README for U.S. Geological Survey Data Series 771 (Database 
  for Miscellaneous Investigations Series Map I-2455)

  Database for the Geologic Map of Newberry Volcano, 
  Deschutes, Klamath, and Lake Counties, Oregon

  By Joseph A. Bard, David W. Ramsey, Norman S. MacLeod, 
  David R. Sherrod, Lawrence A. Chitwood, and Robert A. 
  Jensen

  This digital database was compiled in ArcGIS version 10 
  personal geodatabase format and consists of geologic map 
  feature classes for each of the two printed map sheets 
  (Sheet 1 and Sheet 2) from the Geologic Map of Newberry 
  Volcano, Deschutes, Klamath, and Lake Counties, Oregon; 
  U.S. Geological Survey Miscellaneous Investigations Series 
  Map I-2455.  ArcGIS-compatible GIS software is, therefore, 
  required to use the files of this database.  The 
  geodatabase is stored in a single zipped folder (6.58 MB in 
  size) in this release for ease of transfer.  The scale of 
  the source mapping limits the spatial resolution of the 
  database to 1:62,500 scale or less detailed for Sheet 1 and 
  1:24,000 scale or less detailed for Sheet 2.