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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Ridge ist der Name vonAntonia Ridge, SchriftstellerinJohn Rollin Ridge (1827–1867), indianischer Autor
Tom Ridge (* 1946), US-amerikanischer PolitikerRidge (Texas), Ort in den Vereinigten StaatenRidge (England), Ort in Hertfordshire
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