Geochemistry of soils in the US from the RASS database

Online link https://mrdata.usgs.gov/rass/soil/
Description Geochemical data for soils collected by USGS personnel and analyzed by the USGS. These data were originally entered into the Rock Analysis Storage System (RASS), a database that is now merged into the National Geochemistry Database.
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Shapefile Geochemical data for soils collected by USGS personnel and analyzed by USGS. These data were part of the Rock Analysis Storage System and are now merged into the National Geochemistry Database. https://mrdata.usgs.gov/rass/soil/rasssoil.zip