RIDGE

n. mountain range, chain of mountains; crest, thin uppermost edge; long raised strip or rib

v. mark with ridges; form ridges

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.Crater ridges: Large meteorite strikes typically form large impact craters bordered by circular ridges.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.
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Noun
1. a long narrow natural elevation or striation
(hypernym) natural elevation, elevation
(hyponym) bank
2. any long raised strip
(hypernym) convex shape, convexity
(hyponym) raphe, rhaphe
3. a long narrow range of hills
(hypernym) geological formation, formation
(hyponym) arete
4. any long raised border or margin of a bone or tooth or membrane
(hypernym) process, outgrowth, appendage
(hyponym) supraorbital ridge, supraorbital torus, superciliary ridge, superciliary arch
5. a beam laid along the ridge of a roof; provides attachment for upper end of rafters
(synonym) ridgepole, rooftree
(hypernym) beam
(part-holonym) gable roof, saddle roof, saddleback, saddleback roof
Verb
1. extend in ridges; "The land ridges towards the South"
(hypernym) cover, extend
2. plough alternate strips by throwing the furrow onto an unploughed strip
(hypernym) plow, plough, turn
(classification) farming, agriculture, husbandry
3. throw soil toward (a crop row) from both sides; "He ridged his corn"
(hypernym) throw
4. spade into alternate ridges and troughs; "ridge the soil"
(hypernym) spade
5. form into a ridge
(hypernym) shape, form

(v. t.)
To wrinkle.
  

(v. t.)
To form into ridges with the plow, as land.
  

(v. t.)
To form a ridge of; to furnish with a ridge or ridges; to make into a ridge or ridges.
  

(n.)
The intersection of two surface forming a salient angle, especially the angle at the top between the opposite slopes or sides of a roof or a vault.
  

(n.)
The highest portion of the glacis proceeding from the salient angle of the covered way.
  

(n.)
The back, or top of the back; a crest.
  

(n.)
A range of hills or mountains, or the upper part of such a range; any extended elevation between valleys.
  

(n.)
A raised line or strip, as of ground thrown up by a plow or left between furrows or ditches, or as on the surface of metal, cloth, or bone, etc.
  

An elongated area of relatively high atmospheric pressure; the opposite of trough .