| details |
Paleocene |
|
Montana |
Norton,N.J. Palynology of the Upper Cretaceous and Lower Tertiary in the type locality of the Hell Creek Formation |
1965 |
| original |
Early Tertiary |
|
Montana |
Norton,N.J. et al. Guide sporomorphae in the Upper Cretaceous-Lower Tertiary of eastern Montana (U.S.A). |
1967 |
| details |
Early Paleocene |
|
Montana |
Norton,N.J. et al. Palynology of the Upper Cretaceous and Lower Tertiary in the type locality of the Hell Creek Formation, Montana, USA. |
1969 |
| details |
Paleocene |
Danian |
USA |
Takahashi,K. Distribution and change of the Upper Cretaceous and Lower Paleogene microflora in Circum-Pacific Regions and Siberia. |
1970 |
| details |
Paleocene |
|
Montana |
Srivastava,S.K. Cretaceous spore-pollen floras |
1978 |
| details |
Late Maastrichtian |
|
Canada(Alberta) |
Jerzykiewicz,T. et al. The Cretaceous-Tertiary boundary in the Central Alberta Foothills. I. Stratigraphy. |
1986 |