NORTH AMERICAN GEOLOGY. 



49 



Archean and Algonkian — Contimied. 

 Great Lake Region' — Continued. 



1849. Statistics of Keweenaw Point, 



Foster and Hill. 



North shore of Lake Huron, 

 Logan. 



Reconnaissance from Sugar 

 Island to Sault Ste. Marie, 

 Channing. 



Explorations in Lake Superior 

 district, Foster and Whitney, 

 Hubbard, Foster, Burt. 



Mineral lands in Michigan, 

 Jackson, C. T. 



Isle Royal, Diokerson. 



Features of part of Keweenaw 

 Point, Barnes, G. O. 



District between Portage Lake 

 and the Ontonagon, W h i t - 

 ney, 



Ontonagon district, Barnes, 

 G.O. 



Douglass Houghton location, 

 Gibbs. 



Geology and topography of dis- 

 trict on Lake Superior, Hub- 

 bard, B. 



Report on northern peninsnla of 

 Michigan, Whitney, J. D. 



Survey of districts on Lake Su- 

 perior, Burt. 



Specimens and field notes, sur- 

 veys in Michigan, Locke. 



Notes on northern peninsula 

 and Isle Royal, Foster, J. W. 



Report on Isle Royal, Macln- 

 tyre. 



1850. Lake Superior, Agassiz, L. 

 Geology of copper lands of 



Lake Superior, Foster and 

 Whitney. 



Geology of Lake Superior cop- 

 per district, Foster and Whit- 

 ney. 



Geologic du district m^tallif fere 

 da lao Sup^rienr, Jacks>>n, 

 C.T. 



Territory of the Minnesota, 

 Pope, John. 



Mineral region of Lake Supe- 

 rior, Hodge, J. T. 



Structure of Keweenaw Point, 

 Jackson, C. T. 



1851. Ueber Kupfer und Eisenerzs am 



Lake Superior, Koch. 



Bull. 127 4 



Archean and Algonkian — Continued. 

 Great Lake Region — Continued. 



1851. Systems of elevation of North 



America, Foster and Whit- 

 ney. 



Geology of Lake Superior land 

 district iron region, Foster 

 and Whitney. 



Azoic system in Lake Superior 

 district, Foster and Whitney. 



Kupfer mein, Michigan, Miiller. 



Age of sandstone and igneous 

 phenomena. Lake Superior, 

 Foster and Whitney. 



Terrains siluriens da lac Sap6- 

 rieur, Foster and Whitney, 

 Marcou, J. 



Section from Wolf River to 

 Lake Michigan, Whittlesey. 



Analysis of porphyry from Isle 

 Royal, Jackson, C. T. 



Age of copper rocks of Lake 

 Superior and physical struc- 

 ture of Canada, Logan. 



Introduction to report on Wis- 

 consin, Iowa, and Minnesota, 

 Owen, D. D. 



1852. Survey of Wisconsin, Iowa, 



Minnesota, etc., Owen, D. D. 



Observations on magnetism, 

 Locke. 



Report on Pigeon Point, 

 Owen, R. 



Geography, geology, and re- 

 sources of Lake Superior, 

 Bigsby. 



Age of copper rocks of lakes Su- 

 perior and Huron, and struc- 

 ture of Canada, Logan. 



Wisconsin south of Lake Supe- 

 rior, Whittlesey. 



Report on trade of the Great 

 Lakes and rivers, Jackson, 

 C. T. 



Geology of Late of the Woods, 

 Bigsby. 



Geology of middle and western 

 Minnesota, Norwood. 



Sur la carte g^ologique du lao 

 Sup^rieur de Foster et Whit- 

 ing, Desor. 



1853. Rocks from Red River region in 



Louisiana, Hitchcock. E. 

 Geologic map of United States, 

 etc., Marcou, J. 



