It’s a whole world of physics and geometry there, in circles and arcs and rivulets and waves.  This is a color photo but to me it’s most striking not in its color, but in its grayness that just emphasizes its horizontal layers of texture, its repetition, its variation, the darks against lights, the sense of movement in some areas and the calm in others, and, finally, the curl of a wave-top breaking — in short, the things oceans do near the shore.