Wave ripple marks of Shirahama

"20 minutes from the Nanki-Shirahama Interchange on the Kisei Expressway via Prefectural Route 34. These fossil wave ripple marks can be seen along the coast from Ezura Beach to Sakata in Shirahama Town. The marks were formed by the action of waves on sand on what was once the sea floor, which then became coated with a clay-like material that later fossilized, preserving them for eternity. The marks are called ""fossive wave"" and believed to have been formed in the Tertiary Period of the Cenozoic Era some 15 million years ago, and today they have been designated a National Natural Monument."