DABIOB.j 



NORTH AMERICAN GEOLOGY. 



55 



Archean and Algonkian — Continued. 

 Gkeat Lake Region — Continued. 



1883. History of Taconic and rela- 



tions of Taconian, Hunt. T. S. 



Rocks of north shore of Lake 

 Superior, Selwyn. 



Decayof rocks, Hunt, T. S. 



Copper rocks of Lake Supe- 

 rior, Irving, E. D. 



Lake Superior rocks, WincheU, 

 N.H. 



St. Ignace Island, Lake Supe- 

 rior, Robb. 



1884. Eozoic rocks of North America, 



Hunt, T. S. 



Observations along Canada Pa- 

 cific Railway, Dawson, J. W. 



Ozoic system and its subdivi- 

 sions, Whitney and Wads- 

 worth. 



Strengths of granite, Win- 

 cheU, N. H. 



Geology of Minnesota, Wiu- 

 chell and Upham. 



Descriptive sketch of western 

 Canada, Dawson, 6. M. 



Crystalline rocks of the North- 

 west, WincheU, N. H. 



Microscopic structure of build- 

 ings stones, MerriU, G. P. 



Report on work on Archean, 

 Irving, E. D. 



Iron region of northern Minne- 

 sota, Chester, A. H. 



Copper and iron districts of 

 Lake Superior, Wadsworth. 



Rock outcrops in central Min- 

 nesota, Upham. 



Ago of rocks of Mesabi and 

 Vermilion districts, Win- 

 cheU, N. H. 



Transition ftom copper series 

 to Potsdam, Wooster. 



Enlargements of feldspar in 

 Keweenawan sandstone. Van 

 Hise. 



Minnesota buUding stones, 

 WincheU, N. H. 



Michigan building stones. Con- 

 over. 



Wisconsin building stones, Con- 

 over. 



Relations of Keweenawan to 

 Eastern sandstone. Wads- 

 worth. 



Archean and Algonkian — Continued. 

 Great Lake Region —Continued. 



1884. Faramorphosis of pyroxene to 



hornblende, WiUiams, G. H. 



1885. Canadian Archean and Irish 



metamorphics, Kinahar,C. H. 

 Enlargement of fragments in 



certain roclis, Irving and Van 



Hise. 

 Junction of Eastern sandstone 



and Keweenawan series, 



Chamberlin and Irving. 

 Copper rocks of Lake Superior, 



Irving, E. D. ; Dana, J. D. ; 



Selwyn. 

 Notes on north shore of Lake 



Superior, Selwyn. 

 Report, Lake Superior division, 



Irving, R. D. 

 Progress of geology, 1883, Hunt, 



T.S. 

 Archean of the Northwest, 



Irving, R. D. 

 Map of the United States, 



McGee. 

 Origin of crystaUine rocks. 



Hunt, T. S. 

 Impression of pre-Cambrian of 



Canada, Blake, J. F. 

 Division du systeme ^ozoiqne, 



Hunt, T. S. 

 Deep well at Minneapolis, Win- 

 cheU, N. H. 

 Crystallines of Minnesota, Win- 

 cheU, N. H. 

 Vermilion iron ores, WincheU, 



N.H. 

 Reconnaissance into Pope 



County, Minn., WiucheU, N. H. 

 Divisibility of Archean in the 



Northwest, Irving, E. D. 

 Enlargements of hornblende 



fragments. Van Hise. 

 Deep weUs of Minnesota, Win- 

 cheU, N. H. 



1886. Origin of schists and iron ores 



of Lake Superior region, 

 Irving, E. D. 



Iron ores, Michigan and Wis- 

 consin, Putnam. 



Origin of Penokee-Gogebic se- 

 ries. Van Hise. 



Temperature observatious, 

 Lake Superior copper mines, 

 Wheeler, H. A. 



