Douglass Houghton
Douglass Houghton ( September 21 , 1809 – October 13 , 1845 ) was an American geologist and physician , primarily known for his exploration of the Keweenaw Peninsula of Michigan . 
<triplet> Douglass Houghton <subj> September 21, 1809 <obj> date of birth <subj> October 13, 1845 <obj> date of death <triplet> Keweenaw Peninsula <subj> Michigan <obj> located in the administrative territorial entity