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continent formation

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continent formation [¦känt·ən¦ent·əl fər′mā·shən]
(geology)
A series of six or seven major episodes, resulting from the buildup of radioactive heat and then the melting or partial melting of the earth's interior; the molten rock melt rises to the surface, differentiating into less primitive lavas; the continent then nucleates, differentiates, and grows from oceanic crust and mantle.


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The possible presence of granite also suggests that tectonic plate movement and continent formation may have occurred on Venus, as well as recycling of water and carbon between the planet's mantle and atmosphere.
The theory of plate tectonics holds that the Earth's geological processes, from earthquakes and volcanoes to mountain-building and continent formation, are the result of the slow movements of a dozen or so gigantic slabs that shift over the asthenosphere, a molten region of the upper mantle.
 
 
 
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