Skip to main content

Little Oak Limestone

Little Oak Limestone - dark-gray medium to thick-bedded fossiliferous, argillaceous to silty limestone containing chert nodules. Locally includes thin beds of bentonite in the upper part.
State Alabama
Name Little Oak Limestone
Geologic age Ordovician
Primary rock type limestone
Secondary rock type chert
Other rock types bentonite
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)dark-gray medium to thick-bedded fossiliferous, argillaceous to silty limestone
Minor
Sedimentary > Chemical > Chertchert nodules
Incidental
Sedimentary > Clastic > Mudstone > Claystone > Bentonite (Bed)
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.
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.
Counties Calhoun - Shelby