"Ward's Phenomena Lab Activities"

Red-brown to gray, coarse-grained, containing feldspar and mica.

Gray and poorly sorted, with a gritty texture.

Gray to brown mudstone with abundant silt.

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

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

Dark, waxy, bitumin-rich.

Brownish black, intermediate stage between peat and bituminous coal.

Gray with line crinoid columnal fragments.

Cemented glacial gravel.

Small, rounded pebbles and tightly cemented granules.