Type Formation Primary Dolostone Underlies Powell Formation | Country United States Overlies Jefferson City Formation | |
Other Chert, sandstone, shale Named for Cotter, Baxter County, Arkansas Regions Arkansas, Missouri, Virginia | ||
The Cotter Formation is a geologic formation in Arkansas Missouri and in Virginia. It preserves fossils dating back to the Ordovician period.
References
Cotter Formation Wikipedia(Text) CC BY-SA