| 单词 | magmatism | 
| 释义 | magmatismn. Geology.  1.  The theory advocated by magmatists. rare. ΘΚΠ the world > the earth > earth sciences > theory of formation of earth > 			[noun]		 > internal heat volcanism1811 vulcanism1819 plutonism1842 undation theory1932 magmatism1948 1948    Q. Jrnl. Geol. Soc. 103 140  				Dr. Reynolds ‘tolls the knell’ of the passing theory of ‘magmatism’ as an all-embracing explanation of the origin of all plutonic rocks. 1948    Q. Jrnl. Geol. Soc. 103 141  				A new era in petrogeny, an era in which ‘magmatism’ will become incorporated with ‘transformism’, plutonic processes will become closely linked with metamorphic processes, and petrogenesis..will become an integral part of a wider science of geochemistry.  2.  Motion or solidification of magma; magmatic activity. ΘΚΠ the world > the earth > structure of the earth > formation of features > tectonization or diastrophism > 			[noun]		 > upwelling of magma magmatism1952 sea-floor spreading1961 pulse1964 ocean-floor spreading1965 plume1967 the world > the earth > structure of the earth > formation of features > metamorphism > 			[noun]		 > magmatism plutonism1879 piezo-crystallization1895 assimilation1903 palingenesis1907 syntexis1911 rheomorphism1937 magmatism1952 1952    H. Ramberg Origin Metamorphic & Metasomatic Rocks 3 		(heading)	  				Natural boundary between metamorphism and magmatism. 1974    Nature 19 Apr. 650/1  				Seismicity, tectonism and magmatism are now concentrated near plate margins. 1992    S. P. Maran Astron. & Astrophysics Encycl. 454/2  				The early global magmatism was largely completed by about 4.3 billion years ago. This entry has been updated (OED Third Edition, March 2000; most recently modified version published online March 2022). <  | 
	
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