104 REPORT OF THE SPECIAL COMMITTEE 



The following succession and nomenclature are recognized and 

 adopted : 



Cambrian — Upper sandstones, etc., of Lake Superior 



Unconformity 

 Pre-Cambrian 



Keweenawan (Nipigon) 1 

 Unconformity 



I Upper (Animikie) 

 Unconformity 

 Huronian x Middle 



Unconformity 

 \ Lower 

 Unconformity 

 Keewatin 



Eruptive contact 

 Laurentian 



Alphabetically signed by the committee as follows: 



Frank D. Adams, 

 Robert Bell, 

 A. C. Lane, 

 C. K. Leith, 

 W. G. Miller, 

 Charles R. Van Hise, 

 Special Committee for the Lake Superior Region. 



1 Dr. Lane dissents as to the position of the Keweenawan as follows : 



"The use of pre-Cambrian above does not imply unanimity in the committee 



with regard to the pre-Cambrian correlation of the Keweenawan — a topic the committee 



as such did not investigate." 



