A valley is a type of landform. A valley is a lower part of the land, between two higher parts which might be hills or mountains. A valley is a low area between hills or mountains often with a river running through it. In geology, a valley or dale is a depression that is longer than it is wide. Valleys often start as a downward fold between two upward folds in the surface of the Earth, and sometimes as a rift valley. The terms U-shaped and V-shaped are descriptive terms of geography to characterize the form of valleys. A valley is a low-lying landmass a depression that is bounded by higher grounds, often mountains and hills. There are many types of valleys including rift valleys, river valleys and so on.
How is valley formed?
A valley formed by flowing water, or river valley, is usually V-shaped. The exact shape will depend on the characteristics of the stream flowing through it. U shaped valleys are formed by glacial erosion as massive mountain glaciers moved slowly down mountain slopes during the last glaciation. Rivers with steep gradients, as in mountain ranges, produce steep walls and a bottom. Shallower slopes may produce broader and gentler valleys. Most valleys on dry land are formed by running water of streams and rivers.The bottom of a valley is called its floor. V-shaped valleys are caused by forces such as erosion and rivers. Valleys are not at all formed by rivers. A hanging valley can be formed when the lower valley has a greater rate of erosion. This can be caused by 2 glacier flows, one feeding the other. This may also be caused by a greater flow of water in the lower valley or soft rock layers that erode more quickly.
Importance of valley:
A valley is a type of landform. A valley is a lower part of the land, between two higher parts which might be hills or mountains. Valleys often start as a downward fold between two upward folds in the surface of the Earth, and sometimes as a rift valley. V-shaped valleys are caused by forces such as erosion and rivers. Valleys are not at all formed by rivers. … Erosion by rivers is a main valley-forming process; other processes, such as movement of the earth’s crust and glaciers, also have an important part in some cases. River valleys and plains provide fertile soils. Farmers in dry regions irrigate their cropland using water carried by irrigation ditches from nearby rivers. Rivers are an important energy source.
Facts about valley:
- The steeper the mountain, the faster the water flows. The faster the water flows, the deeper the valley it makes. Some valleys are steep canyons.
- Glaciers, which are huge sheets of ice, make even larger valleys. They slowly move down a mountain, often following a valley already created by a river. They round out the valley so it has a U-shape instead of a V-shape.
- Occasionally, a valley isn’t caused by a river or a glacier. A valley forms where two plates meet but don’t completely touch.
- Valleys are usually protected from fierce winds and storms.