io5 



places thickly studded with garnets and they may 

 then be referred to as garnet schists. These 

 schists are often intricately contorted, and are 

 similar to certain schists in Eastern Ontario 

 which are commonly classed with the Grenville 

 series. 

 io.i m. Between mileage i (1.6 km.) and mileage 



16.3 km. io.i (16.3 km.) the gneisses are much covered 

 with superficial deposits, but pink, grey and 

 brown types were noted, holding few dark 

 bands. 



What may be referred to as the Mulock 

 gneiss occurs in the area about Mulock station, 



18.0 m. altitude 1,222 ft. (372.6 m.). It is a coarse- 



29.1 km. grained, pink biotite variety in places having a 



marked '" augen " texture. This gneiss lacks 

 the striking banding of the rocks at North Bay. 

 Pink, light-colored gneisses with subordinate 

 areas of the dark banded types occur between 

 27. m. mileage 21.5 and Tomiko, altitude 1,167 ft. 

 43.6km. ^355-9 m.). On the other hand the country 

 between Tomiko and mileage 35 is underlain 

 35. m. by a banded, dark, glistening biotite gneiss, in 

 56.5 km. which pink gneiss is subordinate in amount. 

 47. m. For the next twelve miles, as far as the 



75.6km. station of Bushnell, altitude 996 ft. (303.5 m.), 

 the rocks are poorly exposed, the last seven miles 

 being covered by " muskeg." 

 56. m. Between Bushnell and Redwater, altitude 



90. km. 1,015 (309.3 m.), a dark biotite gneiss first pre- 

 dominates ; as Redwater is approached the dark 

 bands become hornblendic and chloritic, one 

 small lense held by the pink gneiss consisting 

 largely of chlorite. This latter resembles a 

 fragment of Keewatin greenstone schist. Both 

 pink and dark gneisses are injected by granite 

 pegmatites, cutting across or parallel with the 

 bands. 



A variety of granitic rocks occurs between 



64. m. Redwater and Doherty, altitude 1,063 ft- (324 



103. km. m.). Thus, for the first three miles north of 



Redwater pink gneisses predominate holding 



