"Specimens"

Pink and gray bands, with biotite; shows good foliation.

Fine to medium-grained with biotite.

Medium-grained with biotite.

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

Earthy, porous calcareous tufa.

Buff-colored, coarse, detrital limestone, with cemented shell fragments.

Buff, coarse, crystalline “Austin Marble” with shell casts and molds.

Gray with line crinoid columnal fragments.

Light gray, earthy.

Gray to buff, with numerous ooliths and fossil fragments.

Dense and massive.

Gray to white, coarse crystalline, carbonate rock.

Pink/gray coarse carbonate rock.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Banded volcanic glass.

Glassy; most specimens float in water.