GEOLOGY 203 



The Huronian rocks of Labrador are marked by the number 

 of repetitions of the strata caused by thrust faults in all the 

 areas examined, and this repetition of measures by similar 

 faults may account for the number of bands of limestone found 

 in the southern part of Baffin island. 



The crystalline rocks appear to form the southwest coast of 

 Baffin island for some distance beyond King cape on the east 

 side of Fox channel, when they give place to a wide area of low 

 lands extending nearly to the head of Fox channel, where the 

 crystalline rocks again form the higher lands to the north and 

 east of Fury and Hecla strait. 



On the late voyage of the Neptune the rocks of the east side 

 of Baffin island were examined at Ponds inlet, on the islands 

 on both sides of Cumberland gulf, and at Cape Haven and 

 Frenchmans cove on Cyrus Field bay. In other places the ship 

 passed sufficiently near the shores to allow of a good idea being 

 formed of the rocks by the aid of powerful glasses. 



Examinations of the rocks were made at Button point, the 

 southeast part of Bylot island, on the north side of the entrance 

 to Ponds inlet ; also in the vicinity of Salmon river some thirty 

 miles up the inlet and on its south side, and at Erik harbour on 

 the same side near the mouth of the inlet. At all these places 

 typical Laurentian gneisses and schists were obtained. Among 

 the specimens brought home from these localities is a light- 

 coloured coarse-grained augen-gneiss consisting largely of white 

 and pink feldspar, with thin bands of biotite and little quartz. 

 Another seeming variety of this rock is a well-banded fine- 

 grained mica-gneiss composed of pink and white bands of felds- 

 par separated by thin bands of mica. Associated with these 

 are bands of very quartzose gneiss varying in colour from light 

 to dark from the varying proportions of mica present. These 

 gneisses are usually found containing a considerable number of 

 dark-red garnets; and they probably represent a metamorphic 



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