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Knox Group undifferentiated

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Light-gray to light-brown locally sandy dolomite, dolomitic limestone, and limestone; characterized by abundant light-colored chert.
State Alabama
Name Knox Group undifferentiated
Geologic age Ordovician-Cambrian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Sedimentary > Carbonate > Dolostone
Minor
Sedimentary > Chemical > Chert
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 DeKalb - Etowah - Jackson - Saint Clair