Plutonic

Plu*ton"ic

(?), a. [Cf. F. plutonique. See Pluto.] 1. Of or pertaining to Pluto; Plutonian; hence, pertaining to the interior of the earth; subterranean.
[1913 Webster]

2. Of, pertaining to, or designating, the system of the Plutonists; igneous; as, the Plutonic theory.
[1913 Webster]

Plutonic action (Geol.), the influence of volcanic heat and other subterranean forces under pressure. -- Plutonic rocks (Geol.), granite, porphyry, and some other igneous rocks, supposed to have consolidated from a melted state at a great depth from the surface. Cf. Intrusive rocks, under Intrusive. -- Plutonic theory. (Geol.) See Plutonism.
[1913 Webster]

 

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Sun 09th December 2018