That would be CANYON.
A deep valley with steep sides would be called a gorge or canyon.
fjord
That could be a ravine or a gully
This is called a graben. It may ultimately form a rift valley.
A narrow valley is a V-shaped valley, or river valley. A narrow valley has steep sloped sides that look like the letter V. They are formed by a strong stream.
A V shaped valley, over time the river erodes downwards causing a channel, then the rocks at the sides collapse in because they have nothing supporting them causing a valley with steep sides
Canyon
A deep valley with steep sides would be called a gorge or canyon.
A rift valley has steep narrow sides and a flat floor. A rift valley forms where the Earth's crust is spreading or splitting apart.
It is a Canyon as in the Grand Canyon.
the river running through rock wear it down into deep valley with the steep sides what is it called
A steep valley is called a canyon or ravine. Valleys can have different shapes because of the shape of the land and what is eroding it. The canyons usually have steep sides. Other words that can refer to a steep valley include gully, hollow and gorge.
Valley
fjord
A Canyon
- Chasm - Canyon - Ravine - Gorge
That could be a ravine or a gully