Radon potential study, Alachua County Florida : near-surface stratigraphy and results of drilling ( FGS: Open file report 41 )

STATE OF FLORIDA
DEPARTMENT OF NATURAL RESOURCES
Tom Gardner, Executive Director

DIVISION OF RESOURCE MANAGEMENT
Jeremy A. Craft, Director

FLORIDA GEOLOGICAL SURVEY
Walter Schmidt, State Geologist and Chief

OPEN FILE REPORT NO. 41

RADON POTENTIAL STUDY, ALACHUA COUNTY FLORIDA:
NEAR-SURFACE STRATIGRAPHY AND RESULTS OF DRILLING

By

K. M. Campbell, P.G. #192 and T. M. Scott, P.G. #99

U.S. EPA Contract #68000097
In cooperation with the United States Geological Survey

FLORIDA GEOLOGICAL SURVEY
TALLAHASSEE, FLORIDA
1991

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RADON POTENTIAL STUDY, ALACHUA COUNTY, FLORIDA:
NEAR-SURFACE STRATIGRAPHY AND RESULTS OF DRILLING

INTRODUCTION

The concentration of radon in soil gas is primarily dependant

on several site specific geologic and hydrologic conditions. These

parameters include the concentration of radium in the near surface

geologic units, the thickness, lithology and permeability of the

geologic units and the elevation of the water table. This U.S. EPA

funded study is part of a multidisciplinary project to determine

the relationship between the radon source, the characteristics of

the overlying sediments, and the radon concentration in the near

surface soil gas.

Florida Geological Survey (FGS) geologists met with their USGS

counterparts to discuss the geomorphology, stratigraphy and

mineralogy of the Alachua County area and its relationship to. the

occurrence of radon gas. The FGS assisted in site selection and

access to state owned lands and provided drilling services, data

collection and regional geology expertise. Sites were selected

which would represent a variety of geologic and geomorphic

conditions (Figure 1).

GEOLOGY

Geomorphology

Alachua County lies partially in the Northern or proximal

geomorphic zone and the Central or mid-peninsular zone of White

(1970). In general, the Northern zone is characterized by

continuous, broad upland areas. The central zone generally

consists of discontinuous, subparallel highlands separated by broad

a.

YI,
z

-J-l

- M

LEGEND

W ELLS
---- COUNTY BOUNDARY

SCAE

LINE 10 KMILMTERS

Figure I' Auger site location map

valleys. The geomorphic features recognized in Alachua County by

White (1970) include the Northern Highlands, Western Valley,

Alachua Lake Cross Valley, Fairfield Hills, Central Valley and the

Brooksville Ridge (Figure 2).

The Northern Highlands cover much of Alachua County (Figure

2). The broad upland area is composed of siliciclastic sediments

belonging to the Hawthorn Group, Cypresshead Formation and

undifferentiated siliciclastic sediments that are often residuum

from the older sediments. Near the western and southern boundaries

of the highlands in Alachua County, these sediments are often

perforated by karst features. This karstic area was referred to as

the Northern Highlands Marginal Zone by Williams et al. (1977) and

as the Perforated Zone by Macesich (1988). Elevations in the

Northern Highlands of Alachua County range from approximately 100

to 200 feet above mean sea level (MSL). Water-table conditions

vary dramatically in the area from well drained in the zone of

karst to poorly drained in those areas where impermeable sediments

of the Hawthorn Group retard downward movement of the water.

The lower-lying areas bounding the Northern Highlands in the

county form part of the Western Valley and Central Valley with the

connecting Alachua Lake Cross Valley (Figure 2). In these areas,

the karstified Ocala Limestone lies below a variable thickness of

undifferentiated siliciclastic sediments and remnants of the

Hawthorn Group sediments. Water-table conditions vary from well

drained in the highly karstic Western Valley to poorly drained in

the Alachua Lake Cross Valley and the northern end of the Central

Valley. Elevations in these lower areas range from approximately

LEGEND

SCALE

PHYSIOGRAPHIC BOUNDARY

5 0

LINE

5 N30 MILES

5 10 1! IG0IliTERS

Figure 21 Physiographic Map of Alachua County (After White, 1970)

55 to 125 feet above MSL (Williams et al., 1977).

The Fairfield Hills physiographic feature extends into Alachua

County from Marion County to the south (Figure 2). The hills are

an irregular erosional outlier of Hawthorn Group sediments and have

many characteristics similar to the Northern Highlands transitional

zone of Williams et al. (1977). Elevations range from

approximately 60 feet MSL to more than 160 feet MSL.

Along the southwestern edge of Alachua County lies the

Brooksville Ridge (Figure 2). The ridge is composed of sediments

often referred to as the Alachua "Formation" that are in part

residual from the Hawthorn Group and in part younger sands. The

area is highly karstified and well drained with surface elevations

ranging from approximately 55 to 135 feet above MSL (Williams et

al., 1977).

Stratigraphy

Ocala Limestone

The oldest sediments exposed or lying near the surface in

Alachua County belong to the Ocala Limestone (Figure 3). The Upper

Eocene Ocala Limestone is composed of a white to buff colored,

fossiliferous packstone to grainstone which ranges from poorly to

well indurated. The limestones are characteristically very

fossiliferous, containing numerous foraminifers, mollusks and

bryozoans. These carbonates contain negligible amounts of

siliciclastics and other authigenic minerals. The gamma-ray

signature of these sediments is characteristically in the very low

range of 10-20 counts per second (CPS) indicating a charac-

teristically low uranium content. The limestones of the Ocala are

- I

UNDIFFERENTIATED
SILICICLASTIC
SEDIMENTS

HAWTHORN
GROUP

(INCLUDING ALACHUA
'FORMATION')

LU
SOUTLIERS AND
0U RESIDUAL SILICIFIED
)0
Sc0 BOULDERS OF
_J SUVANNEE LIMESTONE

C

W Z OCALA
L LIMESTONE
D3

Figure 31

Generalized near-surface

geologic column, Alachua County

not an important source of radon.

The Ocala Limestone forms an important water producing zone in

the Floridan aquifer system. This aquifer system provides most of

the water for Alachua County.

These sediments are exposed at the surface or covered by a

relatively thin veneer of siliciclastics in the Western Valley in

western and southwestern Alachua County. Under the Northern

Highlands, the Ocala Limestone may occur more than 150 feet below

the land surface. In the Western Valley, the Ocala Limestone is

unconformably overlain by undifferentiated siliciclastic sediments

in most cases. However, in a few areas, remnants of the Hawthorn

Group sediments may be encountered. In the Northern Highlands and

the Central Valley the Ocala is unconformably overlain by the

Hawthorn Group sediments or, in rare instances by erosional

outliers of the Suwannee Limestone. On the Brooksville Ridge

residual sediments from the Hawthorn Group lie on the Ocala.

The FGS drilling efforts encountered the Ocala Limestone in

one hole, FA-A7, at 2.4 feet below land surface. Another hole, FA-

A7A, drilled nearby did not encounter the Ocala Limestone.

Throughout the area, the top of the Ocala is extremely variable due

to karstification and erosion.

Suwannee Limestone

The Oligocene Suwannee Limestone is present in Alachua County

as isolated outliers and residual boulders in the northwestern

portion of the county (Williams et al., 1977). It is usually found

as silicified boulders containing characteristic Suwannee fossils.

No Suwannee sediments were encountered during the augering

operations for this project.

Hawthorn Group

The Miocene Hawthorn Group is a complex unit of interbedded

and intermixed carbonates and siliciclastics containing widely

varying percentages of phosphate grains (Scott, 1988). The

percentages of quartz sand, silt, clay and carbonate exhibit a high

degree of variability often over short distances both horizontally

and vertically. The Hawthorn Group lies unconformably on the Ocala

Limestone or, in rare instances, on the isolated outliers of

Suwannee Limestone.

The Hawthorn Group in most of northern Florida consists of, in

ascending order, the Penney Farms Formation, the Marks Head

Formation and the Coosawhatchie Formation. In Alachua County, the

component formations of the Hawthorn Group can be recognized in

cores in the eastern portion of the county. Toward the western

limits of the Hawthorn Group in the county, the sediments grade

into an undifferentiated Hawthorn Group section that appears to

represent a Gulf coastal facies of the unit. For the purposes of

this investigation, the Hawthorn Group was not differentiated into

its component formations (Figure 3).

The phosphatic, clayey sediments of the Hawthorn Group occur

under the Northern Highlands and the Central Valley in Alachua

County. Exposures are limited to karst features and stream

valleys. Throughout much of the area it is covered by less than 20

feet of undifferentiated siliciclastic sediments. The top of the

group is an erosional unconformity and may exhibit significant

localized relief. Two auger holes, encountered Hawthorn Group

55 to 125 feet above MSL (Williams et al., 1977).

The Fairfield Hills physiographic feature extends into Alachua

County from Marion County to the south (Figure 2). The hills are

an irregular erosional outlier of Hawthorn Group sediments and have

many characteristics similar to the Northern Highlands transitional

zone of Williams et al. (1977). Elevations range from

approximately 60 feet MSL to more than 160 feet MSL.

Along the southwestern edge of Alachua County lies the

Brooksville Ridge (Figure 2). The ridge is composed of sediments

often referred to as the Alachua "Formation" that are in part

residual from the Hawthorn Group and in part younger sands. The

area is highly karstified and well drained with surface elevations

ranging from approximately 55 to 135 feet above MSL (Williams et

al., 1977).

Stratigraphy

Ocala Limestone

The oldest sediments exposed or lying near the surface in

Alachua County belong to the Ocala Limestone (Figure 3). The Upper

Eocene Ocala Limestone is composed of a white to buff colored,

fossiliferous packstone to grainstone which ranges from poorly to

well indurated. The limestones are characteristically very

fossiliferous, containing numerous foraminifers, mollusks and

bryozoans. These carbonates contain negligible amounts of

siliciclastics and other authigenic minerals. The gamma-ray

signature of these sediments is characteristically in the very low

range of 10-20 counts per second (CPS) indicating a charac-

teristically low uranium content. The limestones of the Ocala are

sediments, FA-A3 at 6.5 feet and FA-A7A at 14 feet below land

surface.

With respect to the radon problem, the phosphatic nature of

the Hawthorn Group sediments is a dominant controlling factor. The

carbonate fluorapatite mineral francolite occurs throughout these

sediments in widely varying proportions and contains variable

percentages of uranium. Gamma ray logs of the Hawthorn Group

sediments in the Alachua County area reveal readings varying from

tens of counts per second (cps) to more than 500 cps in some zones

(Scott, 1988). Zellars and Williams (1978) indicate that in the

Northern Florida phosphate district, which includes much of Alachua

County, the uranium content averages approximately 0.008% (80 ppm).

Sediments previously referred to as the Alachua "Formation"

are considered to be residual Hawthorn sediments that have been

weathered and reworked and are placed in the Hawthorn Group (see

Scott (1988) for a discussion of the Alachua Formation). These

sediments often occur as sink hole fill and stream channel fill in

the underlying Ocala Limestone. Hard rock phosphate, chert and

clay are often mixed in a quartz sand and may contain variable

percentages of uranium ranging up to 0.010% (100 ppm) (Zellars and

Williams, 1978). Hard rock-bearing sediments were encountered in

FA-A7A at 14-18 feet below the surface.

The Hawthorn Group sediments overlie the Floridan aquifer

system. These sediments both seal the aquifer system and, in

limited areas, form an intermediate aquifer system. Green et al.

(1989) describe and characterize these sediments in the Alachua

County area.

Undifferentiated siliciclastic sediments

The siliciclastic sediments unconformably overlying the

Hawthorn Group or, when the Hawthorn is absent, the Ocala

Limestone, are categorized as the "Undifferentiated siliciclastic

sediments" due to the paucity of lithologic criteria required to

define units (Figure 3). These sediments have been referred to as

the "Pleistocene" sands and terrace deposits (Williams et al.,

1977). Also incorporated in this unit for this project are the

siliciclastics belonging to the Cypresshead Formation (Scott, 1988)

which occur along the eastern boundary of Alachua County. The

computer-coded well logs refer to these sediments as the

undifferentiated sand and clay.

Quartz sands dominate this lithology and contain variable

admixtures of clay. The sands range from fine to very coarse and

may include some gravel-sized clasts. The sediments range in color

from white to reddish orange and are unconsolidated to poorly

indurated. Clay beds occur sporadically within these sediments.

This unit virtually blankets the entire county ranging from a few

feet thick to greater than 20 feet thick. Well FA-A7 encountered

only 2.4 feet of the undifferentiated sediments while FA-A8

penetrated 28 feet of it.

The undifferentiated siliciclastic sediments form the

surficial aquifer system where they are thick enough and where the

permeabilities are sufficient. The water quality is marginal and

the aquifer system is not extensively utilized.

METHODS

Nine auger holes were drilled utilizing a Simco 2400 SK auger

rig and 2.5 inch inside diameter hollow stem auger flights.

Continuous lithologic samples were collected, beginning at the land

surface and continuing to the total depth. Samples were collected

through the hollow stem augers utilizing either 2 inch Shelby tube

(thin wall) or split spoon samplers. The Shelby tube sampler was

either pushed by the rig hydraulics or driven with a 140 pound drop

hammer. The split spoon sampler was driven with the drop hammer and

was utilized only when conditions precluded sample recovery with

the Shelby tube. In order to obtain undisturbed samples, the

samples were collected in two foot runs ahead of the auger bit.

Retrieved samples were removed from the sample tube, placed in

divided core boxes and labeled as to site and depth interval. Once

sampling was complete, the hole was refilled with the sediments

which were brought to the surface while drilling the hole.

Each site was assigned a FGS well number for inclusion in the

statewide well sample archives. The samples from each site were

examined with a binocular microscope and the description and

formation picks were coded on standardized code sheets for entry

into the FGS computerized lithologic log data base. Parameters

include lithology, color, porosity types, induration, matrix

materials and quantity (%), grain size and range, sorting,

accessory minerals, fossils and comments etc. Columnar sections

were constructed to accompany the printed lithologic logs.

RESULTS

The nine auger holes drilled for this project ranged from 3.8

to 28 feet deep. The depth of individual holes was determined by

a variety of parameters including lithology, depth of water table,

Undifferentiated siliciclastic sediments

The siliciclastic sediments unconformably overlying the

Hawthorn Group or, when the Hawthorn is absent, the Ocala

Limestone, are categorized as the "Undifferentiated siliciclastic

sediments" due to the paucity of lithologic criteria required to

define units (Figure 3). These sediments have been referred to as

the "Pleistocene" sands and terrace deposits (Williams et al.,

1977). Also incorporated in this unit for this project are the

siliciclastics belonging to the Cypresshead Formation (Scott, 1988)

which occur along the eastern boundary of Alachua County. The

computer-coded well logs refer to these sediments as the

undifferentiated sand and clay.

Quartz sands dominate this lithology and contain variable

admixtures of clay. The sands range from fine to very coarse and

may include some gravel-sized clasts. The sediments range in color

from white to reddish orange and are unconsolidated to poorly

indurated. Clay beds occur sporadically within these sediments.

This unit virtually blankets the entire county ranging from a few

feet thick to greater than 20 feet thick. Well FA-A7 encountered

only 2.4 feet of the undifferentiated sediments while FA-A8

penetrated 28 feet of it.

The undifferentiated siliciclastic sediments form the

surficial aquifer system where they are thick enough and where the

permeabilities are sufficient. The water quality is marginal and

the aquifer system is not extensively utilized.

METHODS

Nine auger holes were drilled utilizing a Simco 2400 SK auger

rig and 2.5 inch inside diameter hollow stem auger flights.

Continuous lithologic samples were collected, beginning at the land

surface and continuing to the total depth. Samples were collected

through the hollow stem augers utilizing either 2 inch Shelby tube

(thin wall) or split spoon samplers. The Shelby tube sampler was

either pushed by the rig hydraulics or driven with a 140 pound drop

hammer. The split spoon sampler was driven with the drop hammer and

was utilized only when conditions precluded sample recovery with

the Shelby tube. In order to obtain undisturbed samples, the

samples were collected in two foot runs ahead of the auger bit.

Retrieved samples were removed from the sample tube, placed in

divided core boxes and labeled as to site and depth interval. Once

sampling was complete, the hole was refilled with the sediments

which were brought to the surface while drilling the hole.

Each site was assigned a FGS well number for inclusion in the

statewide well sample archives. The samples from each site were

examined with a binocular microscope and the description and

formation picks were coded on standardized code sheets for entry

into the FGS computerized lithologic log data base. Parameters

include lithology, color, porosity types, induration, matrix

materials and quantity (%), grain size and range, sorting,

accessory minerals, fossils and comments etc. Columnar sections

were constructed to accompany the printed lithologic logs.

RESULTS

The nine auger holes drilled for this project ranged from 3.8

to 28 feet deep. The depth of individual holes was determined by

a variety of parameters including lithology, depth of water table,

formations encountered and drilling conditions.

W-16649 (FA-A1): The upper 3.8 feet at this site probably

consist of fill material (slightly to moderately clayey quartz sand

with iron oxide staining, organic material and evidence of moldic

porosity).

The clay present in this material allows a perched water table

to form. Below the fill material the samples consist of fine

grained quartz sand with traces of highly leached phosphate grains

and variable quantities of clay, which increase with depth. Samples

below the fill material were dry. This site is located along the

margin of a closed drainage basin.

W-16650 (FA-A2): The entire drilled interval (23.5 feet)

consists of fine grained quartz sand with minor quantities of clay

and organic material and traces of heavy minerals. No water was

encountered. This site is at the top of a hill adjacent to an

active karst feature.

W-16651 (FA-A3): The uppermost sediments (0-6.5 feet) consist

of slightly to moderately clayey, medium grained quartz sand. Minor

quantities of organic material are present, primarily in the

uppermost .5 foot along with occasional fragments of charcoal and

phosphatic clay cemented sand. The top of the Hawthorn Group is at

6.5 feet. This material consists of yellowish gray to light olive

gray, medium grained quartz sand with variable quantities of clay

to variably quartz sandy clays. Both lithologies contain minor

quantities of phosphate sand. This is an upland site along the

Hawthorn Group outcrop belt.

W-16652 (FA-A4): Samples consist of fine grained quartz sand

with variable quantities of clay matrix. The 8-9 foot interval

contains a quartz and phosphatic sandy clay. Due to the high water

table and lack of cohesion the sands encountered below the water

table flow, causing drilling difficulties. Clay content increases

below 10.5 feet.

W-16653 (FA-A5): Samples consist of medium grained quartz

sand with variable but generally minor clay matrix and traces of

organic and heavy minerals. Below 9.5 feet the sand is fine

grained and only slightly clayey. This hole was abandoned at 16

feet due to sand flowing faster than it could be bailed out.

W-16654 (FA-A6): Sediments at this site consist of primarily

medium grained quartz sand with generally minor quantities of clay

matrix. Minor quantities of organic material are present in the

upper portion of the core. These materials are silty and contain

trace quantities of heavy minerals. Sand flow problems similar to

that at the previous site were encountered but were not as severe.

W-16655 (FA-A7): This site is adjacent to the old (abandoned)

Buda Limerock Quarries. The uppermost interval consists of fine

grained quartz sand with minor quantities of organic material and

heavy minerals. Limestone of the Ocala Limestone was encountered

at 2.4 feet. The TD of the hole was at 3.8 feet. No water was

encountered.

W-16656 (FA-A7A): Sediments in the interval 0-13.5 feet

consist of fine grained quartz sand with minor quantities of

organic material and clay. Below 2 feet they also contain

scattered granule to gravel sized fragments of well indurated hard

rock phosphate. Below 14 feet the sand is significantly more

clayey, is mottled and brecciated in appearance and contains

abundant clasts of hard rock phosphate. At 17.8 feet the sediment

is phosphate with minor quantities of quartz sand and clay. The

sediment is also slightly calcareous. TD is at 18 feet. The

interval below 14 feet is interpreted as Hawthorn Group. No water

was encountered. This site is at the south edge of an old hardrock

phosphate pit.

W-16657 (FA-A8): These sediments consist of fine grained

quartz sand with slight quantities of clay matrix. A trace of

phosphatic sand is found in the interval .5-3.5 feet. Below 20

feet granule-sized blebs and fragments of well indurated, white,

clayey sand is present. No water was encountered. This site is

adjacent to an old hardrock phosphate pit. Limestone pinnacles

extend essentially to the land surface in some of the pits in the

immediate vicinity.

CONCLUSIONS

The sites were selected to represent a variety of geologic and

hydrologic conditions. Six of the sites drilled penetrated only

sediments assigned to the undifferentiated surficial sands and

clays. W-16651 (FA-A3), and W-16656 (FA-A7A) penetrated sediments

of the Hawthorn Group, while W-16656 (FA-A7) encountered limestone

of the Ocala Limestone at 2.4 feet.

Three sites (FA-A4, FA-A5 and FA-A6) were similar both in

general lithology and in having high water tables. These sites are

located in regions of the county where the Floridan aquifer system

is confined or primarily confined (Macesich, 1988). Sites FA-Al

and FA-A3 are located in Macesich's Perforated Zone (primarily

confined): FA-Al is located along the flanks of. a karst drainage

basin (Floridan aquifer system locally unconfined) and the ground-

water table was not encountered. Site FA-A3 is located on

highlands with significant quantities of clayey sediment to confine

the Floridan. The remaining sites are located in areas where the

Floridan aquifer system is unconfined. Ground water was not

encountered at any of these sites.

REFERENCES

Green, R., Duncan, J., Seal, T., Weinburg, J.M., and Rupert, F.,
1989, Characterization of the sediments overlying the Floridan
aquifer system in Alachua County, Florida: Florida Geological
Survey Open File Report 29, 115 p.

Macesich, M., 1988, Geologic interpretation of the aquifer
pollution potential in Alachua County, Florida: Florida Geological
Survey Open File Report 21, 25 p.

Scott, T., 1988, The lithostratigraphy of the Hawthorn Group
(Miocene) of Florida: Florida Geological Survey Bulletin 59, 148 p.

White, W., 1970, The geomorphology of the Florida peninsula:
Florida Bureau of Geology Bulletin 51, 164 p.

Williams, K., Nicol, D. and Randazzo, A., 1977, The geology of the
western part of Alachua County, Florida: Florida Bureau of Geology
Report of Investigation 85, 98 p.

Zellars, M., and Williams, J., 1978, Evaluation of the phosphate
deposits of Florida using the minerals availability system: United
States Bureau of Mines Report Contract Number J0377000, 196 p.

clayey, is mottled and brecciated in appearance and contains

abundant clasts of hard rock phosphate. At 17.8 feet the sediment

is phosphate with minor quantities of quartz sand and clay. The

sediment is also slightly calcareous. TD is at 18 feet. The

interval below 14 feet is interpreted as Hawthorn Group. No water

was encountered. This site is at the south edge of an old hardrock

phosphate pit.

W-16657 (FA-A8): These sediments consist of fine grained

quartz sand with slight quantities of clay matrix. A trace of

phosphatic sand is found in the interval .5-3.5 feet. Below 20

feet granule-sized blebs and fragments of well indurated, white,

clayey sand is present. No water was encountered. This site is

adjacent to an old hardrock phosphate pit. Limestone pinnacles

extend essentially to the land surface in some of the pits in the

immediate vicinity.

CONCLUSIONS

The sites were selected to represent a variety of geologic and

hydrologic conditions. Six of the sites drilled penetrated only

sediments assigned to the undifferentiated surficial sands and

clays. W-16651 (FA-A3), and W-16656 (FA-A7A) penetrated sediments

of the Hawthorn Group, while W-16656 (FA-A7) encountered limestone

of the Ocala Limestone at 2.4 feet.

Three sites (FA-A4, FA-A5 and FA-A6) were similar both in

general lithology and in having high water tables. These sites are

located in regions of the county where the Floridan aquifer system

is confined or primarily confined (Macesich, 1988). Sites FA-Al

and FA-A3 are located in Macesich's Perforated Zone (primarily

confined): FA-Al is located along the flanks of. a karst drainage

basin (Floridan aquifer system locally unconfined) and the ground-

water table was not encountered. Site FA-A3 is located on

highlands with significant quantities of clayey sediment to confine

the Floridan. The remaining sites are located in areas where the

Floridan aquifer system is unconfined. Ground water was not

encountered at any of these sites.

REFERENCES

Green, R., Duncan, J., Seal, T., Weinburg, J.M., and Rupert, F.,
1989, Characterization of the sediments overlying the Floridan
aquifer system in Alachua County, Florida: Florida Geological
Survey Open File Report 29, 115 p.

Macesich, M., 1988, Geologic interpretation of the aquifer
pollution potential in Alachua County, Florida: Florida Geological
Survey Open File Report 21, 25 p.

Scott, T., 1988, The lithostratigraphy of the Hawthorn Group
(Miocene) of Florida: Florida Geological Survey Bulletin 59, 148 p.

White, W., 1970, The geomorphology of the Florida peninsula:
Florida Bureau of Geology Bulletin 51, 164 p.

Williams, K., Nicol, D. and Randazzo, A., 1977, The geology of the
western part of Alachua County, Florida: Florida Bureau of Geology
Report of Investigation 85, 98 p.

Zellars, M., and Williams, J., 1978, Evaluation of the phosphate
deposits of Florida using the minerals availability system: United
States Bureau of Mines Report Contract Number J0377000, 196 p.

APPENDIX

Lithologic logs and stratigraphic columns.

LITHOLOGIC WELL LOG PRINTOUT

WELL NUMBER: W- 16649 COUNTY ALACHUA
TOTAL DEPTH: 027.5 FT. LOCATION: T.09S R.19E S.28 0
27 SAMPLES FROM 0 TO 27 FT. LAT N 290 40M 32
LON W 82D 24M 41
COMPLETION DATE 10/51/59 ELEVATION 125 FT
OTHER TYPES OF LOGS AVAILABLE NONE

OWNER/DRILLER:. UNIV. OF FLA.; DRILLER: FGS

WORKED BY: RICHARD GREEN, KEN CAMPBELL 6/91; --AUGER SITE FA-AI--CONTINUOUS SHELBY
TUBE SAMPLES. 0-3.8' POSSIBLY FILL MATERIAL.

0. TD. UNDIFFERENTIATED SAND AND CLAY

0 .5 SAND; MODERATE BROWN TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX, ORGANIC MATRIX;
ACCESSORY MINERALS: PLANT REMAINS-20%, CLAY-02%;
ABUNDANT ROOTS.

.5- 2 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX, ORGANIC MATRIX;
ACCESSORY MINERALS: CLAY-02X, ORGANICS-02X;

2 3.6 SAND; MODERATE YELLOWISH BROWN TO DARK YELLOWISH BROWN; INTERGRANULAR,
POSSIBLY HIGH PERMEABILITY, PIN POINT VUGS;
GRAIN SIZE: FINE; RANGE: VERY FINE TO COARSE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX, ORGANIC MATRIX;
ACCESSORY MINERALS: PLANT REMAINS-O1X, CLAY-05X, ORGANICS-01%, HEAVY MINERALS-01%;
POSSIBLY MOLDIC; BLEBS AND GRAINS WITH IRON OXIDE CEMENT COATINGS AND BLEBS WITH ORGANIC
MATRIX.

3.6- 3.8 SAND; YELLOWISH GRAY TO VERY LIGHT ORANGE; INTERGRANULAR, LOW PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: CLAY-30X;
IRON OXIDE STAINING, VARIABLE TO A SANDY CLAY. CLAYEY ZONE WITH PLANT FRAGMENTS AT BASE.
MOTTLED CLAYEY AND SANDY ZONES.

SOURCE SFGS

W- 16649 CONTINUED

3.8- 5 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-02X;
CLAY PRIMARILY AS GRAIN COATINGS. TRACE OF FINE-MED, VERY WEATHERED PHOSPHATE GRAINS
(CREAN-EARTHY WHITE).

S- 19 SAND; MODERATE GRAY TO MODERATE DARK GRAY; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-02X, ORGANICS- X, HEAVY MINERALS-O1X;
MINOR (IX), SCATTERED BLEBS OF SAND WITH WHITE CLAY MATRIX WHITE CLAY IS VERY SLIGHTLY
PHOSPHATIC. FROM 10-19'.

19 21 SAND; GRAYISH BROWN TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-02X, ORGANICS- X, HEAVY MINERALS-O1X;
TRACE OF BLEBS OF SANDY UNITE CLAY, V. SLIGHTLY PHOSPHATIC.

21 24 SAND; DARK BROWN TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S)3 CLAY MATRIX;
ACCESSORY MINERALS: CLAY-05O HEAVY MINERALS-01X;
TRACE OF LEACHED PHOSPHATE GRAINS.

24 27 SAND; DARK BROWN TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX, ORGANIC MATRIX;
ACCESSORY MINERALS: CLAY-07, ORGANICS- X, HEAVY MINERALS-O1X;
SLIGHTLY MORE ORGANIC RICH THAN ABOVE.

27 27.5 SAND; ; INTERGRANULAR;
GRAIN SIZE: FINE; RANGE: VERY FINE TO COARSE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-25X, ORGANICS-02X, HEAVY MINERALS-01X;
INTERVAL IS OLIVE BLACK TO BROWNISH BLACK IN COLOR. MORE ORGANIC RICH THAN ABOVE. TRACE OF
HIGHLY LEACHED PHOS. GRNS.

27.5 TOTAL DEPTH

PAGE 2

SCALE
FEET METERS
0 0

5

-2

10-

. "* ^ > .'. '."
*.**....... ...'

.. .'..: ... "v
-

- m
.

CLAY

.'' *'" ORGANIC

LIMESTONE

... P PHOSPHATE

CLAY 02%, HEAVY MINERALS 01%,
ORGANIC. TRACE OF BLEBS OF
SANDY WHITE CLAY, VERY
SLIGHTLY PHOSPHATIC.

CLAY 05%, HEAVY MINERALS 01%.
TRACE OF LEACHED PHOSPHATE GRAINS.

CLAY 07%, HEAVY MINERALS 01%,
ORGANIC. SLIGHTLY MORE ORGANIC
RICH THAN ABOVE.

CLAY 25%, ORGANIC 02%, HEAVY
MINERALS 01%. TRACE OF HIGHLY LEACHED
PHOS. GRAINS. MORE ORGANIC RICH THAN ABOVE

PLANT REMAINS 20%. CLAY 02%.

CLAY 02%, ORGANIC 02%

CLAY 05%, HEAVY MINERALS 01%,
ORGANIC 01%, PLANT REMAINS 01%.
CLAY 30%, VARIABLE TO A SANDY CLAY.

CLAY 02% TRACE OF
WEATHERED PHOSPHATE.

CLAY 02%, HEAVY MINERALS 01%,
ORGANIC. TRACE OF BLEBS OF
SANDY WHITE CLAY, VERY
SLIGHTLY PHOSPHATIC.

27.5-

. W,'. .'.' '.4. .

" ---A-
.. .. .. .. .. .. .
.. .. .. .. .

W-16649
ALACHUA COUNTY, FL.
AUGER SITE FA-A1
ELEVATION 125'.
T. 09S R. 19E S28 D
LAT= N 29D 40M 32S

LON= V 82D 24M 41S
TOTAL DEPTH: 27.5'.

0-T.D. UNDIFFERENTIATED
SAND AND CLAY

KEY

:: i:il rFINE SAND

MEDIUM SAND

COARSE SAND

LITHOLOGIC WELL LOG PRINTOUT

WELL NUMBER: U- 16650
TOTAL DEPTH: 23.5. FT.
23 SAMPLES FROM 0 TO 24 FT.

COMPLETION DATE 05/15/91
OTHER TYPES OF LOGS AVAILABLE NONE

COUNTY LEVY
LOCATION: T.11S R.17E S.13 D
LAT a N 290 31M 36
LON U 820 33H 42
ELEVATION 090 FT

OWNER/ORILLER: OWNER: MR. DAVE HINTENLANG; DRILLER: FGS.

WORKED BY: RICHARD GREEN AND KEN CAMPBELL 6/91; --AUGER SITE FA-A2--, LEVY COUNTY.
CONTINUOUS SHELBY TUBE SAMPLES.

UNDIFFERENTIATED SAND AND CLAY

0 1 SAND; OLIVE GRAY TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH
GRAIN SIZE: FINE; RANGE: FINE TO MEDIUM;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: ORGANICS-05X;
ROOTS PRESENT.

PERMEABILITY;

1 16 SAND; VERY LIGHT ORANGE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-O1X, CLAY-01,X ORGANICS-O1X;
WELL SORTED SAND. THIN BED AT 14' U/ 5X WHITE CLAY MATRIX.

16 16.3 SAND; VERY LIGHT ORANGE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-O1X, HEAVY MINERALS-01X;
3" RECOVERY 16-18'. UNCONSOLIDATED TO V. POORLY INDURATED.

16.3- 18.5 NO SAMPLES

18.5- 19 SAND; VERY LIGHT ORANGE TO TRANSPARENT; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-01X;
CLEAN QTZ SAND, WELL SORTED- V. PALE YELLOW-ORANGE TO CLEAR.

SOURCE FGS

W- 16650 CONTINUED PAGE 2

19 23 SAND; GRAYISH BROWN TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX, ORGANIC MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: CLAY-05%, ORGANICS-02X;
SLIGHTLY MORE ORGANIC AND CLAY FROM 19.5-20' AND 21-23.5'. FAINT BEDDING (INCLINED) AT
20'.--THIN CLAY LAMINAE.

23 23.5 SAND; GRAYISH BROWN TO MODERATE BROWN; INTERGRANULAR; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: CLAY-05%, HEAVY MINERALS-01X;
CENTER OF CORE HAS MOD. BRN CLAY MATRIX.

23.5 TOTAL DEPTH

SCALE
FEET Y4TERS

,t '* i

HEAVY MINERALS 01%. WELL SORTED.

ORGANIC 05%. ROOTS PRESENT.

CLAY, HEAVY MINERALS, ORGANICSI 01%.
VELL SORTED SAND.

NO SAMPLES RECOVERED

KEY

[::.:::: i FINE SAND

1 MEDIUM SAND

COARSE SAND

CLAY

::*:'*:::* ORGANICS

S I LIMESTONE

i1 ,.' 1 'r s ,PHOSPHATE

CLAY 05%, ORGANIC 02X.

CLAY 05%. HEAVY MINERALS 01%.

W-16650
LEVY COUNTY, FL.
AUGER SITE FA-A2
ELEVATION 90'.
T. 11S R. 17E S, 13 D
LAT= N 29D 31M 36S

LON= W 82D 33M 42S

TOTAL DEPTH, 24.0'.

0-T.D. UNDIFFERENTIATED

SAND AND CLAY

"""""'~ '

--
u*...~u- i
Y i' i' -
- --- -
-- ---

:r_? _*;~
X-i-i-S
*)L-
--- --
rr*yru~
"---

LITHOLOGIC WELL LOG PRINTOUT

WELL NUMBER: W- 16651 COUNTY ALACHUA
TOTAL DEPTH: 00020 FT. LOCATION: T.08S R.18E S.35
20 SAMPLES FROM 0 TO 20 FT. LAT = N 290 44M 50
LON = W 82D 28M 37
COMPLETION DATE 05/15/91 ELEVATION 168 FT
OTHER TYPES OF LOGS AVAILABLE NONE

OWNER/DRILLER: OWNER: SAN FELASCO HAMMOCK STATE PRESERVE; DRILLER: FGS.

WORKED BY: RICHARD GREEN AND KEN CAMPBELL 6/91. --AUGER SITE FA-A3--; LOCATED IN
EASTERN 1/2 OF IRREGULAR SECTION 35. CONTINUOUS SHELBY TUBE SAMPLES.

0. 6.5 UNDIFFERENTIATED SAND AND CLAY
6.5- TD. HAWTHORN GROUP

0 .5 SAND; DARK BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): ORGANIC MATRIX, CLAY MATRIX;
ACCESSORY MINERALS: CLAY-05%, ORGANICS-05%, PLANT REMAINS-15X;
ABUNDANT ROOTS.

.5- 5 SAND; GRAYISH BROWN TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO COARSE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): ORGANIC MATRIX, CLAY MATRIX;
ACCESSORY MINERALS: CLAY-07X, ORGANICS-01X;
OCCASIONAL FRAGMENTS PHOS. CLAY CEMENTED SAND, OCCASIONAL FRAGMENTS OF CHARCOAL.

5 6.5 SAND; WHITE TO VERY LIGHT GRAY; INTERGRANULAR, LOW PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO COARSE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: CLAY-20X, HEAVY MINERALS-01X;
CLAY CONTENT RANGES 30-15X AND DECREASES WITH DEPTH.

6.5- 9 SAND; YELLOWISH GRAY TO LIGHT OLIVE GRAY; INTERGRANULAR, LOW PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO COARSE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: HEAVY MINERALS-01X, CLAY-25X;
CLAY CONTENT VARIABLE 10-50%, VARIABLE TO A VERY SANDY CLAY. CLAY REACTS V. SLIGHTLY TO
PHOS. INDICATOR. TRACE OF HIGHLY LEACHED PHOSPHATE SAND.

SOURCE FGS

U- 16651 CONTINUED

9 10 CLAY; YELLOWISH GRAY TO LIGHT OLIVE GRAY; LOW PERMEABILITY, INTERGRANULAR; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: QUARTZ SAND-15X, PHOSPHATIC SAND-01X;
OTHER FEATURES: PLASTIC;
VARIABLE SAND CONTENT (10-30%).

10 11.8 SAND; YELLOWISH GRAY TO LIGHT OLIVE GRAY; INTERGRANULAR, LOU PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO COARSE;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-20%, CLAY-40X, PHOSPHATIC SAND-O1X;
OTHER FEATURES: PLASTIC, WEATHERED;
BLEBS YELLOW ORANGE SANDY CLAY, INTERVAL FLOWED IN CORE TRAY.

11.8- 12.8 AS ABOVE
CLAY AS ABOVE BUT FIRMER- PLASTIC, COHESIVE. RETAINED CORE SHAPE. VARIABLE TO CLAYEY SAND.
SAND 25X, HEAVIES 01X, PHOS. SAND 01X.

12.8- 13.5 CLAY; YELLOWISH GRAY TO GREENISH GRAY; LOW PERMEABILITY,.INTERGRANULAR; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: PHOSPHATIC SAND-05X, QUARTZ SAND-05X, HEAVY MINERALS-01X;
PHOSPHATE IS HIGHLY LEACHED.

13.5- 14.5 CLAY; YELLOWISH GRAY TO GREENISH GRAY; LOW PERMEABILITY, INTERGRANULAR; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED, BIOTURBATED,
ACCESSORY MINERALS: QUARTZ SAND-03X, IRON STAIN-01X, SILT- X, PHOSPHATIC SAND-03X;
OTHER FEATURES: WEATHERED;
HIGHLY VARIABLE SAND, SILT CONTENT. MOTTLED WITH IRON STAINS AND SANDY BLEBS. CONSISTS OF
GREENISH CLAY WITH VARIABLE SAND CONTENT. PHOS. SAND IS HIGHLY LEACHED. IRON STAIN ON
OUTSIDE OF CORE DUE TO SAMPLE LEFT IN SHELBY TUBE.

14.5- 16 CLAY; MODERATE GRAYISH GREEN TO LIGHT OLIVE BROWN; LOW PERMEABILITY, INTERGRANULAR;
POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED, BIOTURBATED,
ACCESSORY MINERALS: IRON STAIN-01X, QUARTZ SAND-02%, PHOSPHATIC SAND-02X;
MOTTLED WITH CLAY AND IRON STAINS. IRON STAIN SEEMS TO FOLLOW THE SANDIER LAYERS. MINOR
SAND IN CLAYS. TRACE OF SULFIDES ORGANIC RICH CLAY AT 15.9'. VARIABLE SAND AND SILT.
LEACHED PHOS. SAND ASSOCIATED W/ SANDY LAYERS. CLAY IS WAXY.

16 20 SAND; YELLOWISH GRAY TO LIGHT OLIVE GRAY; INTERGRANULAR, LOW PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: CLAY-10X, CLAY-35X, PHOSPHATIC SAND-01X;
VARIABLE CLAY CONTENT- SAMPLE STILL WET AND VERY STICKY AND PLASTIC. CLAY INCREASES WITH
DEPTH TO A SANDY CLAY.

20 TOTAL DEPTH

PAGE 2

SCA
FEET M
T

LE
ETERS
0 .i: ,...

,J) M.'.'*.w '.-M'."

MM A A
..-.'r.':.:-~.'.'.-

-2

., M W'. W .:
"'. W "'"A'A

"- --
'4.: 4* .'.

6 s s '
"..^w'..w^
^w/wT-"w
SS^SSS
Y^WW"^I
iK'wXA^W^W
^Ai'Xw'af
^WJ^A' WJ
:^. .SS?.w
Kffgg--
*7 -
---iy

4 --

""g"g""gg

(a-^g" .

CLAY 05%, ORGANIC 05%,
PLANT REMAINS 15%.

CLAY 07%, ORGANIC 01%,
TR. PHOSPHATIC CLAY
CEMENTED SAND.

W-16651
ALACHUA COUNTY, FL.
AUGER SITE FA-A3
ELEVATION 168'.
T. 08S R. 18E S. 35
LAT= N.29D 44M 50S

LON= W 82D 28M 37S
TOTAL DEPTH: 20.0'.

CLAY 10-50%, AVG 25%,
VARIABLE TO V. SANDY CLAY.
TR. LEACHED PHOS. SAND.
HEAVY MINERALS 01%.

SAND 15%, PHOS. SAND 01%,
QTZ SAND VARIABLE 10-30%.

CLAY 20-40%, PHDS. SAND 01%.
PLASTIC, WEATHERED.

SAND 25%, HEAVY MINERALS
01%, PHOS. SAND 01%.
QTZ SAND 05%, HEAVY MINERALS
01%, LEACHED PHOS. SAND 05%.
QTZ SAND 03%, SILT, IRON STAIN
01%, LEACHED PHOS, SAND 03%.

QTZ SAND 02%, LEACHED PHDS.
SAND 02%, IRON STAIN 01%

VARIABLE CLAY 10-35%,
PHOSPHATE SAND 01%
CLAY INCREASES WITH DEPTH
TO A SANDY CLAY.

0-6.5' UNDIFFERENTIATED
SAND AND CLAY

6,5'-T.D, HAWTHORN GROUP

KEY

LI:II :: FINE SAND

I MEDIUM SAND

i COARSE SAND

I -I CLAY

I ~ .'* ORGANIC

LIMESTONE

I .I PHOSPHATE
'Pr''.

CLAY 30-15%, AVG. 20%,
DECREASE V/ DEPTH. HEAVY
MINERALS 01%.

LITHOLOGIC WELL LOG PRINTOUT

WELL NUMBER: W- 16652 COUNTY ALACHUA
TOTAL DEPTH: 00014 FT. LOCATION: T.08S R.21E S.330A
14 SAMPLES FROM 0 TO 14 FT. LAT N 290 45M 25
LON a U 820 12M 29
COMPLETION DATE 05/16/91 ELEVATION 152 FT
OTHER TYPES OF LOGS AVAILABLE NONE

OWNER/DRILLER: OWNER: UNIV. OF FLA, AUSTIN CARY FOREST; DRILLER: FGS.

WORKED BY: RICHARD GREEN AND KEN CAMPBELL 6/91. --AUGER SITE FA-A4--; CONTINUOUS
SHELBY TUBE/ SPLIT SPOON SAMPLES.

0. TO. UNDIFFERENTIATED SAND AND CLAY

0 4 SAND; LIGHT GRAY TO MODERATE GRAY; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY: POOR INDURATION;
CEMENT TYPESS: ORGANIC MATRIX;
ACCESSORY MINERALS: PLANT REMAINS-OS, HEAVY MINERALS-01X;
PLANT FRAGMENT AND ROOTS AT 0-0.5'. ORGANIC AND TRACE OF CLAY AT 3'. SCATTERING OF
COARSE-V.C. GRAINS. NO TO POOR INDURATION.

4 7.5 SAND; GRAYISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-OS, PLANT REMAINS-O1X, SILT- X, HEAVY MINERALS-01X;
ROOT TRACES ANO CASTS PRESENT.

7.5- 9 SAND; VERY LIGHT ORANGE TO WHITE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-01X;
8-9' INTERVAL ALSO CONTAINS LT OLIVE-DUSKY YELLOW CLAY- QTZ AND PHOS. SANDY, HOWEVER
SAMPLE IS SMEARED UP ALONG INSIDE OF SPLIT SPOON SAMPLE, THEREFORE DEPTH INTERVAL IS
UNCLEAR.

9 10 NO SAMPLES

10 10.5 SAND; GRAYISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: CLAY-05X, CLAY-1OX;

SOURCE FGS

W- 16652 CONTINUED PAGE 2

10.5- 12 SAND; GRAYISH BROWN TO WHITE;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS:SUB-ROUNDED; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: CLAY-20O, HEAVY MINERALS-01X;
COLOR RANGES TO PALE BROWN TOWARDS BASE. POOR-MOD. INDURATION. MOTTLED APPEARANCE. MINOR
CLAY MATRIX. (MOTTLED TAN- BROWN-LT GRAY).

12 14 SAND; VERY LIGHT GRAY TO YELLOWISH GRAY; INTERGRANULAR, LOW PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-20%, HEAVY MINERALS-01X;

14 TOTAL DEPTH

SCALE
;EE' 4CTERS

i':':'",

t, .
5

I I -

10.1
,*; -

.** ** Jw *

PLANT REMAINS 05%, HEAVY
MINERALS 01%. TRACE OF CLAY.

CLAY 057. PLANT REMAINS 017.
HEAVY MINERALS 01%. SILT.
ROOT TRACES AND CASTS PRESENT.

HEAVY MINERALS 01%7 SOME CLAY,
QTZ AND PHOS. SAND 8-9'.

NO SAMPLES RECOVERED.

VARIABLE CLAY 5-10%.
CLAY 207, HEAVY MINERALS 01%.
MOTTLED APPEARANCE.

CLAY 20%, HEAVY MINERALS 01%.

W-16652
ALACHUA COUNTY, FL.
AUGER SITE FA-A4
ELEVATION 152'.
T, 08S R. 21E S. 33 DA
LAT= N 29D 45M 25S
LON= WV. 82D 12M 29S
TOTAL DEPTH, 14.0'.

0-T.D. UNDIFFERENTIATED
SAND AND CLAY

KEY

Ei:I^::I FINE SAND

i ... MEDIUM SAND

COARSE SAND

,:::-.-_---::-_4 L
E*x-j: CLAY

*.* ORGANICS

LIMESTONE

l p' 'P I PHOSPHATE

LITHOLOGIC WELL LOG PRINTOUT

WELL NUMBER: W- 16653 COUNTY ALACHUA
TOTAL DEPTH: 00016 FT. LOCATION: T.09S R.20E S.02IR
16 SAMPLES FROM 0 TO 16 FT. LAT c N 290 43M 56
LON = W 82D 16M 35
COMPLETION DATE 05/17/91 ELEVATION 142 FT
OTHER TYPES OF LOGS AVAILABLE NONE

OWNER/DRILLER: OWNER: UNIV. OF FLA., BEEF RESEARCH UNIT. DRILLER: FGS.

WORKED BY: RICHARD GREEN AND KEN CAMPBELL 6/91; --AUGER SITE FA-A5--
CONTINUOUS SHELBY TUBE SAMPLES.

0. TD. UNDIFFERENTIATED SAND AND CLAY

0 1 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: MEDIUM TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: PLANT REMAINS-05%, CLAY-01X;
UNCONSOLIDATED TO POORLY INDURATED.

1 2.5 SAND; GRAYISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: MEDIUM TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: PLANT REMAINS-01X, CLAY-01X;

2.5- 4.5 SAND; DARK YELLOWISH BROWN TO MODERATE YELLOWISH BROWN; INTERGRANULAR;
GRAIN SIZE: MEDIUM; RANGE: MEDIUM TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: CLAY-02X, CLAY-05X,.HEAVY MINERALS-O1X, PLANT REMAINS-01%;
SCATTERED FRAGMENTS OF CHARCOAL. VARIABLE CLAY CONTENT (IRON STAINED); MINOR ROOTLETS.
MORE IRON-STAINED CLAY AT 3.25-3.75'. VARIABLE PERMEABILITY.

4.5- 6.5 SAND; LIGHT BROWN; INTERGRANULAR, LOW PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: CLAY-20X, IRON STAIN-01X, HEAVY MINERALS-01X;
ORANGISH BROWN CLAY MATRIX AND LT GRAY CLAY MATRIX. VARIABLE X OF ORANGE VS. GRAY CLAY.
ORANGE CLAY DOMINANT 4.5-5.5', 50/50 MIX 5.5-6.5'. TRACE OF HEAVIES.

SOURCE FGS

W- 16653 CONTINUED

6.5- 9.5 SAND; LIGHT YELLOWISH ORANGE TO DARK YELLOWISH ORANGE; POSSIBLY HIGH PERMEABILITY,
INTERGRANULAR;
GRAIN SIZE: MEDIUM; RANGE: FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-02%, HEAVY MINERALS-01X;
CLAY CONTENT INCREASES DOWNWARDS TO APPROX. 5%.

9.5- 10 SAND; WHITE TO GRAYISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: MEDIUM TO VERY FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: CLAY-01%, HEAVY MINERALS-O1X;
VARIABLE CLAY CONTENT 0-1%. SHEATH OF BROWNISH CLAYEY SAND AROUND INTERVAL 10-11'--CAUSED
BY DRILLING.

10 10.8 SAND; GRAYISH ORANGE TO LIGHT YELLOWISH ORANGE;
GRAIN SIZE: FINE; RANGE: VERY FINE TO MEDIUM;
ROUNONISS:SUB-ROUNDED; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: CLAY-02X, HEAVY MINERALS-01X;
UNCONSOLIDATED TO POORLY INDURATED.

10.8- 16 SAND; VERY LIGHT ORANGE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: MEDIUM TO VERY FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-01X, CLAY-O1X, CLAY-05X;
MASSIVE SAND. CLAY CONTENT INCREASES DOWNWARDS TO APPROX. 5%.

16 TOTAL DEPTH

PAGE 2

SCALE
FEET METERS
0 0

PLANT REMAINS 05%, CLAY 01%.

PLANT REMAINS 01%, CLAY 01%.

CLAY 02-05%, HEAVY MINERALS 01%,
PLANT REMAINS 01%. IRON STAINED.
SCATTERED FRAGMENTS OF CHARCOAL.

CLAY 20%, IRON STAIN 017.
HEAVY MINERALS 01%. MOTTLED.

CLAY 02%, HEAVY MINERALS 01%.
CLAY INCREASES DOWNWARDS
TO APPROXIMATELY 05%.

CLAY 01O, HEAVY MINERALS 01%.
CLAY 02%, HEAVY MINERALS 01%.

HEAVY MINERALS 01%, CLAY 01-05%.
CLAY CONTENT INCREASES
DOWNVARDS TO APPROX. 05%.

W-16653
ALACHUA COUNTY, FL.
AUGER SITE FA-A5
ELEVATION 142'.
T. 09S R, 20E S. 02 IRR
LAT= N 29D 43M 56S
LON= W 82D 16M 35S
TOTAL DEPTH: 16.0'.

0-T.D, UNDIFFERENTIATED
SAND AND CLAY

KEY

Iil' :' FINE SAND

MEDIUM SAND

i COARSE SAND

II-- CLAY

:'.':':'' ORGANICS

SI LIMESTONE

P %' PHOSPHATE

LITHOLOGIC WELL LOG PRINTOUT

WELL NUMBER: U- 16654 COUNTY ALACHUA
TOTAL DEPTH: 00020 FT. LOCATION: T.09S R.19E S.09AA
20 SAMPLES FROM 0 TO 20 FT. LAT = N 290 43M 50
LON U 820 25N 11
COMPLETION DATE 05/17/91 ELEVATION 170 FT
OTHER TYPES OF LOGS AVAILABLE NONE

OUElR/DRILLER: OWNER: UNIV. OF FLA, AGRICULTURE EXP. STATION; DRILLER: FGS.

WORKED BY: RICHARD GREEN AND KEN CAMPBELL 6/91; --AUGER SITE FA-A6--.
CONTINUOUS SHELBY TUBE AND SPLIT SPOON SAMPLES.

0. TO. UNDIFFERENTIATED SAND AND CLAY

0 1 SAND; DARK YELLOWISH BROWN; INTERORANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO VERY FINE;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
CEMENT TYPE(S): ORGANIC MATRIX, CLAY MATRIX;
ACCESSORY MINERALS: ORGANICS-03X, PLANT REMAINS-05X, SILT- X, CLAY-05X;
ROOTS. ORGANIC DECREASE DOWNUARDS.

1 2 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO VERY FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
CEMENT TYPESS: ORGANIC MATRIX, CLAY MATRIX;
ACCESSORY MINERALS: ORGANICS-02%, PLANT REMAINS-01X, SILT- X, CLAY-05X;

2 3 NO SAMPLES

3 4 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO VERY FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
CEMENT TYPESS: ORGANIC MATRIX, CLAY MATRIX;
ACCESSORY MINERALS: ORGANICS-'O1, PLANT REMAINS-01X, SILT- %, CLAY-05X;

4 8 SANO; VERY LIGHT GRAY TO YELLOWISH GRAY; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO VERY FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-05X, CLAY-1OX, HEAVY MINERALS-01X;

8 13 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO VERY FINE;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: CLAY-10X, SILT-X;

SOURCE FGS

W- 16654 CONTINUED

13 17.5 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: FINE TO VERY FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: ORGANICS-O1X, CLAY-10X, SILT- X, HEAVY MINERALS-01X;
SLOW DECREASE IN MATRIX WITH DEPTH.

17.5- 18 SAND; VERY LIGHT GRAY; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-08X, HEAVY MINERALS-O1X;

18 20 SAND; VERY LIGHT GRAY TO YELLOWISH GRAY; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: MEDIUM; RANGE: VERY FINE TO MEDIUM;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPESS: CLAY MATRIX;
ACCESSORY MINERALS: CLAY-02X, CLAY-05X, HEAVY MINERALS-01X;

20 TOTAL DEPTH

PAGE 2

5 E
1 '.R

'RGANICS 03%, PLANT REMAINS 05"%.
CLAY 05;% SILT. ORGANIC DECREASE
DOWNWARD;.
ORGANIC J':, PLANT REMAINS 01%
CLAY 05:, SILT.

NO SAMPLES RECOVERED,

ZRGANICS 01%. PLANT REMAINS 01%,
CLAY 05%, SILT.

CLAY 05-10%O HEAVY MINERALS Cl%.

CLAY 10%, SILT.

CLAY 107% HEAVY MINERALS 01%,
ORGANIC 01%, SILT. SLOW
DECREASE IN MATRIX WITH DEPTH.

CLAY 08%, HEAVY MINERALS 01%.

CLAY 02-05%. HEAVY. MINERALS 01%.

''--16654
ALACHUA COUNTY, FL.
AUGER SITE FA-A6
ELEVATION 170'.
T, 09S R. 19E S, 09 AA
LAT= N 29D 43M 50S
LON= 'd 82D 25M 11S
TOTAL DEPTH, 20.0'.

0-T.D. UNDIFFERENTIATED
SAND AND CLAY

KEY

S .. FINE SAND

::.: MEDIUM SAND

COARSE SAND

CLAY

*.. j ORGANIC

LIMESTONE

PHOSPHATE
p ,p Jp

-a

r4

.5-I

20 -

LITHOLOGIC WELL LOG PRINTOUT

WELL NUMBER: W- 16655 COUNTY ALACHUA
TOTAL DEPTH: 003.8 FT. LOCATION: T.08S R.17E S.29CD
4 SAMPLES FROM 0 TO 4 FT. LAT n N 290 45M 22
LON U 820 371 54
COMPLETION DATE 05/28/91 ELEVATION 075 FT
OTHER TYPES OF LOGS AVAILABLE NONE

OWNER/DRILLER: OWNER: LONCALA PHOSPHATE CO.; DRILLER: FOS.

WORKED BY: RICHARD GREEN AND KEN CAMPBELL 6/91; LOCATED ON SOUTH LINE OF
SECTION 29, CCD. --AUGER SITE FA-A7--SHELBY TUBE SAMPLES.

0. 2.4 UNDIFFERENTIATED SAND AND CLAY
2.4- TD. OCALA GROUP

0 1 SAND; MODERATE GRAY; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
CEMENT TYPE(S): ORGANIC MATRIX;
ACCESSORY MINERALS: ORGANICS-02X, PLANT REMAINS-03X;
UNCONSOLIDATED TO POORLY INDURATED.

1 2.4 SAND; GRAYISH BROWN; .INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-01%, ORGANICS-01X;
UNCONSOLIDATED TO POORLY INDURATED.

2.4- 3.8 LIMESTONE; WHITE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY, INTRAGRANULAR;
GRAIN TYPE: BIOGENIC, SKELETAL, CALCILUTITE; 70% ALLOCHEMICAL CONSTITUENTS;
GRAIN SIZE: MEDIUM; RANGE: MICROCRYSTALLINE TO MEDIUM; POOR INDURATION;
CEMENT TYPESS: CALCILUTITE MATRIX;
ACCESSORY MINERALS: PLANT REMAINS-01X;
OTHER FEATURES: WEATHERED;
FOSSILS: BENTHIC FORAMINIFERA;
NUMMULITES, LEPIDOCYCLINA SP. NOTED; PUNKY, WEATHERED LS. ABUNDANT SMALL FORAMS.

3.8 TOTAL DEPTH

SOURCE FGS

SCALE
'EE' fERS

ORGANIC 02%, PLANT REMAINS 03%.

HEAVY MINERALS 01%V ORGANIC 01%.

PLANT REMAINS 01%. NUMMULITES,
LEPIDOCYCLINA SP. NOTED.
PUNKY, WEATHERED LIMESTONE.

1p> pp PHOSPHATE

V-16655
ALACHUA COUNTY, FL.
AUGER SITE FA-A7
ELEVATION 75'.
T. 08S R. 17E S. 29 CD
LAT= N 29D 45M 22S
LON= V 82D 37M 54S
TOTAL DEPTHi 3.8'.

0-2.4' UNDIFFERENTIATED
SAND AND CLAY
2.4'-T.D. OCALA GROUP

KEY

: :':: FINE SAND

i^ MEDIUM SAND

COARSE SAND

Z':- CLAY

S ORGANIC

LIMESTONE

LITHOLOGIC WELL LOG PRINTOUT SOURCE FGS

WELL NUMBER: W- 16656 COUNTY ALACHUA
TOTAL DEPTH: 00018 FT. LOCATION: T.08S R.17E S.320A
18 SAMPLES FROM 0 TO 18 FT. LAT = N 290 45M 06
LON = W 82D 38H 10
COMPLETION DATE 05/28/91 ELEVATION 080 FT
OTHER TYPES OF LOGS AVAILABLE NONE

OWNER/DRILLER: OWNER: LONCALA PHOSPHATE CO.; DRILLER: FGS.

WORKED BY: RICHARD GREEN AND KEN CAMPBELL 6/91; --AUGER SITE FA-A7A--
CONTINUOUS SHELBY TUBE SAMPLES.

0. TD. UNDIFFERENTIATED SAND AND CLAY

0 1 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
CEMENT TYPE(S): ORGANIC MATRIX, CLAY MATRIX;
ACCESSORY MINERALS: ORGANICS-02X, PLANT REMAINS-02%, CLAY-03%;

1 2 SAND; GRAYISH BROWN TO LIGHT GRAYISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
CEMENT TYPE(S): ORGANIC MATRIX, CLAY MATRIX;
ACCESSORY MINERALS: ORGANICS-01%, PLANT REMAINS-01%;

2 12.5 SAND; GRAYISH ORANGE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: IRON STAIN- X, CLAY-02%, HEAVY MINERALS-01X;
WELL SORTED, OCCASIONAL ROOTS. UNCONSOLIDATED TO POORLY INDURATED. SCATTERED GRANULE TO
GRAVEL SIZED FRAGMENTS OF WELL INDURATED HARD ROCK PHOSPHATE.

12.5- 13.5 SAND; VERY LIGHT ORANGE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-01X;
AS ABOVE W/O IRON STAIN.

13.5- 14 NO SAMPLES

W- 16656 CONTINUED PAGE 2

14 17.8 SAND; GRAYISH BROWN TO WHITE; INTERGRANULAR, LOW PERMEABILITY;
GRAIN SIZE: FINE; RANGE: MEDIUM TO VERY FINE;
ROUNONESS: ROUNDED TO SUB-ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED, BRECCIATED,
ACCESSORY MINERALS: CLAY-05X, CLAY-15X, HEAVY MINERALS-O1X, IRON STAIN- X;
OTHER FEATURES: CALCAREOUS, WEATHERED;
MOTTLED AND BRECCIATED APPEARANCE. ABUNDANT CLASTS OF WHITE HARD ROCK PHOSPHATE, SINKHOLE
FILLING. VARIABLE CLAY CONTENT AND IRON STAIN. SEEMS TO BECOME MORE PHOSPHATIC WITH DEPTH.
15-30% HARD ROCK PHOSPHATE.

17.8- 18 PHOSPHATE; WHITE TO YELLOWISH GRAY; MODERATE INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: QUARTZ SAND-10X, CLAY-05X;
PHOSPHATE AND CLAY MATRIX. OVERALL TEXTURE CRUMBLY. SLIGHTLY CALCAREOUS CLAYEY SAND MATRIX
SEPARATES GRAVEL SIZED FRAGMENTS OF HARD ROCK PHOSPHATE.

18 TOTAL DEPTH

SCALE
FEET METERS
0 0

5-

-

10 -

. : .' ." .. '.v .. ... -

.- .'.. '... '... "
.....--.-......... ..

". '' .'.. '.'.... .

l v .-.. .. .

'- .
v... -v --'..='''''
0L v' .....'......

ORGANIC 02%, CLAY 03%,
PLANT REMAINS 02%.

ORGANIC 01%, PLANT
REMAINS 01%.

WELL SORTED. OCCASIONAL ROOTS.
CLAY 02%, HEAVY MINERALS 01%,-
IRON STAIN. SCATTERED GRANULE
TO GRAVEL SIZED FRAGMENTS OF
WELL INDURATED HARD ROCK
PHOSPHATE.

HEAVY MINERALS 01%.
AS ABOVE WITHOUT IRON STAIN.
NO SAMPLES RECOVERED.

CLAY 05-15%, HEAVY
MINERALS 01%, IRON STAIN.
ABUNDANT CLASTS OF HARD
ROCK PHOSPHATE (15-30%)
WEATHERED.

QTZ SAND 10%, CLAY 05%. GRAVEL
SIZED FRAGMENTS OF HARD ROCK
PHOS. IN SAND AND CLAY MATRIX.

W-16656
ALACHUA COUNTY, FL.
AUGER SITE FA-A7A
ELEVATION 80'.
T. 08S R. 17E S. 32 DA
LAT= N 29D 45M 06S
LON= V 82D 38M 10S
TOTAL DEPTH: 18.0',

0-14' UNDIFFERENTIATED
SAND AND CLAY
14'-TD. HAWTHORN GROUP

KEY

I I:;::: !ii FINE SAND

MEDIUM SAND

COARSE SAND

I ..... CLAY

I:-:':: -: -: ORGANICS

FII LIMESTONE

S o' PHOSPHATE

LITHOLOGIC WELL LOG PRINTOUT

WILL NUMBER: U- 16657 COUNTY GILCHRIST
TOTAL DEPTH: 00028 FT. LOCATION: T.09S R.16E S.24CD
28 SAMPLES FROM 0 TO 28 FT. LAT a N 290 41H 05
LOW W 820 39M 53
COMPLETION DATE 05/29/91 ELEVATION 087 FT
OTHER TYPES OF LOGS AVAILABLE NONE

OUNER/DRILLER: OUNER: LONCALA PHOSPHATE CO.; DRILLER: FGS.

WORKED BY: RICHARD GREEN AND KEN CAMPBELL 6/91; --AUGER SITE FA-A8--
CONTINUOUS SHELBY TUBE SAMPLES.

0. UNIFFERENTIATED SAND AND CLAY

0 .5 SAND; LIGHT OLIVE GRAY; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
ACCESSORY MINERALS: PLANT REMAINS-OSX, ORGANICS- X, CLAY-O1X;

.5- 3.5 SAND; VERY LIGHT ORANGE TO GRAYISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: PLANT REMAINS-O1X, HEAVY MINERALS-O1X, PHOSPHATIC SAND-O1X;

3.5- 4.5 SAND; VERY LIGHT ORANGE TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNONESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: ORGANICS-05X, HEAVY MINERALS-01X, CLAY-03X;

4.5- 5.5 SAND; DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: ORGANICS-01X, CLAY-01X, HEAVY MINERALS-01X;

5.5- 6.5 SAND; VERY LIGHT ORANGE TO DARK YELLOWISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): ORGANIC MATRIX;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: ORGANICS-01X, CLAY-01X;

6.5- 10.5 SAND; VERY LIGHT ORANGE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-01%, CLAY-O1X, ORGANICS-01X;
BECOMES LIGHTER IN COLOR WITH DEPTH.

SOURCE FGS

W- 16657 CONTINUED

10.5- 11.5 SAND; VERY LIGHT ORANGE TO GRAYISH ORANGE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: CLAY-01X, HEAVY MINERALS-01X;

11.5- 13.5 SAND; GRAYISH ORANGE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
CEMENT TYPE(S): CLAY MATRIX;
ACCESSORY MINERALS: CLAY-10X, HEAVY MINERALS-01X;

13.5- 17 SAND; GRAYISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
ACCESSORY MINERALS: CLAY-10X, HEAVY MINERALS-01X;

17 20 AS ABOVE
WITH ADDITION OF 3X CLAY, TRACE PHOSPHATE GRAINS AND SCATTERED BLEBS OF SLIGHTLY
PHOSPHATIC WHITE CLAY.

20 21 SAND; GRAYISH BROWN TO YELLOWISH GRAY; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;.
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
ACCESSORY MINERALS: CLAY-02X;
BLEBS OF WHITE CLAYEY SAND PRESENT.

21 25 SAND; VERY LIGHT ORANGE TO GRAYISH BROWN; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-01X, CLAY-05X;
GRANULE SIZED FRAGS. WELL INDURATED WHITE CLAYEY SAND. CLAY CONTENT VARIABLE.

25 27 SAND; VERY LIGHT ORANGE; INTERGRANUIAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; UNCONSOLIDATED;
ACCESSORY MINERALS: HEAVY MINERALS-01%, IRON STAIN-01X, CLAY-01X, CLAY-10%;
UNCONSOLIDATED TO POORLY INDURATED. VARIABLE CLAY CONTENT.

27 28 SAND; VERY LIGHT ORANGE TO WHITE; INTERGRANULAR, POSSIBLY HIGH PERMEABILITY;
GRAIN SIZE: FINE; RANGE: VERY FINE TO FINE;
ROUNDNESS: ROUNDED TO ANGULAR; MEDIUM SPHERICITY; POOR INDURATION;
SEDIMENTARY STRUCTURES: MOTTLED,
ACCESSORY MINERALS: CLAY-05X, HEAVY MINERALS-01X;
TRACE OF WHITE CLAY. VARIABLE CLAY CONTENT.

28 TOTAL DEPTH.

PAGE 2

SCALE
EE-Tt TERS

35

2

4

L -
: i .

S-,-4% .
p ,.M C--a

* a. '-. a-..
.---- "."

4I,* 'I
Mr .
y ''***>-

sr.*.*** -*-.*
-''*" '"

,, *11
Wi

.. .*,**.

O-ANT REMAINS OS%. CLAY 017.

PLANT REMAINS 01%, HEAVY
MINERALS 01%. PHOSPHATE
SAND 01%.

ORGANICS 05X. CLAY 03.,
HEAVY MINERALS 01%.

ORGANIC 01%X CLAY 01%,
HEAVY MINERALS 01%.

ORGANIC 01%X CLAY 01%,

HEAVY MINERALS 01%, CLAY 017.
ORGANIC 01X.

CLAY 017 HEAVY MINERALS 01%.

CLAY 10OX HEAVY MINERALS 0IX.

CLAY 10%, HEAVY MINERALS 01%.

AS ABOVE, WITH TRACE OF
PHOSPHATE AND SCATTERED
BLEBS OF SLIGHTLY PHOSPHATIC
WHITE CLAY.

91-9

CLAY o0%, BLEBS OF WHITE
CLAYEY SAND PRESENT.

CLAY OS%, HEAVY MINERALS 0bX.
VARIABLE CLAY CONTENT. GRANULE
SIZED FRAGMENTS OF WHITE CLAYEY
SAND PRESENT.

CLAY 01-10%, IRON STAIN 01%,
HEAVY MINERALS 01%.

CLAY 05%O HEAVY MINERALS 01%.
VARIABLE CLAY CONTENT.

W-16657
GILCHRIST COUNTY, FL.
AUGER SITE FA-A8
ELEVATION 87'.
.T. 09S R. 16E S. 24 CD
LAT= N 29D 41M 05S
LON= W 82D 39M 53S
TOTAL DEPTH, 28.0'.

O-T.D. UNDIFFERENTIATED
SAND AND CLAY

KEY

Li : FINE SAND

ti MEDIUM SAND

fi COARSE SAND

-e -- cLAY

*I::: ':: : ORGANIC

[ I I LIMESTONE

j^e^p PHOSPHATE

i

I

FLRD GEOLOSk ( IC SUfRiW

COPYRIGHT NOTICE
[year of publication as printed] Florida Geological Survey [source text]

The Florida Geological Survey holds all rights to the source text of
this electronic resource on behalf of the State of Florida. The
Florida Geological Survey shall be considered the copyright holder
for the text of this publication.

Under the Statutes of the State of Florida (FS 257.05; 257.105, and
377.075), the Florida Geologic Survey (Tallahassee, FL), publisher of
the Florida Geologic Survey, as a division of state government,
makes its documents public (i.e., published) and extends to the
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Florida's Smathers Libraries, rights of reproduction.

The Florida Geological Survey has made its publications available to
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All uses, excluding those made under "fair use" provisions of U.S.
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restricted. Contact the Florida Geological Survey for additional
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	Title Page
	Introduction and geology
	Stratigraphy
	Methods
	Results
	Conclusions
	References
	Appendix: Lithologic logs and stratigraphic...

MILLISECOND	CLASS.METHOD	MESSAGE
0	sobekcm_page_globals.constructor
0	sobekcm_page_globals.constructor	Application State validated or built
0	sobekcm_database.verify_item_lookup_object
0	sobekcm_page_globals.constructor	Navigation Object created from URI query string
0	sobekcm_database.verify_item_lookup_object
0	sobekcm_page_globals.display_item	Retrieving item or group information
0	sobekcm_page_globals.get_entire_collection_hierarchy	Retrieving hierarchy information
0	sobekcm_assistant.get_entire_collection_hierarchy
0	cached_data_manager.retrieve_item_aggregation
0	cached_data_manager.retrieve_item_aggregation	Found item aggregation on local cache
0	item_aggregation_builder.get_item_aggregation	Found 'all' item aggregation in cache
0	system.web.ui.page.page_load (ufdc.page_load)
0	sobekcm_page_globals.constructor.on_page_load
0	html_echo_mainwriter.add_style_references	Adding style references to HTML
0	html_echo_mainwriter.add_text_to_page	Reading the text from the file and echoing back to the output stream
33	html_echo_mainwriter.add_text_to_page	Finished reading and writing the file