110 



DYNAMICAL GEOLOGY. 



Description of Reefs and Vicinity. Fig. 61, -4, is 



a map of Florida, its keys, reefs, etc., and Fig. 61, B, is a 

 section of the same along the line N 8. The southern 



FIG. 61. Map and section of Peninsula and Keys of Florida. In both, a = coast; 

 a' = Jteys ; a" reef ; e = everglade ; e' shoal water ; e" = ship-channel ; 

 GS = Gulf Stream. 



coast of Florida, a a, is a ridge of limestone, twelve to 

 fifteen feet high, inclosing a swamp called the Everglades, 

 e, only one to two feet above the sea-level, covered with 



