| original |
Maastrichtian |
Danian |
Japan(Hokkaido I.) |
Takahashi,K. et al. Palynostratigraphic investigation of the Akkeshi and Tokotan Formation of the Nemuro Group |
1990 |
| details |
Maastrichtian |
Danian |
Japan(Hokkaido I.) |
Takahashi,K. Palynologic study of the Akkeshi and Tokotan Formations of the Nemuro Group, Eastern Hokkaido |
1991 |
| original |
Danian |
|
Japan(Hokkaido I.) |
Takahashi,K. Palynologic study of the Akkeshi and Tokotan Formations of the Nemuro Group, Eastern Hokkaido |
1991 |
| details |
Late Maastrichtian |
Early Danian |
Japan(Hokkaido I.) |
Takahashi,K. et al. Palynologic study of Kawaruppu K/T Boundary samples in eastern Hokkaido |
1992 |
| details |
Early Danian |
|
Japan(Hokkaido I.) |
Takahashi,K. et al. Palynologic study of Kawaruppu K/T Boundary samples in eastern Hokkaido |
1992 |