| 单词 | saddle reef |
| 释义 | > as lemmassaddle reef saddle reef n. Mining and Geology a body of ore, esp. auriferous quartz, found in the curve of an anticline, thickest at the centre and tapering downwards in each direction; a similar body in the trough of a syncline; cf. sense 5c. ΘΚΠ the world > the earth > minerals > mineral deposits > [noun] > vein > curving saddle1860 saddle reef1860 saddle vein1935 1860 Mining Surveyors' Rep. (Mining Dept., Victoria) Aug. 216 The Wellington Reef..is what is termed by miners a saddle reef, or, in other words, a vein of quartz branching from the cap in two distinct underlies, viz. one to the east and the other to the west. 1906 J. Park Text-bk. Mining Geol. ii. 49 The gold-bearing veins at Cape Terawhiti, near Wellington, in New Zealand, are interesting examples of saddle-reefs which exhibit both an anticlinal and synclinal arrangement. 1967 W. G. Moore Dict. Geogr. (rev. ed.) 188 Saddle-reef, a lens-shaped strip of rock formed in a similar way to a Phacolith, but consisting of Quartz. 1992 Geol. Mag. 129 628 (table) Common: saddle reefs and quartz veins along axial planes. < as lemmas |
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