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A valley is an elongated low area often running between hills or mountains and typically containing a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in ...
Tunnel valley – Glacial-formed geographic feature; Turlough – Type of seasonal or periodic lake found in limestone areas of Ireland; Tuya – Flat-topped, steep-sided volcano formed when lava erupts through a thick glacier or ice sheet; U-shaped valley – Valleys formed by glacial scouring; Uvala – Toponym for a closed karst depression
The crust in the Death Valley region between Lake Mead and the southern Sierra Nevada has been extended by as much as 150 miles (240 km). [18] The deep Death Valley basin is filled with sediment (light yellow) eroded from the surrounding mountains. Black lines show some of the major faults that formed the valley. (USGS image)
View of Monument Valley in Utah, looking south on U.S. Route 163 from 13 miles (21 km) north of the Utah–Arizona state line Mitchell Mesa from the View Hotel.. Monument Valley (Navajo: Tsé Biiʼ Ndzisgaii, pronounced [tsʰépìːʔ ǹtsɪ̀skɑ̀ìː], meaning "valley of the rocks") is a region of the Colorado Plateau characterized by a cluster of sandstone buttes, with the largest reaching ...
The entire valley is now flooded under an average 300 ft (91 m) of water behind the dam, although it occasionally reemerges in droughts, as it did in 1955, 1977, and 1991. [6] [7] Upstream from the valley lies the Grand Canyon of the Tuolumne, while the smaller Poopenaut Valley is directly downstream from O'Shaughnessy Dam. The Hetch Hetchy ...
Klingen are small, narrow, steep V-shaped valleys formed by the erosive forces of water and suspended abrasive particles, gravel and pebbles.They are usually side valleys without a discernible valley floor that lead into a main valley.
Coulee – Type of valley or drainage zone; Couloir – Steep, narrow mountain gully – a narrow gully with a steep gradient in a mountainous terrain; Dale (landform) – Open valley; Draw (terrain) – Terrain feature formed by two parallel ridges or spurs with low ground in between; Gulch – Deep V-shaped valley formed by erosion
A view upward into a coulee in the Oldman River valley in Lethbridge, Alberta. Aside from those formed by volcanic eruptions, coulees are commonly canyons characterized by steep walls that have been shaped by erosion. These types of coulees are generally found in the northwestern United States and southwestern Canada.