so i was strolling along the top of some rocks on the beach the other day (santa cruz, CA), and some very strange designs in the rock faces caught my eye.
they were brownish-light brown, tribal-like natural patterns in the sides of the rocks.
how would water/erosion form these strange grainlike patterns?
are these similar to the rings in trees? some kind of measureable effect which grows with time?
i'd appreciate any insight
