| details |
Early Cretaceous |
|
Maryland |
Brenner,G.J. The spores and pollen of the Potomac Group of Maryland |
1963 |
| details |
Late Cretaceous |
|
Colorado |
Clarke,R.T. Palynology of Vermejo Formation Coals, (Upper Cretaceous) in the Canon City Coal Field, Fremont County, Colorado |
1963 |
| details |
Late Jurassic |
Cretaceous |
Canada(W.Canada) |
Pocock,S.A.J. Microfloral analysis and age determination of strata at the Jurassic-Cretaceous boundary in the Western Canada Plains |
1962 |
| original |
Neocomian |
Albian |
Maryland |
Brenner,G.J. The spores and pollen of the Potomac Group of Maryland |
1962 |
| details |
Paleocene |
|
Montana |
Pocock,S.A.J. Microfloral analysis and age determination of strata at the Jurassic-Cretaceous boundary in the Western Canada Plains |
1962 |
| details |
Paleocene |
|
South Dakota |
Gerhard,J.E. Paleocene miospores from the Slim Buttes area, Harding County, South Dakota. |
1958 |
| details |
Tertiary |
|
Montana |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 1 |
1956 |
| details |
Tertiary |
|
Montana |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 1 |
1956 |