Geochemical and mineralogical maps for soils of the conterminous United States

Online link http://pubs.usgs.gov/of/2014/1082/
Description Geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS-801
Originators Smith, David B.; Cannon, William F.; Woodruff, Laurel G.; Solano, Federico; and Ellefsen, Karl J.
Publication U.S. Geological Survey Open-File Report 2014-1082
Metadata Questions and answers
Concentration of potassium in the A horizon of soils in the conterminous US
Concentration of potassium in the A horizon of soils in the conterminous US