STRUCTURAL FEATURES OF THE PRE-CAMBRIAN 



67 



generalized conception as he endeavors to present is of value, even 

 if not wholly correct. In the words of Van Hise:' "The attempt 

 to give a generalization .... sharpens the wits and makes the 

 geologist think of relations which were not before observed 



JOO 



2.0O 



300 



■400 500 



Fig. I. Work done since 1908 in northern Ontario and Quebec. Dotted areas 

 covered by reconnaissance methods; hatched area, by detailed methods. 



He has an hypothesis or hypotheses which he is either to verify 

 or disprove, and consequently will work with greater keenness and 

 insight." 



PREVIOUS WORK AND CORRELATION 



The northern Quebec region has long been known, and a consid- 

 erable amount of geographic and geologic work has been done in it 



'Van Hise, "Principles of North American Pre-Cambrian Geology," U.S. Geol. 

 Siirv., Ann. Kept., XVI, 742. 



