Trace Elements, by group: Stream sediment chemistry median-values by bedrock lithology:

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Alkaline earths:

                              Ba                                                                  Sr

First-row transition elements:

                                Sc                                                                     V

Heavy-mineral suite: (rare earths)

             Ce                                La                              Nd                          Ce/Yb(n)

Heavy-mineral suite: (other)

               Y                                Th                               U                                   Zr

Base and toxic metals:

               Cu                                          Pb                                             Zn

                 As                                        Hg

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Direct questions and comments to:

Gilpin R. Robinson

U.S. Geological Survey

Email grobinso@usgs.gov 

Phone (703)-648-6113