Version history for Langenheim, V.E., Biehler, Shawn, McPhee, D.K., McCabe, C.A., Watt, J.T., Anderson, M.L., Chuchel, B.A., and Stoffer, P., 2007, Preliminary isostatic gravity map of Joshua Tree National Park and vicinity, southern California: U.S. Geological Survey Open-File Report 2007-1218, scale 1:100,000 [http://pubs.usgs.gov/of/2007/1218/]. Version 1.0 September 21, 2007 Added metadata of2007-1218_metadata.txt September 18, 2007 Added .csv versions of the five sheets in the .xls file September 15, 2007 Replaced corrupted map PDF August 7, 2007 Initial release online at http://pubs.usgs.gov/of/2007/1218/