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单词 pea grit
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pea grit
pea grit n. (a) Geology pisolitic limestone; (b) = pea gravel n.
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the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > limestone > pisolite
peastone1770
pea grit1834
pisolite1845
1834 R. I. Murchison Outl. Geol. Cheltenham 12 The lowest member of the Inferior Oolite... It is of a rusty brown colour, and is in great part made up of small flat concretions... It is called ‘Pea Grit’ by the country people, and is a useful stone, when employed for gate-posts and other rough work.
1865 D. Page Handbk. Geol. Terms (ed. 2) 352 Pea-grit, a coarse pisolitic limestone..composed of concretionary bodies.
1984 Systematic Zool. 33 351/1 Smith uses taphonomic criteria to reconstruct the environment during deposition of the Jurassic Pea Grit Series in England.
2001 Exotic & Greenhouse Gardening June 87/1 To aid root growth, small gravel or pea grit should be added to the compost.
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