- Chasm
- Canyon
- Ravine
- Gorge
A deep valley with steep sides would be called a gorge or canyon.
the river running through rock wear it down into deep valley with the steep sides what is it called
A ravine.
Canyon
A ravine is a narrow, deep valley with steep sides typically formed by water erosion. It is often characterized by its rugged terrain and lack of vegetation.
Deep valleys with cliffs or steep slopes along their sides are called gorges. Gorges are typically formed by the erosion of water flowing through the valley.
A deep steep-sided valley formed by weathering and erosion is called a canyon. Canyons are typically formed by the gradual wearing away of rock by water and wind over long periods of time, creating a deep, narrow valley with steep sides.
Such structure could be called a Canyon.
fjord
Canyon
That would be CANYON.
deep valley i think :)