«CALC or MILE* 



Fig. I. — Sketch map to indicate general structural conditions in Florida: A, 

 Belt of country in which the Eocene formations, when present, lie above sea-level, 

 mostly from sea-level to as much as about loo feet above; B, Eocene formations below 

 sea-level; for the most part between o and 200 feet below. Doubtful territory for 

 both belts A and B is indicated by a question mark; C, Eocene formations probably 

 more than 200 feet below sea-level, varying from 200 feet to a maximum, so far as 

 known, of about 1,000 feet in the southern part of the peninsula. Figures entered on 

 the map record the approximate depth to the top surface of the Eocene, usually the 

 Ocala formation. The margins of the Floridian land mass are approximately coin- 

 cident with the loo-fathom contour, the location of which is indicated on the map. 

 The axis of the land mass is approximately indicated by the line a-a' . 



