"Freeze-Dried Specimens"

Compact Plant Fiber Masses.

Black, fissile; commonly with carbonized fossil plant impressions.

Light gray, earthy.

Brownish gray, kerogen-rich; commercial oil source.

Introduce your students to rocks formed from deposition of sediment.

Gray with line crinoid columnal fragments.

Represents a Wide Range of Depositional Environments and Rock Textures

Gray and poorly sorted, with a gritty texture.

Indicative of Various Sedimentary Formation Processes

Earthy, porous calcareous tufa.