| 单词 | mortar structure |
| 释义 | mortar structure [`mȯrd·ǝr ´strǝk·chǝr] PETROLOGY A cataclastic structure produced by dynamic metamorphism of crystalline rocks and characterized by a mica-free aggregate of finely crushed grains of quartz and feldspar filling the interstices between or forming borders on the edges of larger, rounded relicts. Also known as cataclastic structure; murbruk structure; porphyroclastic structure. |
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