| details |
Late Neogene |
|
Wyoming |
Love,J.D. Reconnaissance study of Quaternary Faults in and South of Yellowstone National Park, Wyoming |
1961 |
| details |
Oligocene |
|
Montana |
Hamilton,W. et al. Volcanic rocks of Oligocene age in the southern part of the Madison Range, Montana and Idaho. (In: Geological Survey research 1962, Short Papers in geology, hydrology and topography. Articles 1-59) |
1962 |
| details |
Middle Miocene |
|
Colorado |
Leopold,E.B. Late Cenozoic palynology. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) |
1969 |
| details |
Early Pliocene |
|
Wyoming |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Middle Pliocene |
|
Wyoming |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Oligocene |
Early Miocene |
Colorado |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Pliocene |
|
Idaho |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Pliocene |
Early Pleistocene |
Idaho |
Leopold,E.B. et al. Pollen profiles of the Plio - Pleistocene transition in the Snake River Plain, Idaho. (In: Late Cenozoic history of the Pacific Northwest, interdisciplinary studies on the Clarkia fossil beds of Northern Idaho. C.J.Smiley, editor) |
1985 |
| details |
Late Cenomanian |
|
Alaska |
Foster,H.L. et al. Fossil pollen from nonmarine sedimentary rocks of the eastern Yukon-Tanana Region, East-Central Alaska. (In: Geologic studies in Alaska by the U.S. Geological Survey,1989) |
1990 |
| details |
Barstovian |
|
Wyoming |
Montagne,J. Cenozoic history of the Saratoga Valley area, Wyoming and Colorado. |
1991 |
| details |
Quaternary |
|
Wyoming |
Santucci,V.L. The Yellowstone Paleontological Survey. |
1998 |