"Sedimentary Rock Specimens"

Compact Plant Fiber Masses.

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

Black, soft; most widely mined.

Well-cemented, medium-grained orthoquartzite.

Gray and poorly sorted, with a gritty texture.

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

Light gray, earthy.

Brownish gray, kerogen-rich; commercial oil source.

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

Gray to tan clastic rock made of silt sized particles.