| details |
Santonian |
Middle Campanian |
Canada(Alberta) |
Norris,G. et al. Evolution of the Cretaceous terrestrial palynoflora in Western Canada. |
1975 |
| details |
Middle Albian |
Early Campanian |
Utah |
Nichols,D.J. et al. Guide species of dinocysts, pollen, and spores from Cretaceous formations in the overthrust Belt of Utah and Wyoming. |
1980 |
| details |
Middle Albian |
Early Campanian |
Wyoming |
Nichols,D.J. et al. Guide species of dinocysts, pollen, and spores from Cretaceous formations in the overthrust Belt of Utah and Wyoming. |
1980 |
| details |
Maastrichtian |
|
Wyoming |
Nichols,D.J. et al. A new Cretaceous-Tertiary boundary locality in the Western Powder River Basin, Wyoming; Biological and geological implications. |
1992 |
| details |
Early Campanian |
Maastrichtian |
Wyoming |
Nichols,D.J. et al. Palynostratigraphic framework for the Cretaceous (Albian-Maestrichtian), of the overthrust Belt of Utah and Wyoming. |
1982 |
| details |
Early Campanian |
Maastrichtian |
Utah |
Nichols,D.J. et al. Palynostratigraphic framework for the Cretaceous (Albian-Maestrichtian), of the overthrust Belt of Utah and Wyoming. |
1982 |
| details |
Late Campanian |
Maastrichtian |
USA(Rocky Mountains) |
Nichols,D.J. et al. Cretaceous palynomorph biozones for the Central and northern Rocky Mountain Region of the United States. |
1982 |
| details |
Maastrichtian |
|
Wyoming |
Nichols,D.J. et al. Cretaceous biostratigraphy in the Wyoming Thrust Belt |
1982 |
| details |
Maastrichtian |
|
Utah |
Nichols,D.J. et al. Cretaceous biostratigraphy in the Wyoming Thrust Belt |
1982 |
| details |
Late Maastrichtian |
|
Canada(Saskatchewan) |
Nichols,D.J. et al. Palynological and Iridium anomalies at Cretaceous-Tertiary boundary, south-central Saskatchewan. |
1986 |
| details |
Late Maastrichtian |
|
Montana |
Nichols,D.J. et al. Latest Cretaceous and Early Tertiary history of vegetation in the Powder River Basin, Montana and Wyoming. (In: Geological Society of America-Centennial Meeting Field Trip Guidebook. G.S. Holden, editor) |
1988 |
| details |
Late Maastrichtian |
|
Wyoming |
Nichols,D.J. et al. Latest Cretaceous and Early Tertiary history of vegetation in the Powder River Basin, Montana and Wyoming. (In: Geological Society of America-Centennial Meeting Field Trip Guidebook. G.S. Holden, editor) |
1988 |
| details |
Maastrichtian |
|
Wyoming |
Nichols,D.J. et al. Plant microfossil record of the terminal Cretaceous event in the Western United States and Canada. (In: Global catastrophes in earth history; An interdiciplinary conference on impacts, volcanism and mass mortality. V.L.Sharton et al, editors) |
1990 |
| details |
Maastrichtian |
|
North Dakota |
Nichols,D.J. et al. Plant microfossil record of the terminal Cretaceous event in the Western United States and Canada. (In: Global catastrophes in earth history; An interdiciplinary conference on impacts, volcanism and mass mortality. V.L.Sharton et al, editors) |
1990 |
| details |
Maastrichtian |
|
Wyoming |
Nichols,D.J. et al. Latest Cretaceous and Early Tertiary history of vegetation in the Powder River Basin, Montana and Wyoming. |
1989 |
| details |
Late Maastrichtian |
|
North America |
Nichols,D.J. et al. Palynological evidence of effects of the terminal Cretaceous event on terrestrial floras in Western North America. (In: Extinction events in earth history. IGCP, Proceeding of Project 216. E.G.Kauffman and O.H.Walliser, editors) |
1990 |
| details |
Late Campanian |
Early Maastrichtian |
Utah |
Nichols,D.J. et al. Palynology, age, and correlation of the Wanship Formation and their implications for the tectonic history of Northeastern Uth. |
1978 |