Doughnut Formation
Doughnut Formation er en Upper Mississippian[klargjør] geologisk enhet i det vestlige USA. Diskefossiler er blitt oppdaget i shale outcrops[klargjør] av denne formasjon i Dinosaur National Monument.[1]
Referanser rediger
- ^ 22Bighorn Canyon National Recreation Area, Dinosaur National Monument and Buffalo National River (additional Mississippian fossil fish), Hunt, Santucci, og Kenworthy (2006); side 64.
Litteratur rediger
- 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.