"Ward's Phenomena Lab Activities"

Designed for Introductory College Petrography Labs

Specimens to supplement the most widely-used college lab manual for physical geology.

Light gray, fine-grained, well-foliated, schistose.

Red-brown to gray, coarse-grained, containing feldspar and mica.

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

Massive, chlorite-rich.

Dark, coarse-grained, and composed chiefly of hornblende.

Gray and poorly sorted, with a gritty texture.

Coarse grained and abundant in plagioclase feldspar.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.