Version history for


  Singer, Donald A., Berger, Vladimir I., and Moring, 
       Barry C., 2008, Porphyry copper deposits of the 
       World; database And Grade and tonnage models, 2008:  
       U.S. Geological Survey Open-File Report 2008-1155, 
       [http://pubs.usgs.gov/of/2008/1155/].


  Version 1.0

  June 20, 2008
  Added missing PorCuGE2008.kmz Google Earth file
  Packaged the shapefile components (PorCu_2008.dbf, 
       PorCu_2008.prj, PorCu_2008.shp, PorCu_2008.shx) into 
       a single .zip file

  June 18, 2008
  Initial release online at
  http://pubs.usgs.gov/of/2008/1155/