Tuesday, 6 January 2015

RIVERS AND VALLEYS IS USEFUL FOR PEOPLE

Valley
From Wikipedia, the free encyclopedia
This article is about the physical-geographic term. For places name "Valley", see Valley (disambiguation).
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Calchaquí Valleys in Argentina
U-shaped valley in Glacier National Park, Montana, USA
Romsdalen in Western Norway is an upright Almost valley.
Fljótsdalur in East Iceland, a rather flat valley (in Scotland, this type of valley is called a "strath")

A valley is a low area Between hills, with a river running-through Often it.
The Valley of Marvels in Babille, Ethiopia.

In geology, a valley or dale is a depression That is longer than it is wide. The terms U-shaped and V-shaped are descriptive terms of geography to Characterize the form of valleys. Most valleys belong to one of These two main types or a mixture of them, (at least) With RESPECT of the cross section of the slopes or hillsides.

contents

      1 Valley terminology
      2 River valleys
      3 It
      4 Glacial valleys
          4.1 U-shaped valley
          4.2 Tunnel valley
          Meltwater 4.3 valley
      5 Transition valley forms and shoulders
      6 Hanging valleys
      Valley floors 7
      8 Hollows
      9 Famous valleys
      10 Rift valleys
      11 See also
      12 References
      13 External links
          Extraterrestrial 13.1 valleys

Valley terminology

A valley in Its broadest geographic sense is Also known as a dale. A valley-through Which river runs to May Also be Referred to as a voucher. A small, secluded, wooded valley and is Often Known as a dell or as a glen in Scotland. A wide, flat valley runs a river-through in Scotland Which is Known as a strath. A cove is a small mountain valley, closed at one or both ends, in the southern Appalachian Mountains Central or: sometimes Which results from the erosion of a geologic window. A small valley Surrounded by mountains or ridges is: sometimes Known as a hollow. A deep, narrow valley is Known as a cwm (also spelled combe or coombe). Similar geological structures, Such as canyons, ravines, gorges, gullies, and kloofs, we are not usually we Referred to as valleys. See also: "chine".
River valleys

      For a comprehensive list of world wide river valleys see: River valleys (category)

Further information: River phenomenon

A valley FORMED by flowing water, or river valley, is V-shaped usually we we. The exact shape will depend on the Characteristics of the stream flowing-through it. With Rivers steep gradients, as in mountain ranges, produces steep walls and a bottom. May produce shallower slopes Broader and gentler valleys. However, in The Lowest stretch of a river, Where It Approaches based STI level, it Begins to deposit sediment and the valley bottom Becomes a floodplain.

Some examples are broad V:

      North America: Black Canyon of the Gunnison National Park, and others in Grand Canyon NP
      Europe:
          Austria: narrow passages of upper Inn valley (Inntal), affluents of Enns
          Switzerland: Napf region, Zurich Oberland, Engadin
          Germany: affluents to the middle Reaches of Rhine and Mosel

Some of the first human complex societies originated in river valleys,:: such as That of the Nile, Tigris-Euphrates, Indus, Ganges, Yangtze, Huang He, Mississippi, and arguably Amazon. In prehistory, the rivers Were used as a source of freshwater and food (fish and game), as well as a place to wash and a sewer. The proximity of water moderated temperature extremes and provided a source for irrigation, stimulating the development of agriculture. Most of the first civilizations developed from river valley in Original Communities. Another word for river valley phenomenon is River.
voucher
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