"Ward's Phenomena Lab Activities"

Small, rounded pebbles and tightly cemented granules.

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

Compact Plant Fiber Masses.

Light gray, earthy.

Brownish gray, kerogen-rich; commercial oil source.

Gray to buff, with numerous ooliths and fossil fragments.

Typical green-gray, fissile, clay-rich.

Well-cemented, medium-grained orthoquartzite.

Light gray, fine small clasts.

Buff, coarse, crystalline “Austin Marble” with shell casts and molds.