"WardsSci000478"

Light gray, earthy.

Brownish gray, kerogen-rich; commercial oil source.

1 pound of black sand packaged in a heat-sealed bag.

Small, rounded pebbles and tightly cemented granules.

Represents a Wide Range of Depositional Environments and Rock Textures

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

Light gray, fine small clasts.

Hematite-cemented quartz; orthoquartzite.

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