| original |
Late Cretaceous |
|
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 |
Late Cretaceous |
|
Wyoming |
Stone,J.F. Palynology of the Almond Formation, (Upper Cretaceous), Rock Springs Uplift, Wyoming. |
1973 |
| details |
Late Cretaceous |
|
Wyoming |
Meyers,W.C. Environmental analysis of Almond Formation (Upper Cretaceous), from Rock Springs Uplift, Wyoming. |
1977 |
| details |
Maastrichtian |
|
Montana |
Dingus,L.W. A stratigraphic review and analysis for selected marine and terrestrial sections spanning the Cretaceous-Tertiary boundary. (Unpublished Ph.D Thesis, University of California, Berkeley) |
1983 |
| details |
Maastrichtian |
|
North America |
Lupia,R. Discordant morphological disparity and taxonomic diversity during the Cretaceous angiosperm radiation: North American pollen record. |
1999 |