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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

Fairmont Shale

Geologic Formation in OK, KS

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Lithology

Geologic Age

Permian (299.05 Ma – 252.23 Ma ago)

Geologic Unit Label

Pfa

WOODWARD- Red-brown blocky shale with some greenish-gray calcitic siltstones. Thickness ranges up to 160 feet. ENID- Mainly red-brown shale with many thin layers of calcitic siltstone in upper 60 feet (18 m). Thickness, about 150 feet (45 m). (Hennessey Group) OKLAHOMA CITY- Red-brown blocky shale; grades into “Garber Sandstone” at base. Thickness, 30 feet at Oklahoma City, 110 feet near Purcell, and 120 feet near Kingfisher. (Hennessey Group) ARDMORE-SHERMAN- Shale, red-brown, blocky; thickness, 40 to 80 feet, decreasing southward. (Hennessey Group).

— USGS

Captorhinikos chozaensis SPECIES

Gnathorhiza serrata SPECIES

Diplocaulus GENUS

Rhynchonkos GENUS

Lysorophus tricarinatus SPECIES

Taxonomy

Geographic Places

Geological Feature

Geologic Formation

Classified As

Geologic Formation

Fairmont Shale

Fairmont Shale

Fairmont Shale