| original |
Middle Eocene |
|
Colorado |
Wodehouse,R.P. Tertiary pollen II. The oil shales of the Eocene Green River Formation |
1933 |
| original |
Middle Eocene |
|
Utah |
Wodehouse,R.P. Tertiary pollen II. The oil shales of the Eocene Green River Formation |
1933 |
| details |
Middle Eocene |
Late Eocene |
Canada(British Columbia) |
Rouse,G.E. Plant microfossils from the Burrard Formation of Western British Columbia. |
1962 |
| details |
Middle Eocene |
|
Colorado |
Rouse,G.E. Plant microfossils from the Burrard Formation of Western British Columbia. |
1962 |
| details |
Middle Eocene |
|
Utah |
Rouse,G.E. Plant microfossils from the Burrard Formation of Western British Columbia. |
1962 |
| details |
Maestrichtian |
|
Mexico(Coahuila) |
Rueda-Gaxiola,J. Contribution to the palynologic and petrographic study of the Cretaceous Coal of the Sabina Basin, Coahuila, Mexico |
1967 |