Suggested citation and version history for


  Wentworth, C.M., Fisher, G.R., Levine, Paia, and 
       Jachens, R.C., 1995, revised 2012, The surface of 
       crystalline basement, Great Valley and Sierra 
       Nevada, California; a digital map database: 
       U.S. Geological Survey Open-File Report 95-96, 
       v. 1.11, 18 p. and database (Available at 
       http://pubs.usgs.gov/of/1995/96/.)


  Version 1.11

  June 22, 2012

      - fixed a significant problem in the map figure 
       (fig. 1) in the two PDF files (a critical seismic 
       reflection line was missing). 


  November 1, 2007

      - changed text description of the projection of 
        ArcInfo coverages to match the correct projection 
        already stored in the coverage .prj files.
      - added pdf version of postscript well list 
        ccb_wells.ps as ccb_wells.pdf.
      - added pdf version of page-sized map (fig. 1) 
        prepared in color from ccb_fig1.ps.as ccb_fig.pdf 
        (no change to ccb_fig.ps).
      - added shape file equivalents in geographic 
        projection (decimal degrees,  NAD27) for all the 
        coverage data files. 
      - revised text to reflect the above changes, removed 
        or replaced  outdated computer instructions, and 
        made other minor improvements.
      - replaced text file ccbsmt.text as revised and added 
        postscript and  pdf equivalents ccbsmt.ps and 
        ccbsmt.pdf (latter includes fig. 1,  others do 
        not).
      - migrated report to http://pubs.usgs.gov/of/1995/96/


  Version 1.0
  1995

  Initial release online at
  http://wrgis.wr.usgs.gov/open-file/of95-96/