A mantle plume is a posited thermal abnormality where hot rock nucleates at the core-mantle boundary and rises through the Earth`s mantle becoming a diapir in the Earth`s crust. Such plumes were invoked in 1971 to explain volcanic regions that were not thought to be explicable by the then-new theory of plate tectonics. Some of these volcanoes li.....
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http://en.wikipedia.org/wiki/Mantle_plume
A rising mass of hot mantle material that can create an area of volcanic activity in the center of a
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http://www.encyclo.co.uk/local/22392
A buoyant mass of hot mantle material that rises to the base of the lithosphere. Mantle plumes commonly produce volcanic activity and structural deformation in the central part of lithospheric plates.
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http://www.evcforum.net/WebPages/Glossary_Geology.html
A hypothetical column of hot, partially molten material that rises from an indeterminate depth in the mantle and is thought by some geologists to provide a driving force for plate movement. compare hot spot .
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https://www.encyclo.co.uk/local/22327
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