Version history for Stone, Paul, compiler, 2006, Geologic map of the west half of the Blythe 30' by 60' quadrangle, Riverside County, California and La Paz County, Arizona: U.S. Geological Survey Scientific Investigations Map 2922, scale 1:100,000 [available on the World Wide Web at URL http://pubs.usgs.gov/sim/2006/2922/ ]. Version 1.0 January 18, 2007 Fixed a typo on the map file October 27, 2006 Fixed a few errors in the readme file October 13, 2006 Fixed a few errors in the metadata file October 5, 2006 Replaced SIM2922_map.pdf with one that prints better July 2, 2006 Initial release online at http://pubs.usgs.gov/sim/2006/2922/