Age of the Lospe Formation (Early Miocene) and Origin of the Santa Maria Basin, California; Petroleum Source Potential and Thermal Maturity of the Lospe Formation (Lower Miocene) near Point Sal, Onshore Santa Maria Basin, California; Obispo Formation, California: Remobilized Pyroclastic Material; U.S. Geological Survey Bulletin 1995 - M, N, O
United States Government Printing Office, 1996. softcover, 11' x 8.5", 77+ pages. from the title page, "Evolution of sedimentary basins/Onshore Oil and Gas Investigations Santa Maria Province. More