126 Papers from the Marine Biological Laboratory at Tortugas. 



SOURCES OF MATERIAL. 



Table of Geologic Formations in Florida. 



O 



Period. 



Recent 



Pleistocene 



Group. 



Formation. 



Pliocene 



Miocene 



Oligocene 



Apalachicoia 

 Group 



Vicksburg 

 Group 



Lithologic description 

 of the formation. 



Human remains. Vermetusrock. 

 Beach sands. Coquina. Aeo- 

 lian deposits. Lacustrine de- 

 posits. Chemical deposits. Al- 

 luvial deposits. 



Palm Beach Limestone. . 



Miami oolite 



Key Largo limestone. . . . 

 Key West oolite 



Lostman River limestone 



Unconformity- 

 Lafayette .... 



Bone Valley gravel . 

 Alachua clay 



Nashua marl 



Caloosahatchee marl.. 



Unconformity (?) 



Jacksonville formation" 

 (East Coast) 



Choctawhatchee marl 

 (West Florida and St. 

 John'?. Valley) 



Unconformity 



Yellow sand. 



"Vermetus rock." 



Coquina. 



" Planorbis rock." 



Gray sand. 



Fossiliferous marls. 

 . Light-colored limestone with 

 sandy beds and loose sand. 



Light-gray to white oolitic 

 limestone, sandy in places. 



Coral limestone; reef rock. 



Light-gray to white oolitic lime- 

 stone. 



Dark to light, hard to friable, 

 limestone, sandy or marly in 

 places. 



Clay and sand with some pebbles , 

 color usually red or yellow. 



Light-colored gravel and marl, 

 containing phosphatic pebbles. 



Greenish sandy clay, weathering 

 yellow or red. 



Light-colored sandy shell marl. 



Light-colored sandy shell marl. 



Light-gray to white limestone 

 weathering light yellow. Light 

 gray to yellow clay and gray 

 sand. Some chert beds. 



Greenish to light-gray sandy 

 shell marl or greenish gray 

 clay. 



Alum Bluff formation . 



Chattahoochee forma- 

 tion (West Florida) 



Hawthorne formation 

 (Central Florida) 



Tampa formation 

 (South Florida) 



Unconformity — 

 Ocala limestone. 



Gray to green sands, clays and 

 fuller's earth. Limestone oc- 

 curs in some localities but it is 

 usually impure. 



Light-yellow to gray earthy 

 and siliceous limestones, some- 

 times cherty. Sand and clay 

 rare. 



Yellow limestones, often phos- 

 phatic. Greenish or reddish 

 sands. Green clays. 



Yellow limestone and greenish 

 .clays. Some chert nodules 

 and layers. 



Peninsula limestone (Central 

 Florida) 



Marianna limestone (Western 

 Florida) 



Soft, porous, light-gray to white 

 limestone with beds of marl 

 and layers of chert. 



Soft, porous, light-gray to white 

 limestone containing marl 

 beds and layers of chert. 



Soft, porous, light-gray to white 

 limestones containing some 

 marl and more rarely clay 

 beds. Layers of chert common. 



Silica. 

 The presence of siliceous sand in the northern portion of Biscayne 

 Bay is accounted for by similar material overlying the Miami oolite in 

 the adjacent regions, and by the streams emptying into the bay median- 



