mid-ocean ridge
noun Date: 1961 an elevated region with a central valley on an ocean floor at the boundary between two diverging tectonic plates where new crust forms from upwelling magma

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • mid-ocean ridge — /mid oh sheuhn/ any of several seismically active submarine mountain ranges that extend through the Atlantic, Indian, and South Pacific oceans: each is hypothesized to be the locus of seafloor spreading. [1960 65] * * * mid ocean ridge noun… …   Useful english dictionary

  • 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

  • mid-ocean ridge — noun a mid oceanic ridge …   Wiktionary

  • mid-ocean ridge — /mid oh sheuhn/ any of several seismically active submarine mountain ranges that extend through the Atlantic, Indian, and South Pacific oceans: each is hypothesized to be the locus of seafloor spreading. [1960 65] * * * …   Universalium

  • mid-ocean ridge — noun Geology a long, seismically active submarine ridge system situated in the middle of an ocean basin …   English new terms dictionary

  • mid-oceanic ridge — [mid ō′shənmid ō΄shē an′ik] n. the continuous, double ridged chain of mountains on the ocean floor, extending through the middle of the Atlantic Ocean and into the Indian and Pacific oceans: also called mid ocean ridge [mid ō′shən] * * * …   Universalium

  • mid-oceanic ridge — [mid ō′shənmid ō΄shē an′ik] n. the continuous, double ridged chain of mountains on the ocean floor, extending through the middle of the Atlantic Ocean and into the Indian and Pacific oceans: also called mid ocean ridge [mid ō′shən] …   English World dictionary

  • 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

  • mid-oceanic ridge — noun any of an interconnected system of broad submarine rises formed by plate tectonics Syn: mid ocean ridge …   Wiktionary

  • 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

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