| details |
Campanian |
Pleistocene |
Worldwide |
Muller,J. Fossil pollen records of extant angiosperms. |
1981 |
| details |
Late Paleocene |
|
Wyoming |
Pocknall,D.T. Composition of plant communities in and near Late Paleocene Coal swamps, Fort Union Formation, Powder River System, Wyoming-Montana. |
1986 |
| details |
Paleocene |
Eocene |
Wyoming |
Sarnecki,J.C. Palynology and paleoecology of coal sections of the Upper Fort Union and Lower Wasatch Formations, Spotted Horse Coal Field, Campbell County, Wyoming. |
1981 |
| details |
Middle Eocene |
|
Wyoming |
Bradley,W.H. Geology of the Green River Formation and associate Eocene rocks in Southwestern Wyoming and adjacent parts of Colorado and Utah. |
1964 |
| details |
Middle Eocene |
|
Wyoming |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Paleocene |
Early Eocene |
Wyoming |
Wing,S.L. A new basis for recognizing the Paleocene/Eocene boundary in Western Interior North America. |
1984 |