"Activités de comprehensive"

4 pounds of limestone chips supplied in a box.

Black, soft; most widely mined.

Gray to buff, with numerous ooliths and fossil fragments.

Brownish gray, kerogen-rich; commercial oil source.

Brownish black, intermediate stage between peat and bituminous coal.

Specially selected subsoil, 1 lb.

Specially selected topsoil, 1 lb.

Gray to brown mudstone with abundant silt.

Hematite-cemented quartz; orthoquartzite.

Light gray, fine small clasts.