THE PRECAMBRIAN ROCKS OF THE CANTON QUADRANGLE 99 



granite. Having followed the course of the amphibolite bands 

 from their first appearance, one is surprised to find them at this 

 point passing with extreme abruptness from a position nearly 

 normal to the schistosity to one parallel to it; all of which is 

 accomplished through the gradual appearance and sudden cul- 

 mination of a system of transverse crenulations. At the latest 

 stage in the process, the tightly compressed xenoliths have a 

 second direction of elongation down the foliation plane at an angle 

 of 15 or 20 degrees with the dip. This direction is the pitch of the 







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n"' 









's< 



1/// 



/ 



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\! / 



H> 



|N' / 



-^ 







~ K 





n' 







1 ^ 



'/^ 



^ /. 



— \ ^ 



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d 



Fig. 22 Tucking up and transverse crenulation of the end of a stratum 

 of garnet gneiss. Secondary folding is north by east, parallel to the average 

 strike of the sedimentary strip, and to the foliation of the adjoining and 

 nearly surrounding granite gneiss, (a) Limestone; (6) tightly folded garnet 

 gneiss; (c) granite gneiss; (rf) surficial covering. Tight folding largely 

 diagrammatic. 



Four miles south of Canton, back of house at three-corners. 



folds, and is moreover parallel to the axes which control the coarser 

 folding of the garnet gneiss in the adjacent vicinity of Little River, 

 as well as that of the Pierrepont vicinity. 



Another instance of the extreme amount of squeezing which this 

 portion of the quadrangle has suffered as a result of compression 

 acting in a northwest-southeast direction, occurs within this same 



7 



