Definitions for "Ripple marks"
wave-like patterns in sedimentary bedding due to movement of water.
Undulations produced by fluid movement over SEDIMENTS. Oscillatory currents produce symmetric RIPPLES whereas a well-defined current direction produces asymmetrical RIPPLES. The crest line of RIPPLES may be straight or sinuous. The characteristic features of ripples depend upon current velocity, PARTICLE SIZE, persistence of current direction and whether the fluid is air or water. SAND DUNES may be regarded as a special kind of 'super'-ripple.
A series of parallel or sub-parallel ridges in sand or sediment that is caused by the rhythmic or directional movement of wind or water.