| details |
Middle Oligocene |
Late Oligocene |
India(Assam) |
Singh,R.K. Development of Palaeogene palynostratigraphy in northeast India. (In: Cenozoic stratigraphy and palynology in India.) |
1982 |
| details |
Middle Oligocene |
Late Oligocene |
India(West Bengal) |
Singh,R.K. Development of Palaeogene palynostratigraphy in northeast India. (In: Cenozoic stratigraphy and palynology in India.) |
1982 |
| original |
Oligocene |
|
India(Assam) |
Singh,R.Y. et al. Palynology of the Barail Sediments in the States of Assam and Meghalaya, India. |
1985 |