Ada Formation
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| Ada Formation | |
|---|---|
| Stratigraphic range: Late Pennsylvanian | |
| Type | Formation |
| Location | |
| Region | Oklahoma |
| Country | United States |
| Type section | |
| Named for | Ada, Pontotoc Co, OK |
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]
