National Geochemical Atlas: The geochemical landscape of the conterminous United States derived from stream sediment and other solid sample media analyzed by the National Uranium Resource Evaluation (NURE) Program

A subset of the National Uranium Resource Evaluation (NURE)
Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) data
were used to produce a set of map images depicting the general
geochemistry of the conterminous US.
Approxiamately 260,000 samples from the continental US were
analyzed. These consisted of solid samples, including stream,
lake, pond, spring, and playa sediments, and soils. Data for
eleven elements were analyzed and included on this release of
the National Geochemical Atlas: Na, Ti, Fe, Cu, Zn, As, Ce, Hf,
Pb, Th, and U.