original |
Late Cretaceous |
|
Colorado |
Clarke,R.T. Palynology of Vermejo Formation Coals, (Upper Cretaceous) in the Canon City Coal Field, Fremont County, Colorado |
1963 |
original |
Late Cretaceous |
|
Kentucky |
Tschudy,R.H. Palynology of the Cretaceous-Tertiary boundary in the northern Rocky Mountain and Mississippi Embayment Regions. (In: Symposium on Palynology of the Late Cretaceous and Early Tertiary. R.M Kosanke and A.T. Cross, editors) |
1970 |
original |
Early Callovian |
|
|
Volkheimer,W. Palynological study of a Callovian Coal from Neuqu©n and considerations of the Jurassic paleoclimates of Argentina |
1972 |
original |
Late Ypresian |
|
France |
Auffret,J.P. et al. Palynological data of the Submarine Paleogene Basin of the eastern English Channel |
1975 |