FIGURE 3.5.-Locations of some pre-Quaternary features offset by the San Andreas fault in the California Coast Ranges. The La Honda Basin is an offset segment of the San Joaquin sedimentary basin (Stanley, 1987); boundary dashed where approximately located. Circled x's, bedrock exposures of unusual quartz-bearing mafic rocks at Logan, Gold Hill, and Eagle Rest Peak (Ross and others, 1973); squares, locations of the Pinnacles and Neenach Volcanic Formations (see fig. 3.6) (Matthews, 1976). Numbered dots: 1, Butano Sandstone and Point of Rocks Sandstone Member (of Ereyenhagen Formation), representing offset parts of an Eocene deep-sea fan (Clarke and Nilsen, 1973); 2, steeply southwest-dipping slopes of the San Joaquin and La Honda Basins during late Zemorrian time (Stanley, 1987); 3, deepest parts of the San Joaquin and La Honda Basins adjacent to the San Andreas fault during Saucesian time (Stanley, 1987); 4, unusual clasts in upper Miocene conglomerate in the Temblor Range east of fault and their postulated source area in the Gabilan Range west of fault (Huffman, 1972).