What caused this rippling look in the surface of this rock?

Science & Mathematics by Anonymous 2018-05-25 21:06:44

Social Science

4 answers

Saw this rock at Shasta Lake and was wondering what caused the wave like rippling motion on the surface of this rock? Please explain

Anonymous

It appears to be a conchoidal fracture pattern (possibly from a jackhammer?).
Anonymous

Its the same rippling you see on sandy beaches - wave action causes the ripples, then when the sand becomes rock the ripples are preserved.
Anonymous

Is it an arthropod fossil?
Anonymous

Wave action.