"Specimens"

Bright blue crystalline veins and coatings in a matrix of mixed copper ore.

Classic “peacock” aluminum ore.

Cut black mica cleavage sheets.

Coarse-grained plagioclase and pyroxene with some olivine.

Dark gray, with hornblende as the dominant mafic mineral.

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.