"WardsSci000452"

Dense and massive.

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Light gray, fine small clasts.

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

Small, rounded pebbles and tightly cemented granules.

Earthy, porous calcareous tufa.

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.