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Claiborne Group; Tallahatta Formation

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White to very light-greenish-gray thin-bedded to massive siliceous claystone; interbedded with thin layers of fossiliferous clay, sandy clay, and glauconitic sand and sandstone. White to light-greenish-gray fine to coarse sand and fine gravel occur at the base of the formation in southwest Alabama (Meridian Sand Member).
State Alabama
Name Claiborne Group; Tallahatta Formation
Geologic age Eocene
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Minor
Unconsolidated > Coarse-detrital > Sand (Bed)glauconitic sand and sandstone.
Unconsolidated > Fine-detrital > Clay (Bed)interbedded with thin layers of fossiliferous clay, sandy clay.
Sedimentary > Clastic > Sandstone (Glauconitic)glauconitic sand and sandstone.
Incidental
Unconsolidated > Coarse-detrital > Gravel (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 Barbour - Butler - Choctaw - Clarke - Coffee - Conecuh - Covington - Crenshaw - Dale - Geneva - Henry - Houston - Monroe - Washington