| details |
Oligocene |
|
India(Assam) |
Chakraborty,A. et al. Biostratigraphy of Garo Hills, Assam. |
1970 |
| details |
Late Eocene |
|
India(Assam) |
Bhandari,L.L. et al. Stratigraphy of Assam Valley, India. |
1973 |
| details |
Bartonian |
Priabonian |
India(Assam) |
Rangarao,A. Geology and hydrocarbon potential of a part of Assam-Arakan Basin and its adjacent region. (In: Petroliferous Basins of India. V. Pandhi et al, editors) |
1983 |
| details |
Miocene |
Pliocene |
Bangladesh |
Mannan,A Stratigraphic evolution and geochemistry of the Neogene Surma Group, Surma Basin, Sylhet, Bangladesh. |
2002 |