Colvin Mountain Sandstone

Light-gray quartzose sandstone, pebbly in part. Locally contains thin beds of bentonite in the upper part.
State Alabama
Name Colvin Mountain Sandstone
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Clastic > Sandstonequartzose sandstone, pebbly in part
Minor
Sedimentary > Clastic > Mudstone > Claystone > Bentonite (Bed)Locally contains thin beds of bentonite in the upper part.
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 Calhoun - Etowah - Saint Clair