"Ward's Phenomena Lab Activities"

Gray with line crinoid columnal fragments.

Light gray, fine small clasts.

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

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

Gray to buff, with numerous ooliths and fossil fragments.

Typical green-gray, fissile, clay-rich.

Well-cemented, medium-grained orthoquartzite.

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

Compact Plant Fiber Masses.