Question

The steep-sided narrow and deep valley of a river formed in its upper course is known as

Answer 1

Answer:

A gorge is a narrow valley with steep, rocky walls located between hills or mountains. The term comes from the French word gorge, which means throat or neck. A gorge is often smaller than a canyon, although both words are used to describe deep, narrow valleys with a stream or river running along their bottom.

Answer 2

Answer:

1. latrral erosion of the river
2. ex, George