| 释义 |
metacryst Petrol.|ˈmɛtəkrɪst|
[f. meta- + -cryst after phenocryst.]
A large crystal formed in a metamorphic rock by recrystallization.
1913W. Lindgren Mineral Deposits xi. 158 An individual in another may be briefly called a metasome; if the metasome develops strongly with crystal outlines it may be called a metacryst. 1932F. F. Grout Petrogr. & Petrol. 365 Metacrysts commonly have abundant inclusions..and in some the inclusions are oriented so as to show that the metacrysts grew by replacement. 1963D. W. & E. E. Humphries tr. Termier's Erosion & Sedimentation xvii. 339 Dolomite is present in limestones as rhombic ‘metacrysts’ which can cut across original structures (for example, oolites) and fossils. |