FOLDING OF THE AJIBIK QUAKTZITE. 285 



FOLDING. 



The topoo-raphic features and the exposures are eh)sely dependent 

 upon the foldino- to which the (juartzite has been sul)jected. Beginning- 

 south of Goose Lake, the quartzite constitutes an eastward-plunging anticUne 

 over the Wewe slate in sec. 23 (Atlas Sheet XXXV). To the north this 

 anticline is quickly followed by a syncline, so that the" section from north 

 to south includes a southern anticline and a northern syncline. Following 

 the belt westward, the formation constitutes the southward slope of an 

 anticline, the crown of which is to the north in the area of the Wewe slate 

 and Archean islands. The l)elt is continuous to sec. 28, T. 47 N., R. 2(3 W. 

 (Atlas Sheet XXXII), where, still constituting one side of an anticline, it 

 swing's northwest and then north. The westward-projecting arm, which 

 runs into the NW.J sec. 28 and the NE.^ sec. 29, is due to a subordinate 

 anticline which springs up on the slope of the main anticline. The greater 

 breadth of the formation in sec. 28 is due to this same cause. The west- 

 ward-projecting- arm is a westward-plunging anticline, so that the quartzite 

 soon disappears under higher formations. In the center of this anticline a 

 small area of Archean appears. The main belt of the formation (Atlas 

 Sheet IX) swings to the northward, thence northeast, thence east to Carp 

 River, and thence north and west to Teal Lake. This main belt is thus a 

 part of the great westward-plunging syncline of the eastern halt of the 

 district, dipping ti^ the north along its southern arm, to the south along 

 its northern arm, and to the west at the eastern end of the syncline. 



West of Teal Lake (Atlas Sheet XXVII) the regularly bedded, typical 

 quartzite in the lower horizons is found to be somewhat plicated, then 

 more phcated, and finally very closely plicated into a series of minor cross 

 folds, with axes plunging sharply to the south, following the general dip 

 of the formation. 



In sees. 30 and 31, T. 48 N., R. 28 W., and in sec. 25, T. 48 N., R. 29 W., 

 the quartzite swings to the north, and here the characteristic folding of the 

 district is well illustrated (Atlas Sheets XV and XVIII). The formation is 

 infolded in the most complicated fashion with the granite and gneiss of the 

 Archean, the whole being a set of isoclinal overfolds with southern dips. The 



