plutonism

== English == === Alternative forms === Plutonism === Etymology === From Pluto +‎ -ism, after the classical ruler of the underworld. === Noun === plutonism (countable and uncountable, plural plutonisms) The old geological theory that the rocks forming the Earth were formed in fire by volcanic activity, with a continuing gradual process of weathering and erosion, then deposited on the sea bed, re-formed into layers of sedimentary rock by heat and pressure, and raised again. ==== Synonyms ==== vulcanism ==== Coordinate terms ==== Neptunism ==== Related terms ==== Plutonist ==== Translations ==== == Romanian == === Etymology === Borrowed from French plutonisme. === Noun === plutonism n (uncountable) plutonism ==== Declension ====