Ripple marks Meaning, Definition & Usage
- 
       noun one of a series of small ridges produced in sand by water currents or by wind
       
       
 ripple mark.
 
WordNet
Definitions
- a system of parallel ridges on sand, produced by wind, by the current of a steam, or by the agitation of wind waves; also (Geol.) , a system of parallel ridges on the surface of a sandstone stratum.