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milion iron-bearing district of Minnesota. There is little dispute 

 as to the equivalence of the series in the two districts, but there 

 is dispute as to their correlation with the original Huronian series 

 of the north shore of Lake Huron, and thus as to their nomen- 

 clature. At the east end of the Vermilion district they have 

 been proven to underlie unconformably the Animikie series of 

 the Mesabi district and its eastward continuation to Thunder 

 Bay on Lake Superior, which has been correlated by Van Hise 

 and others with the Upper Huronian of the original Huronian 

 area, but which the Canadian geologists and others regard as 

 younger than the true Upper Huronian. As already noted, Van 

 Hise has in preparation a final monograph on Lake Superior 

 geology in which the position of the United States Geological 

 Survey with reference to the correlation of these series in the 

 light of recent work will be fully stated. 



Bain 1 describes the iron belt of Lake Nipigon, devoting his 

 attention mainly to economic and petrographic features. The 

 stratigraphical features are covered in the general report of 

 Coleman summarized on a previous page. 



Miller 2 describes the iron ores and associated rocks of the 

 area adjacent to Lake Temegami and of the Lake Wahnafutae 

 and Hutton areas to the west, all in the Nipissing district of 

 Ontario. The Temegami has been previously mapped and 

 reported upon by A. E. Barlow. 3 Miller's discussion of the 

 general geology of this area follows that of Barlow, with minor 

 additions and corrections. 



Winchell 4 publishes a geological atlas of the state of Minne- 

 sota with synoptical description of plates. This volume con- 

 tains maps and general conclusions found in Volumes IV and V 

 of the Minnesota Survey, summarized in this Journal, Vol. IX, 

 pp. 79-86. One additional map is published, a general geologi- 

 cal map of the state. 



^'The Iron Belt on Lake Nipigon," by J. W. Bain, Tenth Report of Bureau of 

 Mines, Ontario, 1901, pp. 212-14. 



2 "Iron Ores of Nipissing District," by Willet G.Miller, Tenth Report of the 

 Bureau of Mines, Ontario, 1901, pp. 160-80. 



3 Annual Report Geol. Survey of Canada, Vol. X, Part I, for 1897, pp. 302. Sum- 

 merized, Tour. Geol., Vol. VIII, 1900, pp. 439-4 1 - 



■* The Geological and Natural History Survey of Minnesota, Vol. VI, 1900-1. 





