单词 | rock drumlin |
释义 | rock drumlin [`räk ¦drǝm·lǝn] GEOLOGY A smooth, streamlined hill modeled by glacial erosion, which has a core of bedrock usually veneered with a layer of glacial till and which resembles a true drumlin in outline and form but is generally less symmetrical and less regularly shaped. Also known as drumlinoid; false drumlin; rocdrumlin; rock drum. |
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