"Freeze-Dried Specimens"

Light gray, fine small clasts.

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

Chlorite-bearing.

Gray to white, coarse crystalline, carbonate rock.

Fine crystalline, pure calcite.

Gray, fine, friable, with abundant small sanidine crystal fragments.

Grayish black trap rock.

Gray with line crinoid columnal fragments.

Glassy; most specimens float in water.

Represents a Wide Range of Depositional Environments and Rock Textures

Dark gray, composed mostly of pyroxene and olivine.

Gray and poorly sorted, with a gritty texture.

Ideal for Beginning Earth Science Students

Study the Formation of Different Igneous Rocks

Indicative of Various Sedimentary Formation Processes