- Dihang gorge
- sudden southward bend by himalayas
- forming Purvanchal.
- eastern hills
- Fold mountains
- development
- when Indian plate ⏭️EU plate on eastern margins
NOTE
Hills are arranged in decreasing order of their elevation 🏔️⛰️🗻
- Patkai
- Naga
- Mizo
- Lamatol
- East Manipur