Such a valley would be called a gorge.
Valley
The answer is COOKIEJOKING IT IS YOUR QUESTION NOT MINE SO HERE IS THE ANSWERCANYONCANYONcanyon
Justin bieber
gorge,canyon
CAVERN or canyon- It is also called, in text book, a V-Shaped valley, or sometimes even a gorge, but these are formed by water falls. Ask me how waterfalls form gorges if you wish.
A deep valley with steep sides would be called a gorge or canyon.
Canyon
a deep, steep-sided, narrow river valley
Valley
the river running through rock wear it down into deep valley with the steep sides what is it called
marina trench
Try "canyon".
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 long deep gulley, a narrow valley or gorge
A deep narrow steep-sided valley formed by a river in the place where there is little rainfall .
Such structure could be called a Canyon.
- Chasm - Canyon - Ravine - Gorge