graywacke

英 ['ɡreɪ,wækə]美 ['gre,wæk]

n. 杂砂岩;硬砂岩(等于greywacke)

英文词源

graywacke (n.)

also greywacke, 1806, partial translation of German grauwacke; see gray (adj.) + wacke.

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