"The Mystery of Lyle and Louise"

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

Gray, fine-grained, massive contact rock.

Gray to buff, with numerous ooliths and fossil fragments.

Lustrous, black 'hard coal'.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Brownish black, intermediate stage between peat and bituminous coal.

Unpolished metamorphic rock with silky lusture, red-brown colour, and clear parallel intergrown quartz crystals.

Vente

Chlorite-mica with perfect slaty cleavage.

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