TY - RPRT TI - Strontium isotope evidence for the age of the Vaqueros Formation and latest Oligocene marine transgression in the northern Santa Maria Province, Central California. Stratigraphic sections and gamma-ray spectrometry from five outcrops of the Monterey Formation in southwestern California; Naples Beach, Point Pedermales, Lion's Head, Shell Beach, and Point Buchon AU - Margaret A. Keller AU - Marilyn E. Tennyson AU - Rodger E. Denison AU - Jon R. Schwalbach AU - Kevin M. Bohacs PY - 1995 DO - 10.3133/b1995pq UR - https://pubs.usgs.gov/publication/b1995PQ ID - b1995PQ ER -