Found 1 items, similar to Plutonic theory.
English → English (gcide) Definition: Plutonic theory 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]