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Nichols Formation

Nichols Formation - massive to laminated greenish-gray and black micaceous mudstone containing minor interbeds of siltstone and very fine-grained sandstone.
State Alabama
Name Nichols Formation
Geologic age Cambrian
Primary rock type mudstone
Secondary rock type siltstone
Other rock types sandstone
Lithologic constituents
Major
Sedimentary > Clastic > Mudstonemassive to laminated greenish-gray and black micaceous mudstone
Minor
Sedimentary > Clastic > Sandstone (Bed)very fine-grained sandstone
Sedimentary > Clastic > Siltstone (Bed)
Map references
Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.
Unit references
Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.
Counties Calhoun - Cherokee - Cleburne