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Gray with line crinoid columnal fragments.

Well-cemented, medium-grained orthoquartzite.

Black, fissile; commonly with carbonized fossil plant impressions.

Gray, fine to medium-grained “Berea grit”.

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Fine, common limestone; massive, and will fizzle with HCl.

Small, rounded pebbles and tightly cemented granules.

Earthy, porous calcareous tufa.

Buff-colored, coarse, detrital limestone, with cemented shell fragments.

Buff, coarse, crystalline “Austin Marble” with shell casts and molds.