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

See also

• Earth sciences portal
• Oklahoma portal
• Paleontology portal

• List of fossiliferous stratigraphic units in Oklahoma
• Paleontology in Oklahoma