| details |
Middle Eocene |
|
Utah |
Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. |
1931 |
| details |
Middle Eocene |
|
Utah |
Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. |
1931 |
| details |
Middle Eocene |
|
Utah |
Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. |
1931 |
| details |
Middle Eocene |
|
Colorado |
Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. |
1931 |
| details |
Middle Eocene |
|
Colorado |
Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. |
1931 |
| details |
Middle Eocene |
|
Colorado |
Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. |
1931 |
| details |
Middle Eocene |
|
Colorado |
Bradley,W.H. Origin and microfossils of the oil shales of the Green River Formation of Colorado and Utah. |
1931 |
| details |
Carboniferous |
|
Czechoslovakia |
Nemejc,F. A study on the systematical position of the fructification called Sporangiostrobus Bode. |
1931 |
| details |
Late Rhaetian |
Early Liassic |
Greenland |
Harris,T.M. The fossil flora of Scoresby Sound, east Greenland. Part 1. Cryptogams (exlusive of Lycopodiales). |
1931 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Isabella Beds (Laziska Layers) in Trzebinia. |
1930 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Isabella Beds (Laziska Layers) in Trzebinia. |
1930 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Isabella Beds (Laziska Layers) in Trzebinia. |
1930 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Isabella Beds (Laziska Layers) in Trzebinia. |
1930 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Isabella Beds (Laziska Layers) in Trzebinia. |
1930 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Isabella Beds (Laziska Layers) in Trzebinia. |
1930 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Isabella Beds (Laziska Layers) in Trzebinia. |
1930 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. Megaspores from the Isabella Beds (Laziska Layers) in Trzebinia. |
1930 |