Geochemistry of soils in the US from the PLUTO database

This dataset contains geochemical data for soils collected in the
United States and analyzed in the analytical laboratories of the
Geologic Division of the U.S. Geological Survey (USGS). These data
represent analyses of soil samples collected in support of various
USGS programs. The data were originally entered into the in-house
PLUTO database which was used by the Geologic Division from the mid-
1970's through the mid-1990's to archive geochemical data. A portion
of the PLUTO data base is published as: Baedecker, P.A., Grossman,
J.N., and Buttleman, K.P., 1998, National Geochemical Data base: PLUTO
geochemical data base for the United States: U.S. Geological Survey
Digital Data Series DDS-47. The data presented here are derived from
DDS-47.