REVIEW OF THE GEOLOGY OF FLORIDA 
WITH SPECIAL REFERENCE TO STRUCTURAL CONDITIONS 
By E. H. SELLARDS. 
The First Annual Report of the Florida Geological Survey, 
issued in 1908, contains a brief sketch of the geology of Florida. 
In the same volume was included an account of the geological in¬ 
vestigations that had been made in the State previous to the or¬ 
ganization of the State Geological Survey, and also a bibliography 
of publications on Florida geology to the year 1907. In the pres¬ 
ent publication, the Twelfth Annual Report of the Survey, will be 
given a sketch of the geology of the State as understood at the 
present time, to which is added a supplement to the bibliography 
previously given. In the interpretation of the geologic problems 
of the State there is now available not only the investigations 
made by the Florida Geological Survey during the twelve years that 
have elapsed since the Survey was established, but also investi¬ 
gations by other organizations, among which in particular should 
be mentioned the U. S. Geological Survey through the division of 
Coastal Plains Geology. In addition there have been many indi¬ 
vidual scientists, as recorded in the bibliography, who have con¬ 
tributed to a knowledge of the geology of the State. It is a pleas¬ 
ure to acknowledge indebtedness to all these sources for informa¬ 
tion that has been used in this report. 
It will not be the purpose in the present paper to present details 
that have been previously published in regard to formations, but 
rather to present general conclusions, and to give in particular the 
data that is available on structural conditions in the State. Of 
great value in this study is the report, on sub-structure based on 
well cuttings, made by Dr. J. A. Cushman, in this volume. 
To those who have seen Florida but casually it may seem that 
the geology of the State is entirely obscured beneath the sand, soil 
and vegetation of the prevailingly level surface. But to those 
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