The Bullion Creek Formation is a geologic formation in western North Dakota. It preserves bones and tracks of an extinct crocodile and other fossils of Late Paleocene age.Erickson, B.R., 2005. Crocodile and Arthropod Tracks from the Late Paleocene Wannagan Creek Fauna of North Dakota, USA. Ichnos, 12(4):3 03-308.
See also
List of fossiliferous stratigraphic units in North Dakota Paleontology in North Dakota
References