PETROLEUM POSSIBILITIES OB FLORIDA 77 
Feet. 
Same; with Orbitoides (?); has siliceous strata... 749 - 755 
Same; with bits of shells, Bryozoa and Nummulites... 755 - 766 
Limestone, light brownish................... 781 - . .. 
Bits of Bryozoa... 800 - . .. 
Limestone, soft, brownish; with brown chert... 827 - 840 
Limestone, light brownish. 859 - 865 
Same; with Bryozoa.|._■. 876 - 881 
Same; gray, limey shale.1. 905 - 
Limestone, light brownish. 952 - 962 
Limestone, light brownish; with bits of shells and Bryozoa. 983 -1001 
The limestones in this well at the depth of 491 to 529 feet were identi¬ 
fied by Bassler as Eocene on the evidence of the Bryozoan fossils. 1 From 
the log it would appear probable that the Eocene limestones were en¬ 
tered at 470 feet. The thickness of the Eocene in this well is undeter¬ 
mined. 
THE TALLAHASSEE AREA 
From the Ocklocknee to the Suwannee River, exclusive of Hamilton 
County, is an area including Leon, Wakulla, Jefferson, Madison, Tay¬ 
lor, Lafayette and Dixie Counties, which may be known as the Talla¬ 
hassee Area. In this belt of country the Chattahoochee limestone is, as 
a rule, either at the surface or sufficiently near the surface to be occa¬ 
sionally exposed in deep sinks and stream beds, although near the Su¬ 
wannee River, in Dixie County, there are exposures of the Ocala forma¬ 
tion. Overlying the Oligocene is found more or less of the Miocene 
which formerly covered the area. Structurally, this area is believed to 
lie higher than does the area between the Ocklocknee and Apalachicola 
Rivers. 
Wells within this area start within, or but little above, the Chatta¬ 
hoochee formation. Beneath the Chattahoochee it would appear that no 
more than a thin development of Eocene limestone is present. Under¬ 
neath the Eocene, according to Cushman’s identifications, the Upper 
Cretaceous is entirely wanting, the drill passing at once from the Eocene 
into the Lower Cretaceous. 2 
The following record of a well located in Wakulla County indicates 
the character of the rocks to a depth of 2,169 feet: 
1 U. S. Geol. Surv., Water Supply Paper 319, p. 310, 1913. 
2 Fla. Geol. Surv., 12th Ann. Rept., p. 82, 1919. 
