"WardsSci000452"

Small, rounded pebbles and tightly cemented granules.

Earthy, porous calcareous tufa.

Light gray, fine small clasts.

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

Brownish black, intermediate stage between peat and bituminous coal.

Hematite-cemented quartz; orthoquartzite.

Gray to brown mudstone with abundant silt.

Typical green-gray, fissile, clay-rich.

White, mature, friable.

Gray with line crinoid columnal fragments.