"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”.

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.

Lustrous, black 'hard coal'.

Cemented glacial gravel.

Small, rounded pebbles and tightly cemented granules.

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

Compact Plant Fiber Masses.