Plutonic Rock (Igneous)

Plutonic Rock (Igneous) Definition

The term “Plutonic” in the field of geology refers to an igneous rock, wherein the magma had originally cooled, solidified, and crystalized underground. A plutonic rock is generally coarsely crystalline (phaneritic) and is formed during a massive geologic intrusion of magma. In fact, outcropping (or daylighting) plutonic rocks are geologic features that have been uplifted to the ground surface, long after solidifying underground.

Examples of Plutonic Rock Types in Igneous Rock Classification

  • quartzolite (silexite)
  • quartz-rich granitoids
  • alkali-feldspar granite
  • granite
  • granodiorite
  • tonalite
  • alkali-feldspar syenite
  • alkali-feldspar quartz syenite
  • foid-bearing alkali-feldspar syenite
  • quartz syenite
  • syenite
  • foid-bearing syenite
  • quartz monzonite
  • monzonite
  • foid-bearing monzonite
  • quarts monzodiorite
  • quartz monsogabbro
  • monsodiorite
  • monsogabbro
  • foid-bearing monsodiorite
  • foid-bearing monsogabbro
  • quartz diorite
  • quartz gabbro
  • quartz anorthosite
  • diorite
  • gabbro
  • anorthosite
  • foid-bearing diorite
  • foid-bearing gabbro
  • foid syenite
  • foid monzosyenite
  • foid monsodiorite (essexite)
  • foid monsogabbro (essexite)
  • foid diorite
  • foid gabbro (theralite)
  • foidolites
  • ultramafic rocks (ultramafitites)

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