| details |
Santonian |
|
Canada(Alberta) |
Rouse,G.E. The Disclosure and paleobotanical evaluation of plant microfossils from selected Cretaceous Coal-bearing strata of Canada |
1956 |
| details |
Late Cretaceous |
|
Canada |
Radforth,N.W. et al. Floral transgression of major geological time zones. |
1956 |
| details |
Late Cretaceous |
|
Colorado |
Ames,H.T. Plant microfossils in a Colorado Cretaceous Coal |
1951 |
| details |
Eocene |
Miocene |
Texas |
Wilson,L.R. et al. Fossil spores and pollen of the Bender No.1 and B.D.Griffin No.5 wells, Montgomery County, Texas. |
1949 |
| original |
Paleocene |
|
Montana |
Wilson,L.R. et al. Plant microfossils from a Fort Union Coal of Montana. |
1946 |