Specimens

Brownish gray, kerogen-rich; commercial oil source.

Small, rounded pebbles and tightly cemented granules.

Dark, waxy, bitumin-rich.

Gray, fine to medium-grained “Berea grit”.

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

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

Compact Plant Fiber Masses.

Gray to tan clastic rock made of silt sized particles.

Red clastic rock composed of sand sized particles and hematite.

Sale

Scoria is a dark-colored rock formed from lava with a high gas content.