"Sedimentary Rock Specimens"

Specially selected topsoil, 1 lb.

Great for biology and sediment studies.

Specially selected subsoil, 1 lb.

4 pounds of limestone chips supplied in a box.

Brownish gray, kerogen-rich; commercial oil source.

Light gray, earthy.

Gray to buff, with numerous ooliths and fossil fragments.

Mix designed to experiment with confined clay.

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

Cemented glacial gravel.