Factor Analysis: Stream sediment chemistry median-value maps by bedrock lithology:

Back to Figure Index

Back to Home

(Click on image for larger view:)

Metal Factors:  

            Factor 1 [Fe₂O₃, Cu, Zn]:                        Factor 2 [As, Pb]:

Major Element Factors:

Factor 1 [Fe₂O₃, MgO, CaO]         Factor 2 [K₂O, Al₂O₃]            Factor 3 [Na₂O, CaO]

Back to Figure Index

Back to Home

Direct questions and comments to:

Gilpin R. Robinson

U.S. Geological Survey

Email grobinso@usgs.gov 

Phone (703)-648-6113