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Information about methods of analysis for Silicon (Si) in the NGS

      Distribution maps  
      (Click on thumbnail to enlarge)  
Method Quality Notes Lower 48 Alaska Hawai`i Statistics
ICP16Very good Show field values mapped on the conterminous (lower 48) states  Show statistics for this field
XRFExcellent Show field values mapped on the conterminous (lower 48) states  Show statistics for this field