A canyon with very steep walls is often referred to as a "gorge." Gorges typically feature narrow, deep valleys carved by the erosive action of rivers or glaciers, resulting in dramatic cliffs on either side. These formations can be strikingly beautiful and are commonly found in various landscapes around the world.
Such structure could be called a Canyon.
A plateau is a flat elevated landform with steep sides, while a canyon is a deep valley with steep sides usually carved by a river. Plateaus are generally broad and flat on the top, while canyons have narrow bottoms and high vertical walls.
A canyon or chasm
The submarne canyon is very steep-sidded.
A 'hanging valley' is a valley which is cut across by a river flowing in a deeper valley.
The landform you're describing is called a canyon. Canyons are formed by the erosion of rivers over thousands or millions of years, creating steep sides and unique geological formations.
A long, narrow valley between high cliffs is a canyon. Canyons within mountains, or gorges that have an opening on only one side are called box canyons. Slot canyons are very narrow canyons, often with smooth walls.
I have heard it called the rim.
Basins and canyons are both valleys. A basin is a wide valley shaped like a bowl and a canyon is a very narrow valley with steep sides.
the low area between hills or mountain is called...VALLEY
No, the Grand Canyon is not a v-shaped valley. It is a steep-sided canyon carved by the Colorado River over millions of years. The canyon's depth and scale are much greater than a typical v-shaped valley formed by a stream or river.
That was a very steep hill!