This article contains a list of fossil-bearing stratigraphic units in the state of Oklahoma, U.S.
Nannospondylus is an extinct genus of dvinosaurian temnospondyl within the family Trimerorhachidae. It is known from the Chickasha Formation in Oklahoma.
The St. Clair Limestone is a geologic formation in Arkansas, Indiana, Missouri, and Oklahoma. It preserves fossils dating back to the Silurian period. This high density, high magnesium dolomitic limestone was originally classified as a marble in Oklahoma due to the fact that it would hold a high polish, hence Marble City.
The McCully Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Morrow Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Gene Autry Shale is a geologic formation in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Nellie Bly Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Krebs Group is a geologic group in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Joins Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Ordovician period.
The Viola Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Ordovician period.
The Blaine Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Permian period.
The Chickasha Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Permian period.
The Dog Creek Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Permian period.
The Duncan Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Permian period.
The Flowerpot Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Permian period.
The Hennessey Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Permian period.
The Garber Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Permian period.
The Whitehorse Formation is a geologic formation in Nebraska and Oklahoma. It preserves fossils dating back to the Permian period.
The Henryhouse Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Silurian period.
The Arbuckle Group is a geologic group in Oklahoma. It preserves fossils dating back to the Ordovician period.
The Simpson Group is a geologic group in Oklahoma. It preserves fossils dating back to the Ordovician period.
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