Suggested citation and version history for


  Stewart, John H., 2007, World map showing surface and 
       subsurface distribution, and lithologic character of 
       Middle and Late Neoproterozoic rocks:  U.S. 
       Geological Survey Open-File Report 2007-1087 
       [http://pubs.usgs.gov/of/2007/1087/].


  Version 1.0


  April 17, 2007

  Provided  a layered version of the map as a native 
  Adobe Illustrator .ai file


  April 3, 2007

  Initial release online at
  http://pubs.usgs.gov/of/2007/1087/