Question

Formation of northern plains

Answer 1

The Northern plains or the great plains in India were formed from the sedimentary deposits - alluvium, brought by the rivers from the Himalayas by its erosion.

The plains were formed in the Pleistocene and Holocene during the Quaternary era and are the most recent geological unit of India. The upheaval of Himalayas created a marine depression between the mountains and the Indian peninsula. This marine depression or trough was filled with detrital material. The deposition of alluvium from the Himalayas commenced after the final phase of the Siwaliks and has continued till now. These plains rest upon the older Tertiary sediments of the Himalayan Piedmont.

The plains were formed by layers of different sediments of different sizes in successive deposits.


THNX....

Answer 2

The Northern Plain was formed by the deposits brought in by the three major rivers and their tributaries. Alluvium was deposited at the foot–hills of the Himalayas for millions of years. These deposits are now the fertile Northern Plains. Alluvium is soil or sediments deposited by a river or other running water.