WordNet
- throw soil toward (a crop row) from both sides; "He ridged his corn"
- any long raised strip
- form into a ridge
- a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters (同)ridgepole, rooftree
- a long narrow range of hills (同)ridgeline
- a long narrow natural elevation on the floor of the ocean
- a long narrow natural elevation or striation
- any long raised border or margin of a bone or tooth or membrane
- extend in ridges; "The land ridges towards the South"
- plough alternate strips by throwing the furrow onto an unploughed strip
- spade into alternate ridges and troughs; "ridge the soil"
- an area in hostile territory that has been captured and is held awaiting further troops and supplies; "an attempt to secure a bridgehead behind enemy lines"; "the only foothold left for British troops in Europe was Gibraltar" (同)foothold
- a defensive post at the end of a bridge nearest to the enemy
- a card player in a game of bridge; "we need a 4th hand for bridge" (同)hand
- a suspension bridge across the Orinoco River at Ciudad Bolivar
- a cartridge that contains ink and can be replaced
- relieve from; "Rid the house of pests" (同)free, disembarrass
- having a ridge or shaped like a ridge or suggesting the keel of a ship; "a carinate sepal" (同)carinate, carinated, keeled
PrepTutorEJDIC
- 『山の背』,尾根 / (動物の)背,背すじ;(畑などの)うね,あぜ / (一般に,うねのような)隆起 / 〈屋根〉‘に'むねをつける;〈畑など〉‘に'うねをたてる
- 橋頭堡(きょうとうほ)(味方の渡河を援護する陣地)
- 《『rid』+『名』〈場所・人〉+『of』+『名』》(やっかいなものを)〈場所・人〉‘から'『取り除く』
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2014/05/14 12:45:02」(JST)
[Wiki en表示]
This article is about the use of the term in geography and physical geology. For other uses, see Ridge (disambiguation).
A mountain ridge in Japan
A stratigraphic ridge within the Appalachian Mountains.
The edges of tuyas can form ridges.
A ridge is a geological feature consisting of a chain of mountains or hills that form a continuous elevated 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 typical dissected plateau terrain, the stream drainage valleys will leave intervening ridges. These are by far the most common ridges. These ridges usually represent slightly more erosion resistant rock, but not always – they often remain because there were more joints 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, long, even, straight ridges are formed because they are 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 crater/caldera ridges:- Large volcanoes often leave behind a central crater/caldera bordered by circular ridges.
- Fault ridges:- 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 glacial erosion.
- Volcanic subglacial ridges:- Many subglacial volcanoes create ridge-like formations when lava erupts through a thick glacier or ice sheet.
- Shutter ridges:- A shutter ridge is a ridge which has moved along a fault line, blocking or diverting drainage. Typically, a shutter ridge creates a valley corresponding to the alignment of the fault that produces it.
See also
- Tectonic uplift
- Mountain range
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English Journal
- Alveolar ridge preservation with autologous particulated dentin-a case series.
- Valdec S1, Pasic P2, Soltermann A3, Thoma D4, Stadlinger B2, Rücker M2.
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- Boehm TK1.
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- Tsegga T1,2, Wright T3,4.
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- PMID 28105589
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- 応用地質学的視点からみた山体重力変形地形研究の進展と展望 (125周年記念特集 : 日本の応用地質学)
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