Version history for:


  Muffler, L.J.P., Robinson, J.E., Felgar, T.J., 
       Dutton, D.R., and Clynne, M.A., 2010, Database for 
       the geologic map of Lassen Volcanic National Park 
       and vicinity, California, in Clynne, M.A., and 
       Muffler, L.J.P., Geologic map of Lassen Volcanic 
       National Park and vicinity, California:  U.S. 
       Geological Survey Scientific Investigations Map 
       2899, scale 1:24,000 
       [http://pubs.usgs.gov/sim/2899/database.html].


  Version 1.0

  February 2011
  Released as a CD-ROM to accompany the paper map

  December 30, 2010
  Initial release online at 
  http://pubs.usgs.gov/sim/2899/database.html