34 Canadian Record of Science. 



molten mass itself. In reality this theory does not differ 

 greatly from the second. 



4. This is, in part, a combination of the three pre- 

 ceding. It has already been shown probable that the 

 movements which took place throughout this whole area 

 occurred during the recrystallization of the rocks. To 

 stretch this point somewhat, it is possible that many of 

 the fragments which now form the inclusions were broken 

 off and floated into the igneous mass after some meta- 

 morphic action had taken place at the contact. Thus, 

 instead of receiving fragments of practically unaltered 

 limestone on which to act, the magma had already had 

 part of its work done for it at its periphery, and thus the 

 final effect on these fragments would be much greater 

 than on the rock which remained at the periphery. 

 Further, if there were any difference in the influences 

 acting at the border, and within the mass, respectively, it 

 would make its effect manifest here. 



While it is at present impossible to decide even which 

 of these theories is the most probable, it may be that 

 with further study, one of them will be found sufficient 

 to account for the difference in character of the metamor- 

 phosed limestones at the contact of the intrusion, and 

 those fragments which have been included by it. 



In mentioning the possible causes of all these pheno- 

 mena, on a previous page, and having noted the intrusion 

 of new igneous material and the refusion of the 

 underlying Fundamental Gneiss as two of these, it was 

 stated that there is still a third explanation possible. 

 This is to be found in the views of certain of the French 

 geologists regarding the origin of granite intrusives and 

 their relations to the rocks penetrated. 



Michel-Levy l was one of the first of these to state it 

 as his belief that the origin of the so-called primitive 



1. "Sur l'origin der terrins crystalling primitifs," Bull. Soc. Geol. de France, 1887 

 Vol. III., p. 103. 



