What is plutonie rock?
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1) Intrusive rocks or Plutonic rocks. When magma never reaches the surface and cools to form intrusions (dykes, sills etc) the resulting rocks are called plutonic. Depending on their silica content, they are called (in ascending order of silica content) gabbro, diorite, granite and pegmatite.
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an igneous rock (as granite) of holocrystalline granular texture regarded as having solidified at considerable depth below the surface.
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