The Doughnut Formation is an Upper Mississippian geologic unit in the western United States. Fish fossils have been discovered in shale outcrops of this formation in Dinosaur National Monument.[1]
Footnotes
- ↑ "Bighorn Canyon National Recreation Area, Dinosaur National Monument and Buffalo National River (additional Mississippian fossil fish)," Hunt, Santucci, and Kenworthy (2006); page 64.
References
- Hunt, ReBecca K., Vincent L. Santucci and Jason Kenworthy. 2006. "A preliminary inventory of fossil fish from National Park Service units." in S.G. Lucas, J.A. Spielmann, P.M. Hester, J.P. Kenworthy, and V.L. Santucci (ed.s), Fossils from Federal Lands. New Mexico Museum of Natural History and Science Bulletin 34, pp. 63–69.
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