152 FLORIDA GEOLOGICAL SURVEY—TWELFTH ANNUAL REPORT 
Page 
St. Johns County, samples from well in____ 79 
St. Johns River -in, 117 
St. Lucie canal, Caloosahatchee marl from__ 71 
St. Mary’s River, exposures on_._________119 
Sanford, depth to the Eocene at___-____J_ 125 
study of samples from well near___80, 90, 98, 99 
Santa Rosa County, topography of______ ; _ 107 
Saw grass ___ 67 
Sellards, E. H., ________,______80, 84, 94 
paper by ______ ----1, 67, 105 
referred to _____5, 9 
Seminole County, samples from well in _80, 90 
Sink-hole region of Florida -—______107, in 
Smith, E. A., ___ 131 
Sources of error in using data from well samples_ 79 
Southern Alabama, upper Eocene of____>.__92 
Southern States Lumber Company, samples from well of_120 
Spain, fossils from Florida correlated with those from_ 97 
Springs in Florida_—___**__in 
Stanton, T. W. ____,_80, 97 
State Drainage Commission-9, 68 
Strategus antaeus Fabr.___ 7 
Stratigraphy as shown by well samples _ 96 
Structural conditions in Florida _76, 105, 119, 120 
Structural map of Florida_,_128 
Sub-structure of Florida _._105, 119, 120 
Sub-structure of Lake Okeechobee _67, 74 
Surface run-off in Florida _in 
Sumter County, samples from well in _—80, 88, 121 
Suwannee River -in, 114, 123 
T. 
Table of geologic formations in Florida- 112 
Tampa, rainfall at _ no 
Tampa formation_82, 93, 95, 102, 114, 11 5 
age of -—- lI 4 
fossils characteristic of- 102 
Temperature in Florida- I0 9 
Texas, fossils from Florida correlated with those of--- 97 
Tiger Bay, study of samples from well at-80, 87, 94, 100, 101, 102 
depth to Lower Cretaceous at-- 98 
Topographic maps ________10, n, 108 
Topography of Florida- - io ^ 
