"Freeze-Dried Specimens"

Hematite-cemented quartz; orthoquartzite.

Chlorite-bearing.

A variety of colorful collections to introduce rocks, minerals and fossils.

Gray to white, coarse crystalline, carbonate rock.

Lustrous, black 'hard coal'.

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.

Samples of Intrusive and Extrusive Igneous Rocks

White and black bands of quartz, feldspar, and biotite; typical foliation.

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Compact Plant Fiber Masses.

Black, fissile; commonly with carbonized fossil plant impressions.

Altered Igneous and Sedimentary Rocks are Clearly Represented