Hematite-cemented quartz; orthoquartzite.
Gray to brown mudstone with abundant silt.
Typical green-gray, fissile, clay-rich.
Well-cemented, medium-grained orthoquartzite.
White, mature, friable.
Gray with line crinoid columnal fragments.
Buff, coarse, crystalline “Austin Marble” with shell casts and molds.
Gray, fine to medium-grained “Berea grit”.