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oceanic crust
(redirected from Ocean crust)

   Also found in: Dictionary/thesaurus, Wikipedia 0.03 sec.
oceanic crust [‚ō·shē′an·ik ′krəst]
(geology)
A thick mass of igneous rock which lies under the ocean floor.


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As ocean crust is pushed under another block, or subducted, pressure increases with only modest rise in temperature, squeezing and drying the rocks without melting them.
Modern vents dot spreading ridges, where blocks of ocean crust are moving apart and making room for magma from below to travel upward and create new ocean crust.
The exhumed dome of old mantle rock, called a core complex, was effectively woven into the fabric of "new" ocean crust.
 
 
 
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