A PRELIMINARY REPORT ON CLAYS OE ELORIDA 
107 
CHAPTER VII 
GEOLOGY OF THE CLAYS OF FLORIDA 
stratigraphy 
The formations exposed at the surface in Florida are all of the 
younger periods, ranging from Eocene to Recent, as may be seen from 
the accompanying table. Each period of the territory is represented and 
each contains clay to a greater or less extent. 
TABLE OF GEOLOGIC FORMATIONS IN FLORIDA 
ERA 
PERIOD 
FORMATION 
THICK¬ 
LITHOLOGIC 
RE- 
NESS 
DESCRIPTION 
MARKS 
Recent 
Recent 
? 
Sands and Clays 
Palm Beach Limestone 
? 
Marine Limestone 
. e_ 
U 
cd 
Miami Oolitic Limestone 
? 
Marine Limestone 
M.o ^ 
es 
u 
Pleistocene 
Key Largo Limestone 
? 
Marine Limestone 
c 
; 
i 'll £ 
<D 
C3 
Key West Limestone 
? 
Marine Limestone 
cn u u 
y £ 
a 
Lostmans River Limestone 
? 
Marine Limestone 
o <u 
cs ^ ~a 
Fort Thompson Beds 
? 
Freshwater and 
Marine Beds 
x Er c 
w 2 3 
Lafayette Formation 
? 
Sands, Gravels 
and Clavs 
tn 
3 
O 
Citronelle Formation 
? 
Sands, Gravels 
and Clays 
V o> 
C 
C3 
o 
Pliocene 
Bone Valley Formation 
o 
o 
t-H 
n-o 
Pebble Phosphate, 
Gravel, Clay, 
Sand 
a, 
6 
V 
r o 
Alachua Clay Formation 
100+ 
Non-Marine Clays 
O 
Caloosahatchee Formation 
o 
o 
o 
Marine Marls 
"<u 
Nashua Marl Formation 
0-100' 
Marine Marls 
fcuo 
*-< 
C3 
cd 
*■*-> 
Charlton Marl Formation 
? 
Marine Marls 
J 
QJ 
H 
Choctawhatchee Formation 
20'-50' 
Chiefly Marls 
i 
Con- 
>■ tem¬ 
po ra- 
Jacksonville Formation 
? 
Limestone, Clay 
j 
Miocene 
Alum Bluff Formation 
100'-200' 
Sand, Gravel, 
Clay, Limestone, 
Fuller’s Earth 
neous 
Tampa Formation 
? 
Limestone, Clay 
] 
Con- 
Oligocene 
Chattahoochee Formation 
o 
o 
04 
o 
o 
Impure Limestone, 
Clay 
1 
L tem- 
[ pora- 
| neous 
Marianna Formation 
30+ 
Limestone 
> 
Eocene 
Ocala Formation 
20'-50' 
Limestone 
_ 
• EOCENE 
The Eocene is represented by the Ocala formation which is exposed 
chiefly on the western side of peninsular Florida from Pasco to Lafayette 
counties and also in the northwestern portion of the State in Jackson 
