“backwash ripple mark”的概念、定义、翻译、参考文献-科学参考

单词	backwash ripple mark
释义	backwash ripple mark [`bak´wäsh `rip·ǝl ´märk] ^GEOLOGY Ripple marks that are broad and flat and parallel to the shoreline, with narrow, shallow troughs and crests about 30 centimeters apart; formed by backwash above the maximum wave retreat level.
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