| details |
Tertiary |
Recent |
Texas |
Leffingwell,H.A. A study of the variation of the microfossil assemblages within the Vicksburg Formation, Texas. |
1958 |
| details |
Tertiary |
Recent |
Texas |
Leffingwell,H.A. A study of the variation of the microfossil assemblages within the Vicksburg Formation, Texas. |
1958 |
| details |
Early Oligocene |
Middle Oligocene |
India(Assam) |
Singh,R.K. Development of Palaeogene palynostratigraphy in northeast India. (In: Cenozoic stratigraphy and palynology in India.) |
1982 |
| details |
Early Oligocene |
Middle Oligocene |
India(West Bengal) |
Singh,R.K. Development of Palaeogene palynostratigraphy in northeast India. (In: Cenozoic stratigraphy and palynology in India.) |
1982 |