| 单词 | alum shale |
| 释义 | > as lemmasalum shale alum shale n. an iron-rich shale or slate containing alum formed by weathering of the clay component. ΚΠ 1765 J. Smeaton Reports (1797) I. 231 Covenants for cleansing the harbour of Whitby from the allum shail. 1794 J. Tuke Gen. View Agric. N. Riding Yorks. 11 The soils are a brownish clay, a clayey loam, a loam upon a strong clay, a lightish soil upon an allum shale, a loam upon a free-stone, [etc.]. 1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) I. 111 Such alum-shales as contain too little bitumen for the roasting process. 1922 T. M. Lowry Inorg. Chem. ii. 24 Salt may be separated from sand, nitre, or saltpetre from soil,..and alum from burnt alum-shale. 2002 M. D. Kennedy Cultural Formations Postcommunism v. 199 The Sillamäe plant originally processed alum shale for its uranium. < as lemmas |
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