"From 65 million years ago" . . . . "Guidebooks"@en . . . "Geology of the central part of the Fillmore quadrangle, Ventura County, California"@en . . "AAPG 1969 field trip, Fillmore area"@en . . . . . . . . . . . . "Geology of the central part of the Fillmore Quadrangle, Ventura County, California : [guidebook for the] June 6, 1969 field trip"@en . . . .