| details |
Middle Eocene |
|
Utah |
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 |
Tertiary |
|
W.Germany(N.Rhine) |
Thiergart,F. A comparison of Coal Seams forming elements of the Tertiary of the Lower Rhine Basin with those of more or less equal age from Southern Africa and Asia based on pollen analysis. |
1964 |
| details |
Carboniferous |
Late Cretaceous |
Worldwide |
Srivastava,S.K. Cretaceous spore-pollen floras |
1978 |
| 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 |