¶¯ìõ¯ÝܾԿ|ûæõþõë/ö¯]½ñôÛH3]Žz”ÃuÚ¢!äzšãݝa|kˆ4a«ªÕÓ#˜€Y#c_-~„ï×µÙ*¢½v!Q†YõªÈ…ÿ A hollow is a small valley or dry stream bed. Rift valleys, such as the Albertine Rift and Gregory Rift are formed by the expansion of the Earth's crust due to tectonic activity beneath the Earth's surface. DescriptionU-shaped valley at the head of Leh valley, Ladakh.JPG English:Glacial valley at the head of Leh valley, Ladakh, NW India. This trough valley becomes visible upon the recession of the glacier that forms it. Examples of U-shaped valleys are found in every mountainous region that has experienced glaciation, usually during the Pleistocene ice ages. In northern Central Europe, the Scandinavian ice sheet during the various ice ages advanced slightly uphill against the lie of the land. From Wikipedia, the free encyclopedia A glaciated valley in the Altai Mountains showing the characteristic U shape. Valley is immediately south of the pass of Khardung La. A U-shaped valley is one formed by the process of glaciation. Antonyms for U-shaped valley. 11 synonyms for valley: hollow, dale, glen, vale, depression, dell, dingle, strath, cwm, coomb, vale. Rivers with steep gradients, as in mountain ranges, produce steep walls and a bottom. ... Wikipedia Encyclopedia. This term is commonly used in Ireland, New England, Appalachia, and the Ozarks of Arkansas and Missouri to describe such geographic features. For places named "Valley", see, Low area between hills, often with a river running through it, For a comprehensive list of river valleys, see. [5], Hanging valleys also occur in fjord systems under water. Translate texts with the world's best machine translation technology, developed by the creators of Linguee. Some of the deepest valleys in the world were made by glaciers. It typically ranges from about one to ten kilometers in width and is commonly filled with mountain sediments. Other interesting glacially carved valleys include: A tunnel valley is a large, long, U-shaped valley originally cut under the glacial ice near the margin of continental ice sheets such as that now covering Antarctica and formerly covering portions of all continents during past glacial ages.[4]. In Southern England, vales commonly occur between the escarpment slopes of pairs of chalk formations, where the chalk dome has been eroded, exposing less resistant underlying rock, usually claystone. They have a characteristic U-shape, with steep, straight sides, and a flat bottom. [6], Glaciated terrain is not the only site of hanging streams and valleys. The glaciers carved it out wider and deeper, simultaneously changing the shape. A hanging valley is a tributary valley that is higher than the main valley. As a result, its meltwaters flowed parallel to the ice margin to reach the North Sea basin, forming huge, flat valleys known as Urstromtäler. Translator. This article is about the physical-geographic term. During periods when Earth’s climate cools, glaciers form and begin to flow downslope. A valley carved by glaciers is normally U-shaped and resembles a trough. The most famous valley is the Lairig Ghru pass, a gouge through the centre of the mountains—a u-shaped valley, now partly filled with extensive scree produced by intense frost action during ice-free periods. Often, they take the easiest path, occupying the low V-shaped valleys … These rocks, along with the force of the ice, wear away the land like sandpaper. Many parts of the Cairngorms exhibit classic periglacial weathering which occurred during cold periods in ice-free areas. Because a glacier has a much greater viscosity and cross section than a river, its course has fewer and broader bends, and thus, the valley becomes straighter and smoother. The shape of the floor can be rather horizontal, similar to a flat cylinder, or terraced. The mouth of Ikjefjord is only 50 meters deep while the main fjord is around 1300 meters at the same point. As they flow slowly off snowcapped mountains, broken rocks get trapped in their bottom layers. Compare: V shaped valley. The proximity of water moderated temperature extremes and provided a source for irrigation, stimulating the development of agriculture. Side valleys are formed by tributaries to streams and rivers and feed the main stem. What are synonyms for U-shaped valley? ... About @ Founder Facebook Twitter Google+ Youtube Wikipedia Write to us. Learn how and when to remove this template message, Black Canyon of the Gunnison National Park, List of largest rifts, canyons and valleys in the Solar System, "Illustrated Glossary of Alpine Glacial Landforms - Hanging Valley", List of rivers that have reversed direction, https://en.wikipedia.org/w/index.php?title=Valley&oldid=991756813, Articles needing additional references from May 2013, All articles needing additional references, Wikipedia articles needing clarification from November 2017, Беларуская (тарашкевіца)‎, Srpskohrvatski / српскохрватски, Creative Commons Attribution-ShareAlike License. Erosion of Sognefjord, Norway. Usually this fact is the result of a violent erosion of the former valley shoulders, a special genesis found also at arêtes and glacial cirques, at every Scottish glen, or in a northern fjord. Most of the first civilizations developed from these river valley communities. at the sunny side) because the climate is very mild: even in winter when the valley's floor is completely filled with fog, these villages are in sunshine. Some Scottish glens full with bushes and flowers. The formation of U-shaped valleys, with a little bit of kitchen geography!
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