sec. 8, T18S, 217E, on State Highway 15, at

a point 1- miles northwest of Crystal Rivor. Boulders of fairly high calcium

Slimestone were showing on the surface at this place.. This hole was drilled

30 feet through limestone, the loier ,portion being quite siliceous.

The results of the drilling above described, limits the dolomitic

limestone .area to a narrow zone around Red Level, perhaps about one mile wide

..north and south. A'lcw grade material probably runs northeasterly to the

Withl.coochee River, near the power dam. Because of the deep overburden there,

it would be expensive to mine. It is quite possible, that the dolomitic lime-

stone runs southwesterly from Red. Level toward the Gulf of Mexico. No drill-

,ing was done, as there were ino roads making it accessible.

S -.65 -.




CITRUS COUNTY-LtoEs OF TEST HOLF, AND CHEMICAL ANALYSES OF SAMPLES
ohLO &ii- -a M a'C0 Fsi-os
Deipth Elev. Char. of Material Iftn FB nSO 3f00 M sCO C; aO' CO 2



S.11. 5 Sand
O7- 10 i 5 iSandy, soft limestone i

10-151 Same 21'. 5 1.01 o 0.35 o.73 26.71 9 4?.69 9.14 i
..'.__ __ J _.._ I_____ "

o- -___- ........ ..... .....__ ....... .g .- .,-...
O-5 17--2 Caloareous sand 10.92 .11 0.39 0.82 12.00 21.43 74.331 '
'5-10 :12--7 Very sandy limestone 23. 76 1O.55 0. 51 1.06 28.73 51.28 45. 238
S10-15 7-2 i Sndy limestone 36.62 0.23 0.- 42 !0.88 ,45.82 81.90 15.89
5-0 Mud (avit.y) 1 l.08 13.12 1.19 2.48 l0. 66 19.O 72.4 6

--ud ( ty)

0-5 2 sand
5-10 23-18 Same
10-15 18-13 Same
15-20 13-8 Sandy do.oite 3 7. 56 1776 '71 3". 36.8 4.97







C ITRUS COUNTY


Depth Elev. Char. of Material


io s ni Fe23 O I Mo00 cIa
4gnit Io4 ". .MgCO03


I CO1CO3 0


DC-3 (Continued)


20-25 8-3 Very 0n y magne sum 14.6 0.84 549 11.5 9.5. 17.1 6.
3--
25-30 -2 Sand and lime :

3 -35 .7- same.


SDC-4


e T^5 7nd -

3 -6.5 lime 20.02 0. 75 1772 16.12 13.90 24.80
L '


..... Same


Same


19.44


25.94


Same.. 27.43
'",-


0.85


7.735


16.15-


.63 l. 21.73
S i'


0.52


1.1 723.35


13. 57.


1.t 07


19.2 5'


24 20'


4.' '34 .963


,.1 , .. .. ,
*." ,' ,' "ir "'
*. ', ,. ,
,i,
" .' : '.

' ,
* f.



.
....


57' 521


I w M ff -- -- ; ---- ; ----- ----- -- ----1---'------ n -I 1.* m _-_ __-- -- --- -- -^ ^ 4 ^ ^ ^ ^ ______ |_ J _.JL M r. -- -- M W
20-25..l.5-..,- .Same 533.4C 0.38 13.55 28.31 23.49 41.9o 28.41

5-o0 s ame 124.03 0.45 9.92 20.91 V 17.0. 50.36 48.:02

30355 2..55 Same 20.24" 0.34 9.71 20.39 14.42 25.72 55.46

55-4 "' sme 34.58 0.32 14.L 29.46 24.48 43.64 25.8
* 4 1**..


-- Same


31.63


0.26,


I12;8{: 26.77


0.29 I14.33
I-


22.42 l4'0nO


35.79


-i. *>c
- `-3.'5


1 5-20 i
-


-3*>'
- ,..""
r.' 8'.:


- ...


29.96


..Sa b


25.06


44.70 124.15


--- -----------------


---- -- --- ---- ----


---- I -~- ,,-


- ---


--- -r


------ --


I _.. .


L


.... ~


-- --


I -` -


-


'-- -- 1~


L- _-1__


r
1


`"


'i


I i2:, ,:1c),4
L,


: 5,-2 w
S=33'.5


I45-;-50 38 15





.C.TRUS COUNTY


jDepth Elev. Char. of Mat-rial tiotn 23. 150 1C 0 CaO [-CaC03 SiO2
1_____ | ___-_________ Iu.ni*iAy fl K. j 3.w,. '


OC-5


0-5 12-7 sand

5-10 7-2 Snd and loSy. .

10-15 -3 s e 'J. "L


15-201 -3


I Sf-nd, clay and liea


I
__________


D C-6

0-5 iJ s rSand --
~-- .------
5-10 7.5 Very sandy limestone

1-15 '.5 S.and magnlu i 11 e41.2 0.
15-20 -2.5 Sme 43.79 0.53


C -7


&


- --


.... j -


- --






CITRUS COUNTY

Depth Elev. Char. of Material ItS n Fe20g MS3 0 0 Cao o s i02
'a'I ~g~nition ~203 IM90 g I["0


DC-7 (Continued)


DC-8


Soft, gray IUe-i 42.a5 0j.7 0.83 L 73 53.55 95.56 2.48
Sandy limestone 35.42 0.30 0.54 .412 44.21 :78.88 19.29
Boft, grey limeston543.74 0.11 0.78 &.64 54.84 97.84 0.34
Sandy limestone 34.19 o.18 0.71 48 42.81 76.40 22.03
Sand limestone 0-


Same
Very sandy lime ston


36.29
e23.27


0.20
0.96


0.65
3.07


L.36 45.50
6,42 24.63


21.20
43.96


17.28
47.42





| .































Area of doubtful commercial value.


Dolomitic stations nre r3-reoented by the letter
"D" followed by a numeral.

Gravel stations aro reprosontod by.the letter
"G" follav od by a numeral.


10 0 10 Miles
.' 7 TL rr-F TT.Tl -T-T.. .. ........... r


Map of Pasco County showing dolomitic area and locations of test wells.


- 70 -


VFI







SPasco County

Most of Plsoo County .is underlaid:with Tampa limestone. The only

part of the county thought to have possibilities of :ddlomitic limestone was

arcund New Port Richoy where.its occurrence had been reported.

SAs a starting point for the investigation in Pasco County, the rock

pit operated by L. F. Fernald, Tarpon Springs, about i-1 miles southwest of

New Port Richey, in the SEA Sec..7, T26S-, R16E, was selected. This pit show-

ed hard gray lim~stono boulders near the surface, overlying a mottled gray

and brown limestone. Hole DP-l'was drilled bout 200 foet south of the pit,

and showed 10 feet of sand overburden, then hard grny limestone high in silica

content. This material became somewhat softer and loss siliceous at 20 feet.

From that point to a depth of 35 feet, the quality-of the limestone improved,

reaching 95 per cent calcium carbonate. B.ulow that depth, there was little

change to the bottom of thehol art- 50 feet.

For the purpose of testin; the area between the F3rnaI.d pit and the

Gulf of Mexico, Hole DP-2 wos put down in Seo 7, T2GS, R16E, along the edge

of the marsh in NW Sec. 7, T26S, RISE. The hole went through 6 feet of sand

and 24 feet of hard siliceous dolomiitic. limestone, the magnesium carbonate

content averaging 23 per cent. Below 10 feet, the magnesium carbonate de-

creased rapidly to 30 feet, the bottom of the hole. The results from this

:hole together with surface samples 'of so-called-travertine from the proper-

ties of R. Werner and H. B'. DeBoor, in Sec. 6, T26S, R16E, show a narrow

dolomitic limestone area along'the-marsh. This hard.material takes a good

-polish and has been tostedifor.building stone with good results. As most of

.this rock lies belowwater l'veal, pumi ng would be a problem. The presence

of joints and fissures would imake.the manufacture of large blocks difficult.




71 .





PASCO COUNTY LC OF TST hOLES AND C tMICAL ANALYSES OF SAMPLES
e'-h J o I ,2 jo
Depth Elev. Char. of Material- jI niton h2 3 o0 9 & 03 I Ca c so10 i

DP-I

0-5 7.5- Sand
5-10 Se nd
2.5 i i
10-15 Herd, sandy limestone 30.3 ,0.56 1.00 2.1 34.70 62.0 27.9
15-20 .5- Same 35.4 0.76 0.30 0.6 42 49 i 75.8 8'1.7
-225 1 5 l5 -e stone 38 .1 n42- ;.48 1.0 147.65 85.1 11.28i
25 -30 5 Sne 39. 0.34 0.22 0.45 49 0
30-35 Same 39.0 0.44 :0 75 1. 6 48.33 86.3 9.96
-27.5
35-40 -7.5 M .edium hard lime.sond 42.1 :1.2 53.30 95.2 2. 9
35-40 .-.5 ..... -- a. .
40-45 "Sa=e 42.7 -5.1
40-45 sa. e i42.7 0.20 0.49 1.0 53.63 595.8 2.57
-- -- --- ~ -- --- -------+-----
45-50 5- Seine ~ 42.4 0.18 0.54 1i1 53l -.50 95.6 2.66
.. _L[_ _._ ___ ______

SOP- l

iO-6 5 Sand
-O-6-- 5" :"- ---.n ,,---.-.--.- .. "
16-10 <25 ir2. 123 !43.,3 131.71
610 Hrd s andy ma enacjiu 30.7 .6 11.2 02 .0 24.22 .3 .07


15-20 5 sae 5.6 0.52 1.93 4.0 42.02 75.0 17.66j
-1 .5





PASCO COUNTY
-o. .. ,---s -I -o- --o a_
LDepth Elev. Char. of Material otn P0 6 $ CaO aO3so2

0p-2 (Ocnti u5d)

20 -20.5 Same 32.6 1.05 1.52 3.2 37.98 67.8 21.9
25-3.0 -k. 5
-25.5 Same 40.0 .42 1.36 2.8 48.90 87.3 7.2

D D ..... -3

S5 b .S.ar9id
5-0 -65 Soft, sandy gray lime 39.5 .66 o0.64 1.3 46.41 .9 32.1
0L-14 -1.5 Same .1 0.50 0.32 06750.03 94 6.7
-10 4 .0r 27 .40
4-15 lime 0.1 i 0.72 +0.97 R2.0 5.82 64.0 27.
,- -i-'----------- .._


DP-4




S PASCO COUNTY LOGS OF TEST HCLES AND CHihICAI. ANALYSES OF SAMPLES
--- .. -..Ls...e0. s.. 1 onCO Fe o- CaO ].DO, i S i
.VDepth Elev. Chr. of Material Ignittion 2 3 co Si3

i- --. 1............ ... ,- -r-- \, e,. -2

0-5 12-7 Sand



15-20 Same .
I
S20-25 ; .. Same
425-30 -18 3


..-2
-2S j ,~a 3~.- rC : ,' -

0-5 S'-3 I n
'5-10 ae ame
-___ __ __ .. --...... .
1-12 Sand and limestone 6Tbt A4ilyzed
-4 _- _
12-15 j Sandy limestone
15-20 Same "
i.-= t _12






PASCO COUNTY


Depth Elev. Char. of Material s on Fe2 8 O CaO Ca 0 Si02
Sa ______ Inition 3

GP -3

85-
0-5 Sand

5-10 1.i 5 Same
10-12 -1. 5- Send and limeetone N Anal '-
12- 35 0No" Anal Mzeduc ) .
12-30 Mud (cavity) : ,
-21. J (~iviy)


G P -4 I ~


i e.
CC~t;e: ~:
Ip1~4 I~ .


GP -4


'"'


.I .










This very siliooous dolonito should by auitablo for the manufaoturo of rook

wool.

In ordor to t,,t th, area north of Port Richoy, Holo DP-3 was drill-

ud in S'4 Soc. 20, T;'2, RYI', ,.o!,g Salt 3pring Tyou about 1 milo west of

U. S. Highway 19,. This hole showed only nueativo results as far as dolomitio

limJstono is concerned. BDl3..w 5 f(ot of sand, a silicoous limestone was on-

countorod, which continued to 25 i'oot, tho bottom of the holo.

Holo DP-4 wis put down on tho road running north from Fivay about (

mile from U. S. HIrghwvy 19, This holu was stoppod as unpromising at 15 foot,

aftor going through sand all the way.

An investigation of outcrops along tho Gulf from Now Port Riohoy to

Hudson and beyond showocl no indi.crtion of dolomito. Most of the outcropping

rook is limostonu end allicifid .im.stone, showing the offects of wcathering.

The Pnalyses of sevocil surface strrples, taken from widely separated locali-

ties, confirm opinions stated above.


Manatoe County

Dolomiti limeslones have boon mind by small operators in Manatee

County fur several years. Moat of this material has been crushed and used

for air;roato. In some cases the fine rmtorial obt iined from screening has

beon sold for agricultural lirmetone. A plant known as the Florida Trnver-

tine Compnny, Bradonton, was erected 2 miles east of Samoset in about '1922

for tho mining end manufaoturo of building stone. Tho rook quarried for this

purpose was a rather thin bed of hard silioooua dolomitio limestone known

locally as travertine, howdvor, it is not true tkavortino but more properly

trsvartine-liko. This plant has lone since boon abandoned. The building


C 96 -








occupied by the Tampa Gas Company, Tampa, Florida is constructed of this ma-

terial.

Preliminary investigation of outcrops and rock pits by the writer,

indicates that dolomitic rock occurs over much of the western part of Manatoo

County. It was noted that most of these deposits occur in low lying hammocks

and that they rarely extend to higher ground.

Drilling in this county was begun at Oneco. Hole DM-1 was put down

in SVW Sec. 7, T35S, R1i8, a short distance southeast of a small pit operated

by E. F. Staples. This hole is outside the hammock areas. Upon penetrating

19 foot of sand a low -.rado dolomitic limestone was found. This limestone

quickly improved in quality and betwoon 20 and 30 feet, the magnesium carbon-

ate content was 36 per cent, although it was high in silica. Below 30 foot,

the quality of dolomitic material decreased rapidly, due to increase in silica,

so tho hole was stopped at 40 foot.

Hole DM-11 was drilled in SIW Soc. 8, T35S, R18E, 1 miles Oast of

Oneco on ant. old county road 1 milo north of State Hir.'hway 18A, but proved

disappointing. A low grade extremely siliceous dolomite was entered after

passing through 10 feJt of sand. This continued with little change to 30

feet whore the hole was abandoned,

In order to investigate the section northeast of Oneco in the direc-

tion of Elwood Pork, Hole DM-2 was drilled in the SW1 Sec. 5, T35S, R18E, on

on old county road. This hole wont through 9 feet of sandy overburden, then

into a mAdium grade dolomitic limistono which continued to 40 feet, the bot-

.tom of the hole. The average magnesium carbonate content for the limestone

Mas 32 per cent, but the samples were high in silica.

Hole DM-3 was drilled in NE4 Sec. 5, T35S, R18E, at the simll rock









pit of N. J. Trudoll, li miles onast of Smnoset. This location is about *

milo northwest of tho old plint of tho Florida Travortino Company. A sili-

cooua low grndo dolomltic limestone w::s ponotrcttod to a depth of 5 foot and

a medium grndo dolomitic limestone to 40 foot, tho bottom of the hole. The

nvorap, mcgnsilum carboncte content was 35 per cent, howovor, the samples ran

high in silica.

Iolo DM-4 was put down in SWI Soo. 38, T34S, R16E, at a small rock

pit opkratjd by E. F. Stnplos. This hole shoevod 10 feat of sand, and then

onturod a medium grdeo of dolomiittc limatono which avoragod 34 pur cent mag-

nosium c-rbonnto. This frrmtion continued to a depth of 40 fueot at which

point the holo was nbndond, beccuos this doeth was conoidorod to bo below

tho limits for cormnurci'l mining. Saurface investigations and author borings

showed the dolomilic doposit to oxtond northo etorly to the Brddon River.

IHolo aDM-1 w,.s drilled in NE Suc. 6, T35S, R18E, on a county road

1 mile oast of Somosot. The first 6 foot was sand, blow which 4 foet o.f

low gr do dolomito ws found. Fairly good rock was entered at 10 foot which

continued to 25 foot, the bottom of tho hole, and probably extends doopor.

Th; wv-rngo n-enoaium c'irbonc-te content for tho 15 ftct of limestone was 34

p'-r cent.

As a result of the drilling of holes DM-2, DM-3, DM-4 and DM-12, it

is estimated that there nre 40,000,000 tons of siliceous dolomitic limestone

nvjraing 34 per cent mianasium cerbonato available for mining in the vicinity

of these test holes.

Hole DM-5 was drilled in SW. Sec. 24, T35S, R17E, at the southeast

corner of the Sarasota Day Country Club, near the head of Bowles Creek. A
**


- 78-









very siliceous low grade dolomitic limestone was entered after drilling

through 5 foot of s'nd. This ritnstone continued to a depth of 35 feet,

with an overage magnesium cnrbonato content of 21 per cent. A higher"grnde

of rock was encountered between 35 and 40 foot which showed a magnesium car-

bonate co te t 6f 36 por cont.

Hole DM-10 was put down in S14 Sec. 19, T3SS, R18E, along the Old

Bradenton Road, about 1~ miles north of Tallevast. The purpose of this hole

was to determine whether the deposit at Onoco and the one on the south side

of the Manateo-Sarasota County line wore continuous. The hole wont through

20 feet of sand' ovorburden, and then entered a very siliceous low grodo lime-

stone, however',which would indicate that those deposits are not continuous.

This conclusion is further substantiated by surface investigation and hand

auger borings through this section.

In order to invostigaot tho aren on the east side of the Braden

River, Hole DM-13 was dril.ed in NWm Soc. 28, T34S, Ri8E, on State Highway

161, about 1 mile east of the river. This hole went through 10 feet of sand

and then entered a sandy shell marl which continued to a depth of 20 foot.

The holo was abandoned at this point as unpromising.

IHolo 'h-14 was put down in Sec. 27, T34S, R18E, about 3 miles east

of the Bradon River on'State Highway 161. Results obtained were similar to

those found in Hole DM-13. A vory sandy sholl'marl wes encountered after go-

ing through 10 foot of' sind. Thoro was little change in formation to the bot-

tom of the hole at 30 foot.

The results from aoies DM-13 and ..I-14 together with an examination

of outcrops ind'ioate that thoero is littlel or no dolomitic limestone on the


79 -








east sid, of.Bradon River.

Work was then begun on the north sidq of the Mnnatoo River. Several

small pits woro examined which showed dolomitic limestone, as did nlso some

s.rnll canals and re v'sifdo ditches.

Drilling was begun a short distanoo east of the Soaboard Air Lino

ARilwuy Lridge, between Palmetto amn Ellonton, and about 100 foot north of the

rivor at a smnll pit on the Asa Pillsbury tr.ct, operated by Sam Johnson, in

the N'1V Sc. 24, T34S, R17E, whero !1olo C.1-6 was put down. Sand overburdon in

this holo wcts 4 fuot thick. A siliceous lolomitic rock was entered at that

dppth. This quickly chr.rnod to a medium grdo dolomitic limestone which avor-

agd 34 por cent mngn3sium carbonate, although it :as quite high in silica.

This formation coutinuod with little chango to 40 foot, the bottom of tho hole,

O;copt that it bjcume softer as drilling progressed.

BDaod on the results from this tost boring end on surface investiga-

ttons in surrounding territory, it is boliovod th.t a fairly good dolomitio

limuatono aroe libs on3t ~tnd north of this hole along the Manatoe River. Dol-

omitic lim~stono outcrops at intervals along the north bnnk of the river up-

strmrJa from Hole DM-6 for about 4 miles, as frr as Rocky Bluff, however, much

of this sootion lies in settled country occunlod by citrus groves and truck

.g"rdons. Also, tho dolomitic rock is thin toward tho oestorn limits. A block

running vssterly from Holo DM-6, perhaps a mile long and. oxtonding northerly

olcut mile should be nviilnblo for mining operations. As this siotion lies

in lcw Ir.nd along tho MHnatuo Riyer, it would be necessary to limit mining

onorOtions to the upper pnrt of tho dolomitic bed.

Continuing investigations north of the lManatoo River, Holo DM-? was


- 80 -









'driUiid in S' 80jo. 12, T34S, R17E, cn the property of Mi F. Hayes, at a small

pit oporatod by E. F. Staples. This holo entored a low graeo dolomitic limo-

stono at :1 feet, which continue with little change to 10 foot. The average

nmgnOsium cnrbonr.tb content w.s 24 per cont, n.. the silica content was very

high. The magnesium cnrbonato content was ccnsidarnbly loss, belcw 10 foot

docr,.srhig tc6 the bottom of the hole, a depth of 25 foot.

Holo DM-8 whs put down in'SE- Soc. 7, T34S,' RI18E, on the Satterwhito

property, no"'r an hb"ndcnel pit whoro the rock was at rno time qu-:rried for

building stono. A medium gr ado cf lolomitio lirmstone was encountered after

gcing through 5 foot rf 'sndi, which showed an nvbrago m.gnosiuim carbonate con-

tent of 30 per cent to a depth of 15 feet, Below this depth, the grade of ma-

terial dropped slightly and was softer. The hole was discontinued at 25 feet.

The rock is very siliceous as it is in other holes in Manatee County.

For the purpose of determining the northern limits of the dolomitic

area, Hole Dlt-9 was drilled in SW' Sec. 6, T34S, R18E, on a county road locat-

ed on the south side of the Ellentoh Airport. This hole was located near the

east edge of tho hammock section, because tho ground rises sharply in an easter-

"ly dirootion to an elevation of 36 feot, which i high for that part of Manatoo

County. This hole showed 5 feootof sand, 7 feet of very siliceous limestone,

and 8 foot of vory low rdado dol6mitic limestone which average 18 per cont

magnesium carbonate. Tho holo was ab-.ndbnod as unpromising at 20 foot. The

low grade rock in this hole indichtod thant this location was beyond the area

of pot~itial commercial doiomitic limestone and no drilling was undertaken far-

thor north. i

Si nob o'of'thf ch'if bbjocts of this survey w-s to define approxi-

mate limits of the dolomite deposit, no drilling wcs iUnotakohl inside the


- 81 -






estimated aroa. Much surfaco invostigr.tion wns mado, how9vor, including the

collection of samples from opo.su.'es nnd considerable hand augor work. A sam-

ple of thj hard "Hravortino' from tha pit of the Producors Rock nnd Limo Com-

pony showed a magnesium carboIw-to content of 38 por cent. Other samples

colluctjd woro similar in quality.

It is quite possible that there are other small, isolated dolomitic

areas in Manatee County, but considerable preliminary investigation indicates

that the drillirn above described, covers the more promising areas. A large

ac.eas~e of land along Sarasota Bay, south of State Highway 18A, and west of

U. S. Highway 41 had been reported to show dolomite. No such material, however,

was found. Shell limestone outcrops along U. S. Highway 41, in Sec, 11, T35S,

R17E, and in many localities to the west. A hard siliceous limestone outcrops

along State Highway 18A at various points, also in many places south of.this

road.

Somr outcrops had been reported along Frog Creek where it crosses

State Highway 310 farther dcwnstroam, but no such outcrops were found, in fact,

little rock of any kind shows. This section is comparatively high sandy land.

At the Piney Point landing of tho Bee Line Ferry a pile of rock thrown

out of the channel during drudging operations showed dolomitio material, A

sample of this rook when analyzed showed a magnesium carbonate content of 34

p;jr count. Doubtless a narrow deposit oxtonds along the shoro lino at that point

but it probably docs not extend far inland. This area was not prospootqd.

A dolomitic limnstono deposit in the oxtromo northern part of Sarasota

County east of Stuto Highway 356, is thought not to cross into Manatee County

as sholl limestono is found along thu county line road, with little evidence

of dolomitic linmstono.


- 82 -


































Areas of potential
Commercial value.


Areas of doubtful
S commercial value.


Dolomitic stations are represented by numerals.

10 0 10 Miles
o Manae Cny s ing d are a









Map o'f Manatee County showing dolomitic areas and locations .of test wells.


-83 -


/




: MANATEE COUNTY -- LOGS OF TEST HOLES AND CHEMICAL \NALYSES Of SAMPLES

: 2 0... i. i on 2 MGC03 ;cao cOaCO3 S
Deoth Elev. char. of. Mterial it0on, 0 0



.0-5 an
.-.. ..n, ..... .....^ i" .~... 1 ,- .J .---- -.-.-*-- -.:
1 5
5-1 i Same
... 5- ..
10-15 17.5 -- .- -.

19---20 V.-.-.. 25.V1 20. 11.48 '.24.0 I16.67 30o, 1 4. 22
1 .. m e.esl. um lime .. .. .. ... .... .... ..
20-*25 .-2 Sandy dolomite 33.3 0.65 17.45 | 6.5 25.98 46.3 15.43 ,
1. ,. '" ..5 .. . ,. ... .. ; ... .. -.-
25 30" SS ,e 38.6 0. 66 1 7. 1- '.666.4 26.20 46.8 14. 7
44 T----4---T.
n35y an190 0.5 8 17.7 13.76 2.6 55.913
.... .........' ....... .......................... . ........4...............--4
3S 3 1 -7'' Calcareous sand 4.7 0.34 2.02 4.2 3.45.6 88.
L- I.5 -__,____ ___ ...___--
DM -2

0-5 12---7 Srd '
L5-9 17-3 S !
9-10 3-2 Sqndly doloirite 33.2 0.69 14. 86 3 1.1 -24.051 42.9 24.49
'1C-15- S,= : -4.0 14.S 9.7 3 50.3 17.91x
15-20 ... .0 75 47.7 20.42
15To-7 (""SWnme 53. "^^T To.&D i .^'.O.e' j^ ,4.J242







MANATEE: COUNTY


Depth ev. Ch ;'a of o MIaterial Iet" 0 ,C.' 23 I1 OO O 8'i
oto ,o ..


DM-2 (Contlnued):


Same


Sandy dolomite


33.2

32.0


0.59

0.53


L5.07

-14.59


51.5

30.5


5. 97 46.4

'5.63 45.'8


21.95


30-35 -23 Same 34.9 ,0.45 17.55 36.7 26.48 47.3 17. 853

3540 o S23me 34.7 10.51 15..88- 33,.2 26.75 47.7 86
S' .. .. ... J' ..... ....... _


: . .. .. ... ':* .- 1 ,-- * t ; ,.,
DM-3


0,.5 .. -",: ...e. I .e-siul-ime 21.8 2.60 6.23 13.0 23.40- 1.8 6.,40.
5__ !0-0 e23' lim 20

5- i .72~2 rd ote '36.4 0.64 15.87 33.2 2748 .49.0 6.27,

S5....- ~g rde.lomte 39.0 0 47 1.68 7.0 28-30 :50.- : 12--1

12;: 0 ge 34'.5 0O56 15.76 1 33.- 26.42 47 2 8.74

2 '2 Sme. 4. 0 15.81 3.1 26 09 6.6.. 19.22
.'P :- "".^O ".' .. .. I a, ... .a. : I .... 7 7"- -
S' e .. 374.4 I49 -11.- 36i;* 27. 31; 48.7 -14.54

S- Same 38.9 0.41 17.95 37.5 27.75 4935 12.10
-3 .-


35 240- -
'. ^^ j


20-25

25-30


-0.
-13

-18


',V





i ': :.
,. I
' '


i r. ~~r-rr~l. ~-rr-r--r *r-----r~- -I


- r~-~rrr~


S I


i

CI~ .L+ -~ ~ I
;
j
:I


i




'~ '
: ~,:
i





:
I:.
:

,, 1



~~ ~


;


35.3,


0 ,27.75 49.5 5.66 ....


a'LC~ .~


16.-25


54.





MANATEE COUNTY

epth. Elev.. Char. of Material 0i OflFe0 O n0 CO0 CaO ICaCO s10o
. ... t. .
ER -g., 2


DM-4


Sand


I


10 8-3 Same

10-15 3- and oed ..te 34.3 0.61 15.24 31 9 28.03 50.1 16.42

5-20ame 33.0 0.67 14-.55 30.4 29.13 52.0 16.60
""-i
=0-25 -12 Seme 37.0 0.49 16.66 34.8 29.41 52.5 12.27
25-30 .. 7 Sam 35.7 0.51 16.40 34.3 27.80 49.6 15.10
r 7f -- -- ....1


Same
-SGrdy dclgho-
rde dolomite


38.9


!0.43


16.43


o.42


34.3


29.46


142. 6
a


38.6 29.33 J42.4


9.03


U.


13-8


1:'
I"
.,P~3
~: C I
rr 'T


LICII~I L


S8.14


--


I


_ I10.42


''~ ''


'"' '
I


5--tio


16.45


40.o0






M ANATEE COUNTY .

Septh, I Eii v.' Char. of' Material FLo 20 3 'Fe0 0


DM -5 (Continued)


30-35 -205,
25
35-40 1


SSame


S 16.7


Ianay 3 1
.hi gh grade dolomit 38.1t
--I .


1.64 .6.76 14.1:
0.83 17.50 .36.6


7.29, [13.0- [61.27 1


23.65


42.2 14.22


DM-6


4-5 1-0 magnesiuz lime 27.2 0.90. 2.15 25.4 17.97 32.1 -38-.59
very slanciy 7 _
5-10 0".-5 medium g .e dloimi;e34.5 .0.68 15.75 35.9 22.98 410 23-35
5 '9
10-15 ,10. Same 35. 0.70 16.18:. 33.8: 25.09. 44.8 1 7.93 -
5-20 1. Same .4.1 3. 0.58 15.52:- 32.4 24.30 43.4- 21.05
2025 ... -" Same 3'6.0 0.. 45 .16. 57 34.. 6 25. 70 .45.. .. .6.58.
-20
25-.30 h grade dolomit 39.2 0.48 17.41 .36.4 28.20 50.3 9.24
30b-35- .- Same... .38.1 .0.64 16.85 .35.2 27.02 48.2 .12.33

35-40 j- Same 38.2. 0,64 17.50 36.6 25.85 46.1 .12.5.
,3 16, 2 -8 .. ,,

.. .. D M -7 .


o- ~L


5-1 Sand--- ---- --~- -


~..~?~
~r:i~
I''~
'~~: ~h*1:.Y~5
..;

'


- ii I


i


5-1


Sand





S MANATEE COUNTY


Depth Elev. Char. of Material nifion Fe-2 3 M[ I [sc03 OaU Ca03 _10


.- DMM -7 (Continued)


0.89


5-0 .12..6.5 Same 27:2 0.76 11.62 24.3 20.87- 37.2 35.95
10-15 8.5-3.5 same 17.1 1.06 8.03 16.8 i1.76 21.0. .63

15-20 3-5 Same 13.3 1.57 6.29 13.1 6.38 11.4 68.663
20-25 _6 5 Same 13.4 1.58 6.00 12.5 6.66 11.9 68.53
2- ______256

rM-8

0i-5 'I5 End i

15-10 n55 }iaesium lime 31.3 n.70 13.98 29.2 23.40 41.8 26.61

1-3-15 .2y doldlte Dt e 15.02 31.4 ?P.52 40. 25.65


manesyum le
.magnesium lime


a.j- A- Aj
m.rnesium line
Same


26.1


25.1


1.30


1.22


13.18 27.5

12. 9 26.5


16.65 29.7


16.20


28.9


38.06

40.22


15-201 4.5-
0-. 5
20-2 =0b5-.5


_ __ __ r


-- -- ---


i


r" ~"' '~" "'''~' "''"'~' ''"'''"'
r


Ei-5 i3.5-12
p 1 1- 1** .i '


29.6


11.92


28.85


24.9


24.30 43.4






MANATEE COUNTY


i p,- t Elev', .er. of Material j Ini on 2


DM-9 (Continued)
/ .


12i1 8.5- "Very sany 19,a
S8. Manesieum lime 19

15-20 5 ame 21.8
-U I 0.


1.20


7.86


P.6.4(


1.02 j9.72 20.3


15.42


17.57


7. 5 50.32:I-
'51.4'. 4.466


D DM 10..


0-5 17-12 Sand
.: Sal. ; S.,
5.2 7 j "l sa .me -


.. 15m20 '.. .Same
"3 1


*20, 2


8 Same


OM-II


5,- 29-24 Sand-
5-10 24-19 Same

10-15 19-14 Calocreous sesand 9.6 1.89 3.95 8.3 8.52 15.2 71'16

:15-20' 19 serys u magne- 16.1 0 .62 6.84 4: .3 13.90 .24.8 58.58
20-25 9-4 Same 14.8 0.58 6.70 14.2 13545 24.0 6b.88
I ___


.T.mO.. CaCO ..SiO ,
3- MgC3 ., .


,16.4 ,.


------ --------- -- ------ -r --- --- ---- -- --------


rrrrC-


-------


. I..., "





MANDATE E


epth. Elev. C har.


of Material isgton lt Fe2


COUNTY


DM-I I (Continued)


VI-30 I


Same


15.9


0j.54 1 6.77 i14.3 p3.56
i_.__... L_ __-


124.2 I58.13-
_i l _


DM 12


Sand

Sandy mfneoium


ery sandyme
magnesium lime


32.4 0.88 13.55 28.3 24.27


17.9 0.98


7.22


j15.1 114.12


ead 35.1 10.70 15.17 131.7 26.57
--, -+-- .-f.- -
S37.7 0.70 16.74 35.0 5. 97

S37.7 0.74 16.85 35.2 7.38


25.2.


47.4

46.3-


148.9


DM -13


apody.Vedium gr.

Same.

Same


43.3 24.57


55.28


17.81

15.73


- -


---------~--;_ -e -f.- I-


r I I -~-- -I --


--------r~-_- -_ --


3ll~-LI ---- -CI -.UL-- L~-~C~~LIIII-'~~ C~-C-I- --Cl-~-LLIIII ~C


--- --- ~----~- ---- --- --C-- -'lr---- .~_--- ~_~_~ ____~_


I


I '


--Ll*_ i _~__ II


--


_ ____ __ I T


~r


__ ____ ... ~-___


L'~'4


f.i T 8 0
1. .3 .. ....


f
'








MANATE.E COUNTY


pt E.ev Lesson .Fe 0 -
SDepth Elev*, Char.j of MIterial, I nit ioen" ,2 3



SDM 13(Continued)


Sg03CO3 CaO


SSume II


.I.ti .1
I! I,
*1.~


':1


DM-


j.


: Marl.


vlv


0-5 135-8.: Sand.

5-0; 8 : Same '


1: I1..,,: Se.nd and' shell inLr


*. -- -_ :_
1_9_ _S_ ame_


20-25j ~M2 arl

-2530, same.
7- ":: Same : ; ; :".,


I

C .
'



r



00c3 :' 1.,sio
io


1~"-- -~~- I -~


7


-- ;- -~---- -- -- ------ .C--T-.--~-~~- "


--- -- --111' --L --


-L-


----L-


*II r
? .
''


3' "'",







* '


















,, ,'


*


:I



''


I


'' "'
''


.?
i.
1
' rl
"'

I

..


.








It is quito probable that a small deposit of dolomitic limestone runs

southwesterly from near the head of Bowlas's Crook in Sec. 24, T35S, R17E. As

all of this area lies either in hitfield Estates subdivision or in the Sarasota

Bay Country Club, no further drilling was attempted there after Hole 3M-5 was

finished, as very little, if any, land would be available for commercial dovel-

opment.

Summarizing the results of the dolomite investigation in Manateo

County, it was found that there is no continuity of the deposits. The largest

areas are adjacent to the Manateoo River, on both the north and south sides.

Much of the town of Manatee is probably underlaid with dolomitic limestone, be-

ing e continuation of the deposit near Samosot and Elwood Park. The deposit at

Onrco is apparently quite local as it do-s not extend far in any direction,

except possibly northjestorly. There is a possibility that a narrow zone ex-

tcnds northofsterly toward the Snmosot-Elwood Park area, but this is doubtful

anid could cnly be dotorminod by intensive prosnocting.

.,'hile the county has somo dolomite deposits of quite high magnesium

carbonate contest, all are quite siliceous in char: ctor. This fact would make

them undesirrblo for mrYny purposes, but the high silica content should make

theje adposits adaptable for the manufacture of rock wool.


Snrasota County

Dolomitic limestone has boon mind in Sarasota County for about 5 years

by the Florida Dolomite Company, the manufactured product being used for agri-

cultural limestone. This plant is located about 45 miles northeast of the City

of Sarr.sota in N, Sec. 6, T363, R18E, and is the only one in the county mining

dolomitic limestone.


- 92 -










Hole DS-1 was drilloedon the south side of the Florida Dolomite

Company pit., The shallow. saind.overburden near the site of this test hole ran

from 2 to 4.feet.thick. The holo started in high grade dolomitic limestone,

the magnesium carbonate content -averaged above 38 per cent. Below 15 feet to

a depth of 25 feet there was a slight drop in the magnesium carbonate content,

the average was 34 per cent. The quality of magnesium carbonate averaged 28

par cent .from 25. to 35 feet, the bottom cf the hole, and tho amount of silica

increased with depth., .

Hole DS-2.was put down on the. nrth side of the pit. .The overburden

in the vicinity of this hole., as on the south side of the pit which averaged

from 2 to 4. feet in thickness had been. previously stripped. The hole showed

a very high grade of dolomitic limestone. from the surface .to. a depth of 20 feet.

The magnesium carbonate content for this thickness isns mere than 39 per cent.

Below 20.feet, thc- quality cof rock decreased somewhat, due to. an increase in

silica and showed an av.rego content of 28 per cent iagnesium.carbonate.. The

hole was abandoned at 40..feet.. This pit is near tho western limit of tho dolo-

mitic limestone area, as a deep.ditch along tho- west side of State-Highway 356,

on.th. property of the Sarasota-Bradenton Air Bass, dces not. show any. exposure.

..Hole DS-3.was, drilled in SW- Sec. 7, T36S,.R18E, on Sast 45th Street.

of the. City of, Sarasota., a short distance east .of State Highway .356 in a thinly

developed section near the. northeastern: limits of the. ci-ty. The :sand overbur-

den here.was 5 feet thickk, below, which there was. 15 feet of very siliceous: low

grade- dolomit:ic limestone :The hole twas discontinued at.. a depth of 20 feet as.

unpromising.

S...Hole DS-8 was drilled in:SE. in Soc.. ?, T35S, R18E, about. 500 feet


- 93 -









north of 33rd Street napr the school nt New Town, a colored subdivision of the

City of Sarpsota. The hole penotrnted 8 foot of sand overburden, 2 feet of

low grrde dolomitic limestone .and 10 feet of medium grade dolomitic limestone

which overnged 35 per cent magnasium carbonate. The test hole was completed

at a depth of 20 feet.

An ox.minntion of exposures along the drainage canal running south-

westerly to Sarnsotn Bay from the northeastern pirt of the city showed dolomi-

tic material in several places. A surface sample from this canal where it

crossass Orange Avenue contained 40 per cent magnosium carbonate. A sample of

soft rock exposed at the mouth of Hog Crook on Sarnsota Bay, showed a mwgnosium

o-rbonato content of 36 por cent, however, no drilling was undertaken as very

little of this section would be available for mining.

Holo DS-4 was drilled in NW., Soc. 5, T36S, R18E, on the DeSoto Road

bout 300 foot east of the Atlantic Coast Line Railro'ad. A good grade of dolo-

mitic limnstono was encountorod after going through five feet of sand. This

lii-stone continued to a depth of 20 feet with an average magonsium carbonrto

content nbovo.37 per cont. As is the caso throughout Snraosta and Manatee

Counties the rock is quito siliceous. Below 20 foot the quality of material

dropped rnpidly and tho hole was stonpod at 40 foot. The lower 20 foot of this

hole averaged 24 per cent magnosium cerbonate. It was reported to the writer

th-t about 70 acras of land in the locality of this hole wns prospected quite

thoroughly a few yaors ago with good results. Several old test pits were

observed and one surface sample collactod from one of those showed a magnesium

carbonate content of 40.85 per cent.

Some preliminary investigations woro made south of the City of Sarasota


-.94 -









to determine the possibilities of dolomiic limestone in that direction. A

surface sample was coelloctd in 3-c. 17, T378, EI8E, at a small abandoned rock

pit on the south fork of Ph'.il.tppi Crook which showed a magnesium carbonate con-

tent of 33 per cent. A sample tr.akn :in Soc. 21, T37S, R18E, at Pinehurst Park

Spring on U. S. Highway 41, 8 milos southeast of Sarasota contained 23 per cent

magnosium carbonate. These samples indicate the possibilities of dolomitic

deposits of some vwlue. As indications wore less favorable thnn in parts des-

cribed above and much of the land would be unavailable for mining, no drilling

was done.

Tho matorinl arnalyzod from this nrea -is too high in silica to be of

commercial vluo, axcopt for the manufacture of rock wool. Anyone interested

in this might do some intonsivo prospecting. It is believed that no dolomitic

material occurs south of the localities abovo montionod, as a hard silicified

limestone was observed at Venice.

Suimmnrizing results of the work in Sarasota County, it is the conclu-

sion of the writer thnt the best available dolomitic deposits are limited to a

rather small territory north and erst of the City of .Sarsota. As.montioned

previously, much of tho dolomitic area lies within the city, and is-therefore

unavailable for mining.

.Probably the most promising nart of this deposit is that extending

north from the DoSoto Road almost to the Manatoo County line, and from the

Atlantic Coast Line Railroad oast about ( mile. This does nat include tho

high grado deposit of the Florida Dolomite Cormpany which lies wost of the

Atlantic Coast Line Railroad. A larger part of this area, probably not quite

as high in magnesium carbonate content, extends from the DeSoto Road south to


- 95 -