plutonism

plutonism
plutonist, n.
/plooht"n iz'euhm/, n. Geol.
1. the intrusion of magma and associated deep-seated processes within the earth's crust.
2. (often cap.) the disproven theory that all rocks formed by solidification of a molten mass, promulgated by Scottish geologist James Hutton (1726-97).
[1840-50; PLUTON(IC) + -ISM]

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Universalium. 2010.

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