| details |
Late Miocene |
|
Atlantic Ocean |
Engel,E.R. Palynological evidence of climatically relevant events from Miocene sediments from the North Atlantic. |
1992 |
| details |
Oligocene |
|
Antarctica |
Wilson,G.J. Marine palynology. (In: Antarctic Cenozoic history from the Ciros-1 Drillhole, McMurdo Sound. P.J.Barrett, editor) |
1989 |
| details |
Early Oligocene |
|
Alaska |
Marincovich,L.,Jr. et al. Oligocene age of strata on Unga Island, Shumagin Islands, Southwestern Alaska. (In: Geologic Studies in Alaska by the United States Geological Survey. J.H. and J.P.Galloway, editors) |
1991 |