| Age | Group | Formation | Lithology |
| Recent |
|
| Alluvial soil cover with terraces |
|
|
|
| Hard grey sandstone, siltstone, shale |
| Miocene | Tipam | Tipam sandstone |
|
|
|
|
| Coarse to gritty hard sandstones with salt and pepper appearance. |
|
| Unconformity | ||
|
|
|
| Sandstone, carbonaceous shale and coal seams with shale and sandy shale. |
| Oligocene | Barail | Tikak Parbat |
|
|
|
|
| Shale, carbonaceous shale, sandy shale, sandstone and thick coal seam. |
|
| Thrust contact (Naga Thrust) | ||