6.0        GEOCHEMICAL DATASET FIGURES

FIGURE INDEX:
· 6.1 General Figures for New England Study Area
· 6.2 NURE Water Chemistry Figures
· 6.3 Stream Sediment Chemistry Figures
· 6.4 Stream Sediment Factor Analysis Figures

* Printable .pdf formats provided here.

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6.1 General Figures for New England Study Area

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MAPS:
· NURE water samples
· Stream sediment samples
· Geologic provinces
    Sample counts
· Bedrock lithology
    Sample counts
· Hydrologic basins
    Sample counts
· Population density

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6.2 NURE Water Chemistry (Alkalinity, pH, Specific Conductance)

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MAPS:
· Universal Kriging Interpolation
    Interpolation Uncertainty
· Multifractal IDW Interpolation
    Interpolation Uncertainty
· Bedrock Lithology -- water chemistry median-values
· Hydrologic Basins -- water chemistry median-values
· Population Density -- water chemistry median-values

BOX-PLOTS:
· Box-plots by geologic province
· Box-plots by bedrock lithology
· Box-plots by population density

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6.3 Stream Sediment Chemistry (Major oxides and trace elements)

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MAPS:
· Universal Kriging Interpolation (with geologic province overlay):
    Major elements (and QQ plots)
    Trace elements (and QQ plots)
    Interpolation Uncertainty (all elements)
· Multifractal IDW Interpolation (with geologic province overlay):
    Major elements (and QQ plots)
    Trace elements (and QQ plots)
    Interpolation Uncertainty (all elements)
· Bedrock Lithology -- stream sediment chemistry median-values:
    Major elements
    Trace elements
· Hydrologic Basins -- stream sediment chemistry median-values:
    Major elements
    Trace elements
· Population Density -- stream sediment chemistry median-values:
    Cu, Pb, Hg, Zn by population density

BOX-PLOTS:
Box-plots by geologic province:
    Major elements
    Trace elements
Box-plots by bedrock lithology:
    Major elements
    Trace elements
Box-plots by population density for Cu, Pb, Hg, and Zn

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6.4 Stream Sediment Factor Analysis (Metal and Major Factors)

MAPS:
· Universal Kriging Interpolation
· Multifractal IDW Interpolation
· Bedrock Lithology -- factor analysis median-values
· Hyrdologic Basins -- factor analysis median-values
· Population Density -- factor analysis median-values

BOX-PLOTS:
· Box-plots by geologic province
· Box-plots by bedrock lithology
· Box-plots by population density

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Direct questions and comments to:
Gilpin R. Robinson
U.S. Geological Survey
Email grobinso@usgs.gov 
Phone (703)-648-6113