Fig. 15. — Limestone in Lake Okeechobee between Observation and Rita 

 Islands. Exposed rt low \\ater. Concretionary phase. 



Fig. t6. — Limestone in the Everglades. On North New River Canal 30V-? 

 miles from Lake Okeechobee. 



Fig. 17. — Exposnre of the Chattahoochee formation in cut of the Atlantic 

 Coast Line Railroad near River Junction. 



54 



