Stones River Groups undifferentiated in part

Medium to dark-gray thick to thin-bedded limestone, argillaceous in part, locally very fossiliferous. Contains a zone of bentonite and bentonitic shale near the top. Mapped seperately from the Nashville Group only in Jackson County.
State Alabama
Name Stones River Groups undifferentiated in part
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestonemedium to dark-gray thick to thin-bedded limestone, argillaceous in part, locally very fossiliferous
Incidental
Sedimentary > Clastic > Mudstone > Claystone > BentoniteContains a zone of bentonite and bentonitic shale near the top.
Sedimentary > Clastic > Mudstone > ShaleContains a zone of bentonite and bentonitic shale near the top.
References

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.

NGMDB product
Counties Jackson