"Ward's Phenomena Lab Activities"

Pale pink felsite, with small sanidine phenocrysts.

Pink/gray coarse carbonate rock.

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

Dark gray with abundant gas pocket vesicles.

Earthy, porous calcareous tufa.

Lustrous, black 'hard coal'.

Brownish black, intermediate stage between peat and bituminous coal.

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

Grayish black trap rock.

Gray with line crinoid columnal fragments.