"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.

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

Compact Plant Fiber Masses.

Black, soft; most widely mined.

Small, rounded pebbles and tightly cemented granules.

Gray and poorly sorted, with a gritty texture.

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