| NORTH |
|
|
| Gondwana |
carbonaceous shale, sandstone and coal with plant fossils. |
| MBF |
| Lower Siwalik |
Well indurated sandstone, shale and silt-stone, abundant plant fossils. |
| Fault |
| Middle Siwalik |
Weakly indurate sandstone with concretions, shale, siltstone and conglomerate; abundant plant fossils. |
| Fault |
| Upper Siwalik |
Sand rock, claystone/shale and boulder beds/gravel beds. abundant plant fossils especially petrified and carbonized wood |
| Main Frontal Fault |
| SOUTH |
Assam alluvia/ quaternary deposits |
|
