"WardsSci000452"

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.

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

Fine, common limestone; massive, and will fizzle with HCl.

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Black, fissile; commonly with carbonized fossil plant impressions.