"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.

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.

Gray, fine to medium-grained “Berea grit”.

Dense and massive.

Red-brown to gray, coarse-grained, containing feldspar and mica.

Typical green-gray, fissile, clay-rich.

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

Includes: six each of conglomerate, sandstone and shale. Set of 18.

Common rocks and minerals for testing and identification studies are 2–3cm each.