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Little Oak and Lenoir Limestones undifferentiated

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Little Oak and Lenoir Limestones undifferentiated - dark-gray argillaceous, fossiliferous medium to thick-bedded limestone; locally contains rare chert in upper part and an interval of fenestral mudstone in lower part (Mosheim Limestone Member of the Lenoir Limestone). Between Siluria and Pelham in Shelby County, the Little Oak and Lenoir Limestones are separated by a tongue of the Athens Shale.
State Alabama
Name Little Oak and Lenoir Limestones undifferentiated
Geologic age Ordovician
Primary rock type limestone
Secondary rock type mudstone
Other rock types chert
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)dark-gray argillaceous, fossiliferous medium to thick-bedded limestone
Minor
Sedimentary > Clastic > Mudstone (Bed)fenestral mudstone in lower part (Mosheim Limestone Member of the Lenoir Limestone).
Incidental
Sedimentary > Chemical > Chert (Bed)locally contains rare chert in upper part
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 - Etowah - Saint Clair - Shelby