| 释义 |
dunstone Mining and Geol.|ˈdʌnstəʊn|
[f. dun a.; cf. also dun-courses, dun-row, s.v. dun a. 3 c.]
Stone of a dun or dull brown colour; applied locally to different sedimentary rocks, as magnesian limestone, ironstone, sandstone, and sometimes to igneous rocks, such as dolerite.
1777G. Forster Voy. round World I. 20 A few..of the kind which the Derbyshire miners call dunstone. 1807Vancouver Agric. Devon (1813) 19 The soil generally consists of a hazel-coloured loam, or free dunstone. 1870R. S. Hawker Prose Wks. (1893) 1 One wide, wild stretch of rocky moorland, broken with masses of dunstone. 1887H. B. Woodward Geol. Eng. & Wales (ed. 2) 577 Dolerites are exposed west of St. Austell..In places they are called ‘Dunstones’. |