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 canyon is a deep, narrow valley with steep sides. The movement of rivers, the processes of weathering and erosion, and tectonic activity create canyons.
a canyon
A canyon
canyon
cliff
Valley
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.
Such a valley would be called a gorge.
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.
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
A deep valley with steep sides would be called a gorge or canyon.
Valley
Canyon
the river running through rock wear it down into deep valley with the steep sides what is it called
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.
Such structure could be called a Canyon.
This is called a graben. It may ultimately form a rift valley.
A Canyon
That could be a ravine or a gully
Such a valley would be called a gorge.
A canyon or chasm
Try "canyon".