http://www.mindat.org/u-4006.html The mindat.org user blog written by Paul Brandes http://www.mindat.org/article.php/336/Early+Exploration+on+the+Keweenaw+Peninsula%2C+Michigan Tue, 27 May 2008 Published: Tue, 27 May 2008, Subject: Early Exploration on the Keweenaw Peninsula, Michigan http://www.mindat.org/article.php/255/Geology+of+the+Keweenaw+Peninsula%2C+Michigan Sun, 24 Feb 2008 Published: Sun, 24 Feb 2008, Subject: Geology of the Keweenaw Peninsula, Michigan