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convection cell |
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convection cell [kən′vek·shən ‚sel] (geophysics) A concept in plate tectonics that accounts for the lateral or the upward and downward movement of subcrustal mantle material as due to heat variation in the earth. (meteorology) An atmospheric unit in which organized convective fluid motion occurs. 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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Oceanic islands tend to occur at the young ends of hotspot trails because they record the passage of oceanic plates over rising convection cells (plumes) in the mantle, of the propagation of cracks in the lithosphere. Using a suitable catalyzing agent such as temperature differential, fluid in a pan evolves into a more complex structure, convection cells, which are considered an emergent property. To explain the reach of the Pacific and other large plates, some scientists suggested that the plates exert a controlling influence on mantle circulation, stretching the convection cells far beyond their natural breadth. |
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