| 单词 | ripple mark |
| 释义 | ripple mark (once / 337695 pages) n WORD FAMILY ripple mark: ripple marks USAGE EXAMPLESRipple marks on a slab of Potsdam sandstone. Atwood, Wallace W., The Geography of the Region about D...(2011) The rocks show ripple marks which were made by waves when the rock material was soft sand and mud. Interior, United States Dept. of the, Glacier National Park [Montana](2011) Ripple marks and current bedding further point, to the shallowness of the water at the places where the rocks were made. Various, Encyclopaedia Britannica, 11th Edit...(2010) n one of a series of small ridges produced in sand by water currents or by wind Hyper ridge a long narrow natural elevation or striation |
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