"WardsSci000452"

Great for biology and sediment studies.

4 pounds of limestone chips supplied in a box.

Mix designed to experiment with confined clay.

Cemented glacial gravel.

Compact Plant Fiber Masses.

Black, soft; most widely mined.

Gray and poorly sorted, with a gritty texture.

Buff-colored, coarse, detrital limestone, with cemented shell fragments.

Light gray, earthy.

Gray to buff, with numerous ooliths and fossil fragments.