"Ward's Phenomena"

Dark gray with abundant gas pocket vesicles.

Earthy, porous calcareous tufa.

Fine, common limestone; massive, and will fizzle with HCl.

Pale pink felsite, with small sanidine phenocrysts.

Coarse-grained, with microcline, biotite and horblende phenocrysts.

Pink/gray coarse carbonate rock.

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

Dark, waxy, bitumin-rich.

Brownish black, intermediate stage between peat and bituminous coal.

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