"WardsSci000452"

Well-cemented, medium-grained orthoquartzite.

Buff-colored, coarse, detrital limestone, with cemented shell fragments.

Light gray, earthy.

Brownish gray, kerogen-rich; commercial oil source.

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

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

Black, fissile; commonly with carbonized fossil plant impressions.

Dense and massive.

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Small, rounded pebbles and tightly cemented granules.