Vol. s3-3, Issue 18, 1872June 01, 1872 EDT
On the Age of the Copper-Bearing Rocks of Lake Superior
On the Age of the Copper-Bearing Rocks of Lake Superior
Thomas Benton Brooks, R. Pumpelly,
Brooks, T. B., & Pumpelly, R. (1872). On the age of the copper-bearing rocks of Lake Superior. American Journal of Science, s3-3(18), 428–432. https://doi.org/10.2475/ajs.s3-3.18.428