AskDefine | Define ridge

Dictionary Definition

ridge

Noun

1 a long narrow natural elevation or striation
2 any long raised strip
3 a long narrow range of hills
4 any long raised border or margin of a bone or tooth or membrane
5 a beam laid along the ridge of a roof; provides attachment for upper end of rafters [syn: ridgepole, rooftree]

Verb

1 extend in ridges; "The land ridges towards the South"
2 plough alternate strips by throwing the furrow onto an unploughed strip
3 throw soil toward (a crop row) from both sides; "He ridged his corn"
4 spade into alternate ridges and troughs; "ridge the soil"
5 form into a ridge

User Contributed Dictionary

English

Etymology

hrycg

Pronunciation

Noun

  1. The line along which two sloping surfaces meet which diverge towards the ground.
  2. A chain of hills or mountains.
  3. A long narrow elevation on an ocean bottom.
  4. (meteorology) A type of warm air that comes down on to land from mountains.

Translations

line of intersection
  • Finnish: harjanne
  • Russian: гребень
  • Swedish: ås , nock (of a roof)
chain of hills or mountains
  • Czech: hřeben
  • Finnish: kukkulajono (chain of hills), vuorijono (chain of mountains)
  • Norwegian: rygg , åsrygg
  • Russian: горный хребет, горная цепь
  • Swedish: ås (chain of hills); bergsrygg , rygg (chain of mountains)
elevation on ocean bottom
  • Finnish: keskiselänne
  • Norwegian: rygg
  • Russian: океанический хребет
  • Swedish: rygg
Translations to be checked

Verb

  1. to form into a ridge

Related terms

See also

Extensive Definition

A ridge is a geological feature that features a continuous elevational crest for some distance. Ridges are usually termed hills or mountains as well, depending on size. There are several main types of ridges:
  • Dendritic ridge: In a typical plateau terrain, the stream drainage valleys will leave intervening ridges. These are by far the most common ridges. These ridges usually represent slightly harder rock, but not always -- they are often simply because there were larger joint spaces where the valleys formed, or other chance occurrences. This type of ridge is generally somewhat random in orientation, often changing direction frequently, often with knobs at intervals on the ridge top.
  • Stratigraphic ridge: In places such as the Ridge-and-valley Appalachians, very long, very even, very straight ridges are formed due to the fact that they're the uneroded remaining edges of the more resistant strata that were folded laterally. Similar ridges have formed in places such as the Black Hills, where the ridges form concentric circles around the igneous core. Sometimes these ridges are called "hogback ridges".
  • Oceanic spreading ridge: In tectonic spreading zones around the world, such as at the Mid-Atlantic Ridge, the volcanic activity forming new plate boundary forms volcanic ridges at the spreading zone. Isostatic settling and erosion gradually reduce the elevations moving away from the zone.
  • Volcanic caldera ridges: Large volcanoes often leave collapsed central calderas that are bordered by circular ridges.
  • Thrust fault ridges: Thrust faults often form escarpments. Sometimes the tops of the escarpments form not plateaus, but slope back so that the edges of the escarpments form ridges.
  • Dune ridges: In areas of large-scale dune activity, certain types of dunes result in sand ridges.
  • Moraines and eskers: Glacial activity may leave ridges in the form of moraines and eskers. An arête is a thin ridge of rock that is formed by glaciers.

See also

External links

  • InterRidge An initiative for international cooperation in ridge-crest studies
ridge in Czech: Hřbet (geomorfologie)
ridge in German: Gebirgskamm
ridge in French: Crête
ridge in Dutch: Bergkam
ridge in Japanese: 尾根
ridge in Polish: Grzbiet górski
ridge in Portuguese: Tergo
ridge in Serbian: Гребен
ridge in Finnish: Selänne
ridge in Contenese: 山脊
ridge in Chinese: 山脊

Synonyms, Antonyms and Related Words

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