| 单词 | katamorphism |
| 释义 | katamorphism Petrol.|kætəˈmɔːfɪz(ə)m|
[f. Gr. κατά down + µορϕή form: see -ism.]
Alteration of rocks (usually at or near the earth's surface) characterized by the formation of chemically simpler minerals from more complex ones. Hence kataˈmorphic a.
1904C. R. Van Hise in Monogr. U.S. Geol. Survey XLVII. 43 The geological factor which in this treatise will serve as the primary basis for a classification of metamorphism is the dominant factor of depth. On this basis metamorphism will be classified into (1) alterations in the zone of katamorphism and (2) alterations in the zone of anamorphism... The zone of katamorphism may be defined as the zone in which the alterations of rocks result in the production of simple compounds from more complex ones. Ibid. 162 Katamorphic zone. 1916F. H. Lahee Field Geol. ix. 230 Any kind of alteration that any rock has undergone, whether katamorphic or anamorphic, comes under the head of metamorphism, but there are many geologists who prefer to restrict the meaning of the more general term so that it does not include weathering. 1946Amer. Mineralogist XXXI. 288 It is very well known that oxidation is one of the important chemical processes of katamorphism, especially of weathering. |
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