﻿140 REIN-DEER ISLANDS. July, 



of hornblende and quartz in about equal quan- 

 tities, imbedded in a snow-white powdery basis, 

 which appears to be disintegrated felspar. 



A mile below the Stony Islands we passed the 

 smaller Balsam Fir Island, below which there is 

 a pretty little bute on the left, where the purplish- 

 coloured rock that protruded appeared to us in 

 passing to be amygdaloid or porphyritic trap rock. 

 Some miles further down we entered among the 

 rather high and rocky cluster of the Rein- deer 

 Islands {Isles de Carreboeuf) by a channel having 

 a north-north-west direction. The rocks here ap- 

 peared to us as we shot past them to be principally 

 trap, associated with gneiss, or perhaps chlorite- 

 slate. A point on the main shore, on which I 

 landed in 1820, is composed of felspar and quartz, 

 and is probably a variety of granite. 



A short way further down the Great Balsam Fir 

 Island {La grand Isle des Epinettes), which is a 

 mile across and three or four long, has a triangular 

 form, and divides the river into two channels. 

 We descended the easternmost, or right-hand one, 

 which is the most direct, and has a high and sandy 

 eastern bank. 



Below this a bend of the river is filled with 

 many rocky islands, occasioning numerous rapids 

 and cascades, and seven or eight portages. The 

 river expands here to the width of a mile and a 



