The Journal of California Anthropology

In the fall of 1960, archaeological excavations were made at site CCo-290, a shellmound on the north side of Brooks Island, which lies about three-quarters of a mile off the Richmond shore in San Francisco Bay, directly opposite the now-destroyed Ellis Landing mound, site CCo-295 (Nelson 1910). During the excavation, two small pebbles with simple painted decoration were recovered. Because of their relatively rare occurrence in California, these previously unreported pebbles seem to warrant a detailed description.