Bedrock soil and lichen geochemistry from Isle Royale National Park, Michigan

Online link http://pubs.usgs.gov/of/2003/of03-276/
Description Geochemical analyses conducted as part of a larger study of the Midcontinent Rift in the Lake Superior region.
Originators Woodruff, Laurel G.; Cannon, William F.; Dicken, Connie L.; Bennett, James P.; and Nicholson, Suzanne W.
Publication U.S. Geological Survey Open-File Report 03-276

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Map showing soil and lichen sampling localities
Map showing soil and lichen sampling localities
Additional images
Map showing sampling locations for bedrock and native copper mines
https://pubs.usgs.gov/of/2003/of03-276/ofr_03_276_figure2.jpg