Rip'ple-mārk, n.
n. 1. The mark produced on sand or mud by a gentle flow or undulatory movement in water. 2. (Geol.) A mark on the surface of a rock resembling that made by receding waves on a sea-beach.
n. 1. The mark produced on sand or mud by a gentle flow or undulatory movement in water. 2. (Geol.) A mark on the surface of a rock resembling that made by receding waves on a sea-beach.