Sediment samples collected for the National Geochemical Survey (NGS; 1999-2011) which was conceived, designed, and implemented by Andrew Grosz, retired USGS geologist. It was overseen and funded by the Mineral Resources Program. It was “a collaborative effort between government, industry, and academia to map the geochemical landscape of the US (the entire 50 States). The NGS was the first systematic study of its type and magnitude attempted by the USGS with a parallel effort to map North America collaboratively with Mexico and Canada. The survey’s scope provides data for over 60 analytes, and extend[s] to the Atlantic, Gulf of Mexico Coastal Plain Province and adjacent Continental Shelf, Alaska, Hawaii, and the...
