The Brahmaputra Valley: The eastern part of the Northern plain in Assam made by the deposition of silts of Brahmaputra river is called Brahmaputra valley.
Salient features:
- This is an elongated narrow plain which is bounded by the hills in the north, east and south.
- The plain slopes from the east (130 m) to the west (30 m),
- The river Brahmaputra here flows in a braided course.
- There are many sand banks and river islands in the river Brahmaputra. Majuli islands are the largest river island of the world.
- The northern part of this plain lying at the foothills of the Himalayas composed of sands, stones and pebbles and is called Terai.