"Dessus de bouchon"

Gray, fine, friable, with abundant small sanidine crystal fragments.

Brownish gray, kerogen-rich; commercial oil source.

Massive, chlorite-rich.

Chlorite-bearing.

Coarse-grained plagioclase and pyroxene with some olivine.

Specially selected subsoil, 1 lb.

[NA_SciEd] Ward's® Sandstone (Red)

Specially selected topsoil, 1 lb.

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

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

Gray to brown mudstone with abundant silt.

Fightly cemented, medium-to-coarse quartz grains.

Hematite-cemented quartz; orthoquartzite.

Classic, dark; from the Columbia Plateau.

Pale pink felsite, with small sanidine phenocrysts.

Gray, fine-grained, massive contact rock.