| details |
Late Pliocene |
Early Pleistocene |
Idaho |
Thompson,R.S. Pliocene and Early Pleistocene environments and climates of the Western Snake River Plain, Idaho |
1996 |
| details |
Oligocene |
Miocene |
Colorado |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Middle Miocene |
Pleistocene |
Canada(Yukon) |
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 |
| details |
Holocene |
|
Canada(Ontario) |
Burden,E.T. et al. Palynology of Indian and European forest clearance and farming in lake sediment cores from Awenda Provincial Park, Ontario. |
1986 |
| details |
Quaternary |
|
Canada(Manitoba) |
Nambudiri,E.M.V. et al. Pre-Quaternary microfossils: A guide to errors in radiocarbon dating. |
1980 |
| details |
Late Neogene |
|
Canada(Arctic) |
Fyles,J.G. Beaufort Formation (Late Tertiary) as Seem from Prince Patrick Island, Arctic Canada. |
1990 |
| details |
Early Miocene |
Middle Miocene |
California |
Barnett,J. Palynology and paleoecology of the Tertiary Weaverville Formation, Northwestern California, USA. |
1989 |
| details |
Late Pliocene |
|
Brazil(Rio de Janeiro) |
Modenesi,M.C. et al. Previous note; Preliminary palynological results Turfosos sediments of the Varzea Do Ribeirao flora of Rio de Janeiro. |
1988 |
| details |
Clarendonian |
|
Arizona |
Gray,J. Tertiary pollen flora from the basin and range Provence, Arizona. |
1960 |
| 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 |