"Sedimentary Rock Specimens"

Great for biology and sediment studies.

Specially selected subsoil, 1 lb.

Specially selected topsoil, 1 lb.

4 pounds of limestone chips supplied in a box.

Gray to buff, with numerous ooliths and fossil fragments.

Brownish gray, kerogen-rich; commercial oil source.

Light gray, earthy.

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

Cemented glacial gravel.

Mix designed to experiment with confined clay.

Dark, waxy, bitumin-rich.

Compact Plant Fiber Masses.

Black, soft; most widely mined.

Well-cemented, medium-grained orthoquartzite.

Gray and poorly sorted, with a gritty texture.

Useful for weathering and erosion, soil formation, porosity and permeability, or other general earth science labs.