Bouguer anomaly map of the Florida Peninsula and adjoining continental shelves ( FGS: Map series 57 )
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF90000317/00001
 Material Information
Title: Bouguer anomaly map of the Florida Peninsula and adjoining continental shelves ( FGS: Map series 57 )
Series Title: ( FGS: Map series 57 )
Physical Description: 1 map : col. ; 58 x 74 cm. on sheet 94 x 61 cm.
Language: English
Creator: Oglesby, Woodson R
Ball, M. M ( Mahlon M. ), 1931-
Chaki, Susan ( joint author )
Florida -- Bureau of Geology
Publisher: Fla. Dept. of Natural Resources, Bureau of Geology
Place of Publication: Tallahassee
Publication Date: [1973?]
Subjects / Keywords: Gravity anomalies -- Maps -- Florida   ( lcsh )
Continental shelf -- Maps -- Florida   ( lcsh )
Maps -- Florida   ( lcsh )
Gravity anomalies -- 1:1,000,000 -- Florida -- 1973   ( local )
Continental shelf -- 1:1,000,000 -- Florida -- 1973   ( local )
Gravity anomalies -- 1:1,000,000 -- Florida -- 1973   ( local )
Continental shelf -- 1:1,000,000 -- Florida -- 1973   ( local )
1:1,000,000 -- Florida -- 1973   ( local )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
single map   ( marcgt )
Maps   ( lcsh )
Statement of Responsibility: by W. R. Oglesby, M. M. Ball, and Susan Chaki.
General Note: Includes text.
Funding: Map series (Florida. Bureau of Geology) ;
 Record Information
Source Institution: University of Florida
Holding Location: George A. Smathers Libraries, University of Florida
Rights Management:
The author dedicated the work to the public domain by waiving all of his or her rights to the work worldwide under copyright law and all related or neighboring legal rights he or she had in the work, to the extent allowable by law.
Resource Identifier: aleph - 001824688
oclc - 07691788
notis - AJP8721
lccn - 80695130 /MAPS
System ID: UF90000317:00001

Full Text

published by BUREAU OF GEOLOGY



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SBy Ma.
W.R.Oglesby,' M. M. Ball2 and Susan Chak 13

This map was prepared from data supplied by the deposition of alternating carbonate-evaporite cyclothems EXPLANATION
Department of Defense Gravity Library and incorporates the occurred in the region of the positive anomaly in the Lower +62
previous data published as Map Series No. 41, 1971, by the Keys leading into the basin, where barrier reefs were lacking. POSITIVE --- 2 Contour Interval 4 milligals
Bureau of Geology, Florida Department of Natural The northeast flank of the minimum anomaly west of Fort ANOMALY
r- Resources. The density value employed to correct the Free Myers is underlain by anhydrite. The Lee County minimum INCREASE Base of the Continental Slope
0 Air values to the Bouguer Anomaly values is 2.0, except in was tested to the basement at Lehigh Acres where diabase +30
G) the extreme Southwest corner of the map (uncolored) where was recovered in cores. It is assumed the diabase was a dike
0- a density of 2.67 was used. This increase in density value was or sill, probably cutting a rhyolitic mass. The density of
r, selected for the small area beyond the continental slope, rhyolite, approximately 2.65, is considerably less than the
C where the shelf sediments are missing. average density of the sediments at depth in the Lower 2
It is interesting to compare the present map with one Cretaceous (limestones of densities of 2.73 and anhydrite, I
contained in Map Series No. 19 (1965, Florida Division of density 2.94). This is sufficient contrast to account for the
-< Geology), an isopachous map of the Sunniland Limestone of minimum gravity anomalies. The age of the rhyolite has been
the South Florida Basin. The similarity between the two determined by Potassium-Argon ratio as Late Triassic or 2NEGATIVE
D maps suggests that the large minimum area located in the Early Jurassic. The diabase is dated early Jurassic. The NEGATIVE FLORIDA DEPARTMENT OF NATURAL RESOURCES
t Gulf of Mexico west of Fort Myers may be favorably located rhyolite may have been expressed as topographically high ANOMALY BUREAU OF GEOLOGY ,/" -
ar. for Lower Cretaceous reef build-up. The minimum area cast areas during the Lower Cretaceous period, which offered INCREASE
. I of Miami in the Straits of Florida may also contain Lower favorable environment on which the reefs developed. -30 This public document was promulgated at a total cost of
Cretaceous reefing. Northward beyond the confines of the $485.00 or a per copy cost of $0.485 for the purpose of
(Ii South Florida Basin, the minimum anomalies are not Bureau of Geology disMemiating oologic data. o re p o
iU) associated with Lower Cretaceous reef build-up, as the Rosentiel School of Marine and Atmospheric Sciencen a- .
Sunniland Limestone is in fact absent. It appears that marine University of Miami
influx into the South Florida Basin during Cretaceous Bureau of Geology