20 
FLORIDA GEOLOGICAL SURVEY. 
'Table 
Cenozoic 
Mesozoic 
Paleozoic 
Proterozoic 
Archeozoic 
of Geological Time Divisions, Showing Forma¬ 
tions Present in Florida. 
Recent.... 
Pleistocene 
Pliocene... 
Miocene... 
Oligocene.. 
^ Eocene- 
( Cretaceous. 
I Jurassic... 
I Triassic... 
Permian... 
Carbonifer¬ 
ous 
<j Devonian.. 
Silurian... 
Ordovician. 
Cambrian.. 
( With subdi- 
| visions... 
( With subdi- 
) visions... 
Represented in f Sand -<J>mes, shell-mounds, 
Florida by.... \ Indiai1 remains, leading to 
l the present time. 
Represented in 
Florida by.. 
s Columbia sands, 
J Marine shejlrock, 
L Miami Oolite. 
( Represented in ^ Lafayette formation, 
l Florida by.... ^ Caloosahatchee beds. 
Represented in 
Florida by. 
Chesapeake Miocene. 
Represented in 
Florida by. 
f Upper Oligocene (Chatta- 
I hoocbee and C b i p o 1 a 
groups), Lower Oligocene, 
(Vicksburg and Ocala 
Limestones.) 
{ Not known 
l in Florida.... 
f Not known 
| in Florida.... 
Not known 
in Florida.... 
Not known 
in Florida.... 
( Not known 
{ in Florida.... 
( Not known 
( in Florida.... 
It is probable that the 
Eocene occurs in Florida 
underlying the Oligocene at 
some considerable depth. 
This inference is based on 
the occurrence of Eocene 
limestone to the north and 
west which dips toward the 
south beneath Oligocene 
limestone. It is possible 
also that Cretaceous rocks 
occur at still greater depth 
below the Eocene. There is 
at present no basis on 
which to judge the pres¬ 
ence or absence of yet older 
formations beneath the 
Florida peninsula with the 
possible exception of the 
Archeozoic, which is pre¬ 
sumably world-wide in its 
occurrence. 
