Suggested citation and version history for:


  Billingsley, George H., Block, Debra L., and Dyer, 
       Helen C., 2006, Geologic map of the Peach Springs 
       30' x 60' quadrangle, Mohave and Coconino Counties, 
       northwestern Arizona:  U.S. Geological Survey 
       Scientific Investigations Map 2900 
       [http://pubs.usgs.gov/sim/2006/2900/].


  January 20, 2009
  Addendum
    Tp should be Kp
    Ts1 should be TKs1
    Ts2 should be TKs2

  November 14, 2006
  Added digital data, metadata, and readme file

  October 27, 2006
  Initial release online at
  http://pubs.usgs.gov/sim/2006/2900/