wavemark

\\ˈ ̷ ̷ˌ ̷ ̷\ noun

Etymology: wave (II) + mark

1. : a very small ridge of sand made by a wave when it advances upon a low sandy beach and marking the limit of advance

2. : one of many undulations on the bedding surfaces of a sedimentary rock due to wave action during the period of deposition — compare ripple mark