| 单词 | siltstone |
| 释义 | > as lemmassiltstone siltstone n. Geology (see quot. 1920). ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > sandstone > fine sandstone post1775 siltstone1920 1920 A. Holmes Nomencl. Petrol. 211 Siltstone, a very fine-grained sandstone, the particles of which are predominantly of silt grade. 1946 L. D. Stamp Britain's Struct. & Scenery xii. 116 The lower Carboniferous deposits in the Central Lowlands of Scotland are sandstones, shales, cementstones and siltstones with only occasional bands of limestones. 1977 A. Hallam Planet Earth 264 The graptolites..are often common in offshore black shales and siltstones. < as lemmas |
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