"pathway PLASTICS, INC."

Classic, very coarse-grained igneous texture.

Dark gray, with hornblende as the dominant mafic mineral.

Coarse-grained plagioclase and pyroxene with some olivine.

Gray-to-brown basaltic, with over 50% vesicles.

Medium-grained with biotite.

Glassy; most specimens float in water.

Classic, dark; from the Columbia Plateau.

Dark gray, composed mostly of pyroxene and olivine.

Pale pink felsite, with small sanidine phenocrysts.

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