Version history for


  Slowey, Aaron J., and Rytuba, James J., 2008, Mercury 
       release from the Rathburn Mine, Petray Mine, and 
       Bear Valley saline springs, Colusa County, 
       California 2004-2006:  U.S. Geological Survey Open-
       File Report 2008-1179, 49 p. 
       [http://pubs.usgs.gov/of/2008/1179/].


  Version 1.0

  August 7, 2008
  Shapefiles added by J. Watson.

  July 24, 2008
  Made Table 3 available as .xls, .csv, and .txt files 
  as well as in the PDF

  June 18, 2008
  Initial release online at
  http://pubs.usgs.gov/of/2008/1179/