A deep valley with steep sides would be called a gorge or canyon.
A deep narrow valley with steep edges would be described as a gorge.
marina trench
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
fjord
That would be CANYON.
Canyon
a deep, steep-sided, narrow river valley
Deep valley or creek with steep, narrow edges. Often a dangerous one that relates to death or the brink of death.
Such a valley would be called a gorge.
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.