Sequatchie Formation

Dusky-red to light-olive-gray siltstone, sandstone, shale, and dolomite, regular but uneven bedding.
State Alabama
Name Sequatchie Formation
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Minor
Sedimentary > Carbonate > Dolostone (Bed)
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