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MAP

Topo

Rock Formations

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Topo

Ecoregions

Public Lands

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BASEMAPS

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Temperature

Smoke

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WEATHER

Shawnee Group (NEPAs;0)

Geologic Formation in NE

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Lithology

Limestone

Shale

Siltstone

Geologic Age

Pennsylvanian (323.6 Ma – 299.05 Ma ago)

Geologic Unit Label

PAs

Limestone, shale and siltstone. Limestone is dark gray to very light gray, yellowish gray, very thin bedded to massive bedded, and fossiliferous; locally the thin bedds are argillaceous other beds are oolitic and a few contain chert. Shale is medium gray, greenish gray, pale red, dark redish brown, black, sandy fossiliferous and calcareous; black shale in part is fissile. Siltstone is light gray to greenish yellow, massive, calcareous; locally sandy. Approx. max thickness 200 ft

— USGS

Taxonomy

Classified As

Geologic Formation