| original |
Cenomanian |
Coniacian |
Wyoming |
Upshaw,C.F. Palynology of the Frontier Formation, northwestern Wind River Basin, Wyoming. |
1959 |
| details |
Nd |
|
Nd |
Griggs,P.H. Stratigraphy and palynology of the Frontier Formation, Big Horn Basin, Wyoming |
1970 |
| details |
Oligocene |
|
India(Assam) |
Singh,R.Y. et al. Palynology of the Barail Sediments in the States of Assam and Meghalaya, India. |
1985 |
| details |
Late Oligocene |
|
India(Assam) |
Singh,R.Y. et al. Palynostratigraphy of the Oligocene sediments of Namdang River, Assam. |
1986 |