Age of the Lospe Formation (Early Miocene) and origin of the Santa Maria Basin, California / by Richard G. Stanley [and seven others]. Petroleum source potential and thermal maturity of the Lospe Formation (Lower Miocene) near Point Sal, onshore Santa Maria Basin, California / by Richard G. Stanley [and four others]. Obispo Formation, California : remobiled pyroclastic material / by Jean-Luc Schneider and Richard V. Fisher.
[Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1996.
Washington : United States Government Printing Office