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continental crust |
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continental crust [¦känt·ən¦ent·əl ′krəst] (geology) The basement complex of rock, that is, metamorphosed sedimentary and volcanic rock with associated igneous rocks mainly granitic, that underlies the continents and the continental shelves. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Volcanoes most often form on or near tectonic plate boundaries, regions where Earth's nine continental crusts converge (see map). This former seafloor, or oceanic crust, makes up the belt, and differs in composition and density from the surrounding two continental crusts. |
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