Someone posted a pic of this rock in the last couple of days. I can't find the original post, but I got an ID on the rock from a geologist friend. He says:
"My best guess is that the stone is silty sandstone and the oval formations are fossil limpet shells that have had their conical tops removed by beach erosion."
Now if I can find the original poster.
"My best guess is that the stone is silty sandstone and the oval formations are fossil limpet shells that have had their conical tops removed by beach erosion."
Now if I can find the original poster.