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The copper deposits of Michigan

January 1, 1929

The copper district of Keweenaw Point, in the northern peninsula of Michigan, is the second largest producer of copper in the world.  The output of the district since 1845 has been more than 7,500,000,000 pounds and showed a rather steady and consistent increase from the beginning of production to the end of the World War in 1918, since which there has been a marked decrease.

Publication Year 1929
Title The copper deposits of Michigan
DOI 10.3133/pp144
Authors B.S. Butler, W. S. Burbank
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Professional Paper
Series Number 144
Index ID pp144
Record Source USGS Publications Warehouse