| 单词 | opal dirt |
| 释义 | > as lemmasopal dirt opal dirt n. Australian earth of the kind in which opal is found. ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > kind of earth or soil > [noun] > mineral soil > others alum earth1612 cabook1834 laterite1893 ferricrete1902 murram1912 opal dirt1925 allite1930 Oxisol1960 1925 Ann. Rep. Dept. Mines New S. Wales 1924 85/2 The ‘Opal Dirt’ is picking ground, being simply a layer of clay or sandy clay overlain by sandstone. 1987 Courier-Mail (Brisbane) 16 Jan. (Great Outdoors Suppl.) 8/3 The famous opal ‘nobbies’ at Lightning Ridge are fossilised remains of aquatic plants embedded in the silts that formed the famous layer of opal dirt. < as lemmas |
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