Early Pleistocene deposits on the south slope of Mount Soledad have yielded a fauna of 20 species, mostly mollusks, which represent a littoral-sublittoral, par-tially protected embayment. ater temperatures were prob-ably as much as 8 ° cooler than at present. The fauna is probably temporally equivalent to the imms Point silt of the Palos Verdes Hills and the upper part of the Pico Formation of the Ventura basin.
