| details |
Nd |
|
Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 3 |
1960 |
| details |
Cenomanian |
|
Alabama |
Leopold,E.B. et al. Studies of Pre-Selma Cretaceous core samples from the outcrop area in Western Alabama. E: A preliminary report on the pollen and spores of The Pre-Selma Upper Cretaceous strata of Western Alabama. |
1964 |
| details |
Nd |
|
Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 4. Supplement to all Groups, (Turmae). |
1966 |
| details |
Late Paleocene |
Early Eocene |
North Dakota |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Paleocene |
|
North Dakota |
Hickey,L.J. Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of Western North Dakota. |
1977 |