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NEW YORK STATE MUSEUM 



This is more likely due, however, to the failure of the zone to crop 

 out, rather than to its total absence, because this same relationship 



of the Canton village 



can be observed again half a mile north 



a 





b 





c 





d 





e 























Fig. 5 Upper granite contact against Grenville gneisses, which are shown 

 to be progressively metamorphosed to amphibolite. (a) Garnetiferous gneiss 

 cut by abundant quartz stringers; (Z?) purplish biotitic schist, about 15 feet 

 thick; (c) hornblende schist, grading into feldspathic amphibolite; (d) pink 

 granite gneiss containing few, if any, black inclusions; (^) surficial covering. 



Five-tenths of a mile north-northeast of Canton village line. 



line. The association is practically identical with that observed at 

 the other localities (see figure 5). On going westward from the 

 road, a few inconspicuous roches moutonnees of normal pink 

 granite gneiss are succeeded after a short interval by an overlying 

 hornblende schist, which at times is almost dioritic in character, 

 and is cut by numerous gray pegmatite veins carrying tourmaline 

 and garnet. Next follow about 15 feet of purplish biotitic schist 

 and garnet gneiss, the former injected at the base by pink granitic 

 material, and the latter cut parallel to its schistosity by abundant 

 quartz stringers. 



It would thus seem possible to account for the unique peripheral 

 association, in the three cases cited, as a phase of contact action by 

 the granite similar to that exerted in the Haliburton-Bancroft area. 

 In the present area, however, though the end-product is the same, 

 the country rock is sometimes a micaceous schist instead of a lime- 

 stone, and the dominant transition rock is a garnet-bearing amphi- 

 bolite instead of pyroxene-scapolite gneiss. The writer has been able 

 to observe no data in this quadrangle independently confirming the 

 process suggested by Adams and Barlow to account for such contact 

 action, and the interpretation offered above is based on the assumed 

 adequacy of the transfusion hypothesis in its present application, 

 where the presence of micaceous schists is an important factor in 

 the case. 



The third division of the areal classification of garnet gneisses 

 mentioned on page 24, namely, the sigmoidal belt of rock occupying 

 the southeast corner of the sheet, belongs neither to the obviously 



