noun🔗Share火成说，深成说。 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."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. "那本旧地质学课本解释说，深成说是指地球深处的火山活动形成岩石的方式，这些岩石随着时间的推移会受到侵蚀，然后重新形成为层层叠叠的地层。geologytheorysciencehistoryChat with AIVocabulary GamePractice Reading
