Version history for Evarts, R.C., 2004, Geologic map of the Ridgefield quadrangle, Clark and Cowlitz Counties, Washington, digital database by Dinterman, Philip, and Block, Jessica: U.S. Geological Survey Scientific Investigations Map 2844, 1:24,000. Version 1.1, July 22, 2005 SIM2844_db.zip has these revised files: ridgefield.mdb ridgefield.mxd ridgefield.tif SIM2844_shp.zip has these revised files: rdg_geo_poly.dbf rdg_geo_poly.prj rdg_geo_poly.shp rdg_geo_poly.shp.xml rdg_geo_poly.shx ridgefield.tif Version 1.0, November 17, 2004 Intital release online at http://pubs.usgs.gov/sim/2004/2844/