Tuscumbia Limestone (ALMt;2)

Tuscumbia Limestone - Light-gray limestone, partly oolitic near top; fine to very coarse-grained bioclastic crinoidal limestone common; light-gray chert nodules and concretions are scattered throughout and are abundant locally. The apparent thickness of the formation in this province varies due to differential dissolution of the carbonate in the unit.

State	Alabama
Name	Tuscumbia Limestone
Geologic age	Mississippian
Original map label	Mt
Primary rock type	limestone
Secondary rock type	chert
Other rock types
Lithologic constituents	Major Sedimentary > Carbonate > LimestoneLight-gray limestone, partly oolitic near top; fine to very coarse-grained bioclastic crinoidal limestone common. Minor Sedimentary > Chemical > Chertlight-gray chert nodules and concretions are scattered throughout and are abundant locally
Map references	Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000. [http://www.ogb.state.al.us/ogb/ogb_gisdata/algeomap.zip]
Unit references	Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000. [http://www.ogb.state.al.us/ogb/ogb_gisdata/algeomap.zip]
Geographic coverage	Colbert - Jackson - Lauderdale - Lawrence - Limestone - Madison - Marshall - Morgan