ripple-mark index波痕指数
ripple-mark amplitude波痕振幅
ripple-mark波痕
superimposed ripple-mark迭加波痕
ripple e mark波痕
ripple-mark wave length波痕波长
aeolian ripple mark风成波痕
complex ripple mark复涟痕
pseudo ripple mark[地质] 假波痕
N（名词） one of a series of small wavy ridges of sand formed by waves on a beach, by a current in a sandy riverbed, or by wind on land: sometimes found fossilized on bedding planes of sedimentary rock 波痕