| Simpson Group | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Group |
| Sub-units | Bromide Formation |
| Location | |
| Region | Oklahoma |
| Country | United States |
The Simpson Group is a geologic group in Oklahoma. It preserves fossils dating back to the Ordovician period.
The Hogshooter 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 Nellie Bly Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Skiatook Group is a geologic group 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 as far as the Carboniferous period.
The S. Oklahoma Ardmore Basin Group is a geologic group in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Deese Group is a geologic group in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Dornick Hills Group is a geologic group in Oklahoma. It preserves fossils dating back to the Carboniferous period.
The Hunton Group is a stratigraphic group in Oklahoma. It preserves fossils dating back to the Devonian period.
The Viola Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Ordovician period.
The Ada Formation is a geologic formation in Oklahoma, within and to west of Ada. It consist mainly of shale with numerous limestone layers which get thinner and eventually disappear to the south, where they are replaced by fine-grained sandstone. Fossils are rare. Disarticulated remains of Eryops, Diasparactus, and Ophiacodon from the Ada Formation represent the first finds of these genera in Oklahoma.
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 Roadian stage of the Middle Permian. These include, among others, the dissorophoid temnospondyl Nooxobeia gracilis, the lepospondyl Diplocaulus parvus, and the captorhinid Rothianiscus robusta, initially called Rothia robusta by Olson.
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 Arbuckle Group is a geologic group in Oklahoma. It preserves fossils dating back to the Ordovician period.
The El Reno Group is a geologic group in Oklahoma. It preserves fossils dating back to the Permian period.
The Leonard Series is a geologic group in Oklahoma. It preserves fossils dating back to the Permian period.
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