noun🔗SharePlutonismeThe 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."The old geology textbook explained plutonism as the way volcanic activity deep within the earth formed rocks, which then eroded and reformed into layers over time. "L'ancien manuel de géologie expliquait le plutonisme comme la façon dont l'activité volcanique au fond de la terre formait des roches, qui s'érodaient ensuite et se reformaient en couches au fil du temps.geologytheorysciencehistoryChat with AIVocabulary GamePractice Reading