| 单词 | greywacke |
| 释义 | greywacke /grā-wakˈə or -wakˈi/ (geology)nounAn indurated sedimentary rock composed of grains (round or angular) and splinters of quartz, feldspar, slate, etc in a hard matrix ORIGIN: Ger Grauwacke, partly translated, partly adopted greywacke-slateˈ noun A fine-grained fissile greywacke |
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