|Name||Tuscumbia Limestone and Fort Payne Chert undivided|
Sedimentary > Carbonate > Limestone (Bed)Tuscumbia Limestone - light-gray partly oolitic limestone; very coarse bioclastic crinoidal limestone common; Fort Payne Chert - very light to light-olive-gray, thin to thick-bedded fine to coarse-grained bioclastic (abundant pelmatozoans) limestone & shaly limestone.
Sedimentary > Clastic > Siltstone (Bed)Fort Payne Chert - Upper part of formation locally consists of light-bluish-gray laminated siltstone containing vugs lined or filled with quartz.
Sedimentary > Clastic > Mudstone > Shale (Bed)Fort Payne Chert - scattered throughout the formation are interbeds of medium to greenish-gray shale, shaly limestone; lenses of dark-gray siliceous shale occur locally at the base of the Fort Payne in Wills Valley.
Sedimentary > Clastic > Mudstone > Claystone (Bed)Commonly present below the Fort Payne is a ligh-olive-gray claystone or shale (Maury Formation) which is mapped with the Fort Payne.
Sedimentary > Chemical > Chert (Bed)Tuscumbia Limestone - light-gray chert nodules and concretions locally abundant; Fort Payne Chert - abundant nodules, lenses and beds of light to dark-grey chert.
Szabo, M.W., Osborne, E.W., Copeland, C.W. Jr., and Neathery, T.L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.
|Counties||Blount - DeKalb - Etowah - Jackson - Jefferson - Marshall|