| details |
Late Cretaceous |
Miocene |
Washington |
Hopkins,W.S. Palynology of Tertiary rocks of the Whatcom Basin, southwest British Columbia, and northwest Washington. |
1966 |
| details |
Late Cretaceous |
Miocene |
Canada(British Columbia) |
Hopkins,W.S. Palynology of Tertiary rocks of the Whatcom Basin, southwest British Columbia, and northwest Washington. |
1966 |
| details |
Late Cretaceous |
Tertiary |
Canada |
Radforth,N.W. et al. Floral transgression of major geological time zones. |
1956 |
| details |
Middle Eocene |
Late Eocene |
Canada(British Columbia) |
Hopkins,W.S. Palynology of the Eocene Kitsilano Formation, Southwest British Columbia. |
1969 |
| details |
Eocene |
|
Wyoming |
Santucci,V.L. The Yellowstone Paleontological Survey. |
1998 |
| original |
Middle Eocene |
|
Colorado |
Wodehouse,R.P. Tertiary pollen II. The oil shales of the Eocene Green River Formation |
1933 |