|Bridal Veil Falls,Yosemite National Park|
- A valley called as dale.
- A very deep river valley called a canyon/ gorge.
- U-shaped / V-shaped are formation of valleys.
- Through the valley which a river runs.
- A small, secluded wooded valley known as;
a glen (Scotland)
- A wide, flat valley is known as strath.
- A mountain cove is a small valley.
- Which results from erosion of a geologic window.
- A small valley surrounded by mountains/ ridges.
- It is sometimes known as a hollow.
|Death Valley in bloom.|
- A deep, narrow valley is known as a coon.Such as;
- The exact shape depend on stream flowing through it.
- Rivers with steep gradients produce steep walls.
- Shallower slopes produce broader & gentler valleys.
- Some broad V examples ;
Grand Canyon NP
- First human complex societies originated in river valleys.
e.g. Nile Tigris-Euphrates
Yangtze Huang He
- A vale is a wide river valley.
- usually with wide flood plain / flat valley bottom.
- Vales commonly occur between escarpment slopes of pairs of chalk downs.
- Carved by glaciers.
- It is normally U-shaped.
- Often littered with small boulders.
- That were transported ice.
- Floor gradient doesn't affect valley's shape.
- Continuously flowing glaciers(ice age) & large-sized glaciers carve wide, deep incised valleys.
- Yosemite Valley
- Side valleys
- St. Mary River,Glacier National Park,Montana, USA.
- A tunnel valley is
- Originally cut under the glacial ice.
- It is near the margin of continental ice sheets.
- Long: up to 100 km
- Wide: 4 km
- Deep: 400 m
- Formed by sub glacial erosion by water.
- Served as sub glacial drainage pathways.
- It carrying large volumes of melt water.
- Their cross-sections exhibit steep-sided flanks similar to fjord walls, and their flat bottoms are typical of subglacial glacial erosion.
- A hanging valley is a tributary valley.
- The floor at a higher relief .
- They have U-shaped valleys.
- Waterfalls form at or near the outlet of the upper valley.
- Hanging valleys are product of varying rates of erosion of the main valley.
- It is a small valley/dry stream bed.
- Formed by river valleys.
- e.g.Mansfield Hollow
- Aburra Valley (Colombia)
- Barossa Valley (Australia)
- Cauca Valley (Colombia)
- Central Valley (California) (California, United States)
- Danube Valley (Eastern Europe)
- Death Valley (California, United States)