| |
| | Western Dakotas - References |
 | | Ashworth, A.C., 1985, The Oligocene age and the fluvial origin of the Chadron Formation reaffirmed by observations in the Little Badlands, Stark County, North Dakota: Proceedings of the North Dakota Academy of Science, v.40, p.17. |
 | | Hinds, J.S., 1983, Structural-stratigraphic framework and correlation of coal beds in the Tongue River and Sentinel Butte Members of the Fort Union Formation, Daglum 15-minute Quadrange, Billings, Stark, and Slope Counties, North Dakota: USGS Miscellaneous Field Studies Map MF-1345-A, Sheet 1 of 3. |
 | | Hoganson, J.W., 1986, Oligocene Stratigraphy of North Dakota, in Clausen, E.N., and Kihm, A.J., eds., Tertiary and Upper Cretaceous of south-central and western North Dakota; 1986 Field Trip [Guidebook]: Bismarck, ND, North Dakota Geological Society, p. |
| www.library.uiuc.edu /gex/bibs/westerndakotas.html (5583 words) |
|