Trace Element Box-plots: 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 (others):

             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