REVIEW OF THE GEOLOGY OF FLORIDA H9 
Thus over both the Eocene and the Oligocene of peninsular Flor¬ 
ida are found remnants of the Lower Miocene, indicating, prob¬ 
ably the former extension of the Alum Bluff formation over the 
entire State. No attempt has been made to show the Alachua for¬ 
mation which rests chiefly upon the Eocene of Alachua, Levy, 
Marion and Citrus counties; nor the Bone Valley formation which 
rests upon the Miocene of Polk and Hillsboro counties. The allu¬ 
vial Pleistocene deposits are likewise omitted from the map, and 
also the limited exposures of Pliocene (?) on the St. Mary’s River. 
STRUCTURAL CONDITIONS IN FLORIDA 
WEST FLORIDA. 
The structural conditions in that part of West Florida between 
the Choctawhatchee and Aucilla Rivers has been discussed in some 
detail in the Ninth, Tenth, and Eleventh Annual Reports. In those 
reports it is shown that a broad structurally high area centers be¬ 
tween the Choctawhatchee and Apalachicola Rivers, the axis being 
nearer probably to the Choctawhatchee than to the Apalachicola 
River. It is also shown that a broad shallow syncline lies between 
the Apalachicola and Ocklocknee Rivers, the axis of the syncline 
having apparently a general northeast southwest direction. East 
of the Ocklocknee River was noted likewise a slight structurally 
high area not well defined. To this data Cushman has now added 
the identification of the Lower Cretaceous at the depth of 325 feet 
(or higher) in the well of the Bonheur Development Company in 
Wakulla County east of the Ocklocknee River. In a well near 
Panama City west of the Apalachicola River he finds fossils sug¬ 
gesting the Oligocene at 300 feet and more doubtfully the Eocene 
at 400 feet. The description of the samples from this well, which 
has not heretofore been published, is as follows: 
Description of Samples from Well near Panama City, well located in 
N. W. V 4 , 23, T. 4 S., R 14 W. 
1-30 feet. Chiefly sand with some shell fragments. 
30-60 feet. Sample preserved as representative of this interval is a dark 
colored alum tasting clay, apparently the same clay exposed 
at Alum Bluff. 
