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Rey Farve, Project Leader

Crump, M.A. 2011. What’s in my dirt? - Use of the National Geochemical Survey to determine EcoRegional background values for elemental constituents in Arkansas: a process, demonstration, and example application. White Paper and PowerPoint presentation. 47p.

U.S. Environmental Protection Agency (USEPA). 2005. Omernik’s Level III EcoRegions of the Continental United States. National Atlas of the United States. June 2005. (NationalAtlas.gov -> http://nationalatlas.gov/mld/ecoomrp.html.

U.S. Geological Survey (USGS). 2004. Open-File Report 2004-1001; Version 5.0. Updated Sept. 30, 2008. National Geochemical Survey - Database and Documentation. (http://tin.er.usgs.gov/geochem/doc/home.htm).