| details |
Eocene |
|
Japan(Hokkaido I.) |
Okazaki,Y. Palynological and stratigraphical studies on the Paleogene Coals in the Kushiro Coal Field, eastern Hokkaido.Geology of the Bepo Formation and its pollen analysis. Part 1. |
1957 |
| details |
Late Neogene |
|
Japan(Hokkaido I.) |
Okazaki,Y. Stratigraphical and palynological studies of the Honbetsu Group and the Ikeda Formation (Pliocene, Tertiary) in eastern Hokkaio. |
1958 |
| details |
Ypresian |
Priabonian |
California |
Frederiksen,N.O. Eocene sporomorph biostratigraphy of Southern California |
1989 |