Pebbles in tafoni, Pebble Beach, San Mateo County, California

Photo taken during ideal lighing conditions--scattered high clouds.

 

Tafoni results from cavernous weathering, most common along coasts where salts aid in etching holes in rock. Here, at Pebble Beach, where the beach is composed of granules and pebbles instead of sand-sized grains, waves have splashed granules/pebbles into the tafoni.

Done