"Sedimentary Rock Specimens"

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

Hematite-cemented quartz; orthoquartzite.

Brownish black, intermediate stage between peat and bituminous coal.

White, mature, friable.

Gray to brown mudstone with abundant silt.

Typical green-gray, fissile, clay-rich.

Buy Both the Thin Section Set and the Hand Specimen Set and Save!

Sale

Hardened natural cement of calcium carbonate that binds other material such as gravel, sand, clay, and silt.

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

Gray with line crinoid columnal fragments.