| details |
Oligocene |
|
Canada(Arctic) |
White,J.M. Palynostratigraphy of the Esso et al., Issungnak 0-61 Well, Beaufort Sea. |
1989 |
| details |
Late Neogene |
|
California |
Martin,P.S. et al. Pollen analysis and the Cenozoic. |
1962 |
| details |
Campanian |
Maastrichtian |
California |
McLeroy,C.A. Late Cretaceous angiosperm pollen from the western San Joaquin Valley, California. |
1969 |
| details |
Miocene |
Pliocene |
Alaska |
Leopold,E.B. et al. A long pollen sequence of Neogene age, Alaska range. (In: Tertiary Quaternary Boundaries. T.A. Ager et al, editors) |
1994 |
| details |
Middle Miocene |
Pleistocene |
Alaska |
White,J.M. et al. An 18 million year record of vegetation and climate change in northwestern Canada and Alaska: Tectonic and global climatic correlates. |
1997 |