Ada Formation
The Ada Formation is a geologic formation in Oklahoma, within and to west of Ada.[1] 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.[2] Disarticulated remains of Eryops, Diasparactus, and Ophiacodon from the Ada Formation represent the first finds of these genera in Oklahoma.[3]
| Ada Formation Stratigraphic range: Late Pennsylvanian | |
|---|---|
| Type | Formation |
| Location | |
| Region | Oklahoma |
| Country | United States |
| Type section | |
| Named for | Ada, Pontotoc Co, OK |
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 2014-07-31. Retrieved 8 July 2014.
- USGS. "Ada Group or Ada Formation". Mineral Resources On-Line Spatial Data. Retrieved 2016-02-18.
- Kissel, Richard A.; Lehman, Thomas M. (2002). "Upper Pennsylvanian Tetrapods from the Ada Formation of Seminole County, Oklahoma". Journal of Paleontology. 76 (3): 529–545. JSTOR 1307163.
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