spreading ridge

GLOSSARY OF VOLCANIC TERMS

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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  • Ridge — 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 …   Wikipedia

  • spreading center — GLOSSARY OF VOLCANIC TERMS or spreading ridge Places on the ocean floor characterized by active volcanism and where separation of lithospheric plates takes place …   Glossary of volcanic terms

  • Ridge-push — is a proposed mechanism for plate motion in plate tectonics. Because mid ocean ridges lie at a higher elevation than the rest of the ocean floor, gravity causes the ridge to push on the lithosphere that lies farther from the ridge.As molten magma …   Wikipedia

  • Gakkel Ridge — Main bathymetric/topographic features of the Arctic Ocean The Gakkel Ridge (formerly known as the Nansen Cordillera and Arctic Mid Ocean Ridge)[1] is a mid oceanic ridge, a divergent tectonic plate boundary between the North American Plate …   Wikipedia

  • Mid-Atlantic Ridge — /mid at lan tik, mid at lan / a north south suboceanic ridge in the Atlantic Ocean from Iceland to Antarctica on whose crest are several groups of islands; shown by plate tectonics to be the axis along which North America has split away from… …   Universalium

  • Ninety East Ridge — The Ninety East Ridge (also rendered as Ninetyeast Ridge, 90E Ridge or 90°E Ridge) is a linear, aseismic, age progressive seamount chain in the Indian Ocean and is named for its near parallel strike along the 90th meridian. It is approximately… …   Wikipedia

  • oceanic ridge — Continuous, submarine mountain chain extending approximately 50,000 mi (80,000 km) through all the world s oceans, separating them into distinct basins. The main ridge extends down the middle of the Atlantic Ocean, passes between Africa and… …   Universalium

  • Mid-ocean ridge — Oceanic ridge, including a black smoker A mid ocean ridge is a general term for an underwater mountain system that consists of various mountain ranges (chains), typically having a valley known as a rift running along its spine, formed by plate… …   Wikipedia

  • Seafloor spreading — Age of oceanic crust; youngest (red) is along spreading centers. Seafloor spreading is a process that occurs at mid ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor… …   Wikipedia

  • Mid-Atlantic Ridge — The location of the Mid Atlantic Ridge The ridge was central in the breakup of Pangaea that began some 180 million years ago …   Wikipedia

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