Online link | https://doi.org/10.3133/sir20175118 |
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Description | Between 2007 and 2013, the U.S. Geological Survey conducted a low-density (1 site per 1,600 square kilometers, 4,857 sites) geochemical and mineralogical survey of soils in the conterminous United States. The sampling protocol for the national-scale surve |
Originators | Smith, David B., Solano, Federico, Woodruff, Laurel G., Cannon, William F., Ellefsen, Karl J. |
Publication | U.S. Geological Survey Scientific Investigations Report 2017-5118 |