Major Element Box-plots: Stream sediment chemistry median-values by bedrock lithology:

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           Al₂O₃                          CaO                         Fe₂O₃                              K₂O

           MgO                          Na₂O                            SiO₂                            TiO₂

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Direct questions and comments to:

Gilpin R. Robinson

U.S. Geological Survey

Email grobinso@usgs.gov 

Phone (703)-648-6113