In addition, San Gregorio Creek creates an estuary between Highway 1 and the tide line, creating all sorts of interesting effects. Stand in the warm creek waters and watch driftwood float downstream, studying the eddies behind the driftwood and the way they change the meandering course of the creek.
Geology of the San Francisco Bay Region tipped me off to this beach and its fossils and caves. The book warned that the fossil clams and the caves north of the beach might only be visible at very low tide. But we were there at only a moderately low tide, and there was plenty of room to walk around the headland and see everything there was to see.