| 单词 | rhomboid ripple mark | 
| 释义 | rhomboid ripple mark [`räm´bȯid `rip·ǝl ´märk]  GEOLOGY An aqueous current ripple mark characterized by a reticular arrangement of diamond-shaped tongues of sand, with each tongue having two acute angles, one pointing upcurrent and the other pointing downcurrent.  | 
	
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