| 单词 | banket conglomerate |
| 释义 | > as lemmasbanket conglomerate A gold-bearing conglomerate of quartz pebbles in a quartzitic matrix found in the Witwatersrand, South Africa (also with capital initial); (in extended use) any conglomerate of quartz pebbles in a quartzitic matrix visually similar to this. Usually as a mass noun; also banket conglomerate. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > composite rock > [noun] > conglomerate > specific pinnel1766 grauwacke1794 unguilite1799 greywacke1805 yolky-stone1805 nagelfluh1808 coombe rock1822 pebble bed1849 breccia1856 ceppo1881 banket1886 ouklip1892 crush-conglomerate1893 basal conglomerate1900 calcrete1902 rudite1904 fanglomerate1912 beach-rock1919 1886 Diamond Fields Advertiser in J. Crwys-Williams S. Afr. Despatches (1989) 81 Banket or Almond reef, the same as Witwatersrand, has been discovered in large quantities at Schoonspruit. 1890 Proc. Royal Geogr. Soc. 12 356 The auriferous lodes are for the most part conglomerate (Banket). 1954 ‘D. Divine’ Golden Fool vi. 57 Another smaller outcrop of the same stone—banket, he called it—a sort of fruit cake of pebbles and small pieces in a conglomerate. 1965 Proc. National Acad. Sci. U.S.A. 53 1195 The uraninite-bearing pyritic quartz-pebble conglomerates known as bankets..in the undated Lower Proterozoic strata of Brazil... These bankets form the gold-uranium ores of the Witwatersrand..and the uranium ores of Blind River. 2007 E. H. Macdonald Handbk. Gold Explor. & Eval. iii. 141 Basal conglomerates associated with each fresh cycle of erosion are the most important deposits in many alluvial gold areas. Notable examples are the Banket conglomerates of the Witwatersrand. < as lemmas |
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