THE 



CANADIAN 



NATURALIST AID GEOLOGIST. 



Volume II. MARCH, 1857. Number 1. 



ARTICLE I. — On the Geological 'Structure and Mineral De20osits 

 of the Promontory of Maimanse, Lake Superior. 



BY J. "W, DAWSON, A. M., F. G. S. 

 (read before the natural history society of MONTREAL, FEB. 10, 1857.) 



The Copper Districts of Lak^ Suj)erior have been so frequently- 

 explored and described, that little interest may attach in the minds 

 of many to the subject of this pa^^er. I have selected it, because 

 the locality referred to, though shortly noticed in the Reports of 

 the Canadian Survey, has not hitherto attracted any very large 

 share of attention, and. in the hope that to a new observer even 

 tt. • -atures common to this and the better known copper dis- 

 tricts of the region, may have presented themselves in some new 

 aspects. , 



On the North Shore of Lake Superior, the geologist observes 

 between Sault St. Marie and Maimanse, portions of the three old- 

 est formations in America or in the world. 



