Merriam,-D.F.; Fuhr,-J.M.; Jenkins,-R.V.; Zimmerman,-P.J.  
	Pleistocene bedrock geology of Florida Bay, the Keys and 
	the Everglades.  BULL.-MAR.-SCI. 1989. vol. 44, no. 1, 
	pp. 519-520.

The Late Pleistocene Miami Limestone of southern Florida 
comprises three facies: bryozoan, coral and oolite. The coral 
facies of Miami is termed the Key Largo Limestone and the 
oolitic facies, the Miami Oolite (= Key West Oolite). The 
three facies interfinger locally and all are approximately 
130,000 ybp in age. The Florida Keys are an archipelago of 
elongate coral limestone islands, near-parallel to the 
present offshore reef, and extend from near Miami, Florida, 
southwest to Bahia Honda Key and continue under water as far 
west as the Dry Tortugas. Diamond-drill cores taken of the 
bedrock in Florida Bay reveal that the bryozoan facies 
underlies most of the Bay, but in a more complicated manner 
than previously suspected. Patch reef(s) occur locally in the 
Bay; one has been identified just east of East Key about 45+ 
feet thick. In other parts of the Bay, freshwater limestone 
has been observed. The bryozoan facies is composed of peletal 
packstones and grainstones and is so named because locally up 
to 70% of the rock may be composed of colonies of the 
bryozoan Schizoporella floridana . After bryozoans, pellets 
are the most abundant constituent; other important 
constituents are miliolids, peneroplids and ooids and locally 
the unit contains burrows and calcareous worm tubes.