"Freeze-Dried Specimens"

Light gray, earthy.

Brownish gray, kerogen-rich; commercial oil source.

Gray andesite with phenocrysts of felspar and/or hornblende.

Introduce your students to rocks formed from deposition of sediment.

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

Earthy, porous calcareous tufa.

Buff-colored, coarse, detrital limestone, with cemented shell fragments.

Introduce your students to rocks formed metamorphism of other rocks.

Coarse grained and abundant in plagioclase feldspar.

Fine, common limestone; massive, and will fizzle with HCl.

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