![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgbYQtPIAN7qI2w48y4GU5MY2GwK6ue0KidQfPI7EArqX6Wn2Ghv-npk7Waq9NuJmhRBr1SSHbpxda2idVfAH84nhH1G36Lv91wuELnrFcV0JcEEB0D3CuAsR9WHvsw7k98zFxBw/s320/usgs-copper+soil.jpg) |
Copper in soil at 0-5 cm depth |
From 2007 to 2010, the U.S. Geological Survey collected soil samples
from 4,857 sites throughout the conterminous United States to support the North American Soil Geochemical Landscapes Project.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5rUW3PwfaMXSmSLrRMkCRfgWDwo-z-JKogGfMROovFPRZHXC4w2pE-IGJIZx2yFdr03pQiho2TDHr3T-0_3WVhSBoCSH51QIAncMD20PwvXUG8jj5wqM77btRGLxg3p-QLg_XZg/s320/hematitie+a.jpg) |
Hematite (iron oxide) in A Horizon, note enrichment in AZ |
The objective was to provide background data for, 'Understanding the variability in the natural abundance and spatial distribution of chemical elements (geochemical background) in the near-surface environment of the Earth is important for such fields as risk-based assessment of contaminated land, environmental regulation, human and animal health, agriculture, land-use planning, mineral exploration, and water quality. Geochemical mapping, conducted at appropriate scales, is the primary method for establishing this variability.'
To access the interactive soil chemistry map: https://mrdata.usgs.gov/soilgeochemistry/#/periodictable
To access the interactive soil mineralogy map: https://mrdata.usgs.gov/soilgeochemistry/#/mineralogy
USGS Soil Chemistry and Mineralogy publication: https://pubs.usgs.gov/of/2014/1082/pdf/ofr2014-1082.pdf
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