"Dessus de bouchon"

4 pounds of limestone chips supplied in a box.

Black, soft; most widely mined.

Gray to buff, with numerous ooliths and fossil fragments.

Gray to white, coarse crystalline, carbonate rock.

Brownish black, intermediate stage between peat and bituminous coal.

[NA_SciEd] Ward's® Sandstone (Red)

Chlorite-bearing.

Gray-to-brown basaltic, with over 50% vesicles.

Dark, coarse-grained, and composed chiefly of hornblende.

Pale pink felsite, with small sanidine phenocrysts.

Gray to brown mudstone with abundant silt.

Fightly cemented, medium-to-coarse quartz grains.

Hematite-cemented quartz; orthoquartzite.

Classic, dark; from the Columbia Plateau.

Dark gray with abundant gas pocket vesicles.

Light gray, fine small clasts.