1. Preliminary geologic map of the Malibu Beach 7.5ʹ quadrangle, southern California a digital database / [electronic resource] Yale Public content 1997. 2006-07-18T19:14:13Z. 2006-07-18T19:14:13Z. Geological Survey (U.S.). The Survey ; USGS Information Services (Open-File Report Sales). English. Public. California and Los Angeles County.