| 单词 | porcelain jasper |
| 释义 | > as lemmasporcelain jasper agate jasper, ‘an agate consisting of jasper with veinings and cloudings of chalcedony’ (1868 Dana Min. (ed. 5) 195). banded, striped, or ribbon jasper, a variety having the colours in broad stripes. Egyptian jasper, a variety much used in ancient art, occurring in nodules with zones of brown, yellow, or red. porcelain jasper (see porcelain n. and adj. Compounds 2).extracted from jaspern.1porcelain jasper porcelain jasper n. [after German Porzellanjaspis (attributed to A. G. Werner by C. A. S. Hoffmann 1789, in Bergmännisches Jrnl. 1 375)] Geology a hardened clay or shale resulting from thermal metamorphism (originally regarded as a variety of jasper); cf. porcellanite n. 1. ΘΚΠ the world > the earth > structure of the earth > constituent materials > clay > [noun] > other clays red clayc1475 urry1669 blae1724 cat-dirt1747 iron clay1750 till1762 mulatto clay1788 oak-tree clay1794 porcelain jasper1794 porcellanite1794 Karoo ground1836 plinthite1836 papa1851 Bradford clay1858 Indianaite1868 sinopite1868 hydrobiotite1881 pampas-clay1885 byon1892 potato clay1896 bentonite1898 quick clay1901 gumbotil1916 1794 R. Kirwan Elements Mineral. (ed. 2) I. 313 Porcellanite, Porcelain Jasper, of Werner. 1888 N. Amer. Rev. July 47 It occurs in a ferruginous porcelain jasper, in veins from half an inch to four inches in thickness. 1938 F. D. Adams Birth & Devel. Geol. Sci. (1954) vii. 225 The porcelain-jasper often displayed the impressions of plants, owing..to the fact that it was really a shale indurated and altered by the action of heat. 2003 D. A. Young Mind over Magma ii. 27 Werner also discussed pseudo-volcanic rocks such as earth slag, porcelain jasper, and half burned clays. < as lemmas |
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