eee ey ee ss eee eee 
Oe Se ca) Paes ee Se ny, ee ee 
’ ae 
E. A. Smith— Geology of Florida. 293 
regions, and the disappearance of streams for many miles 
beneath the surface of the earth, while others come forth in all 
their fullness at once.” 
e also speaks of the large limestone springs, frequently 
impregnated with sulphuretted hydrogen. 
n volume i of the 2d series of this Journal, page 38, we 
- 
at the head of Tampa Bay, as hard, white, with an earthy 
texture, and apparently formed of decomposed and commin- 
uted shells; in some places it is soft and friable, very much 
resembling chalk. He states further, that he has noticed this 
rock at points more than one hundred and fifty miles distant 
from each other, and presenting the same lithological charac- 
valves, bivalves and echini; and he ascribes the great fertility 
of some of the sandy soils of the territory to the loose mar 
disseminated through it. 
_According to the author, there is another rock probably dip- 
ping beneath the limestone—a dark bluish, siliceous rock, of a 
compact texture, somewhat vesicular, the vesicles containing 
fossils petrified with wine-colored chaleedony. Other beds of 
marl, apparently of much more recent origin, extend along the 
shore at Fort Brooke 
aborigines of the country. In this paper the author makes a 
