Version history for Graymer, R.W. Moring, B.C., Saucedo, G.J., Wentworth, C.M., Brabb, E.E., and Knudsen, K.L., 2006, Geologic map of the San Francisco Bay region: U.S. Geological Survey Scientific Investigations Map 2918. [available on the World Wide Web at http://pubs.usgs.gov/sim/2006/2918/ ]. Version 1.0, April 18, 2006 Initial release online at http://pubs.usgs.gov/sim/2006/2918/