20250507 07424900 1.0 TRUE RGM_003A_SanBernardino_1986_Sheet1of5 Bortugno, E.J., and Spittler, T.E. : California Division of Mines and Geology Regional Geologic Map 3A, scale 1:250,000. http://ngmdb.usgs.gov/Prodesc/proddesc_45.htm