pluton

Definitions of pluton
  1. noun
    large mass of intrusive igneous rock believed to have solidified deep within the earth
    synonyms: batholite, batholith, plutonic rock
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    types:
    granite
    plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz
    type of:
    igneous rock
    rock formed by the solidification of molten magma
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