48 J GEOLOGICAL SURVEY OP CANADA. 



apparently horizontal. On the portage past the fifteen-feet chute the- 

 same rocks were seen dipping S. < 70°. 



At the rapids, three miles and three-quarters above, the rock is a 

 fine-grained, grey hornblende-gneiss. Strike N. 40° W. 



On the portage at the forty-feet chute are exposures of highly con- 

 torted, pink and grey, fine-grained hornblende-gneiss. 



At the twenty-feet chute similar rocks were seen. 



A micaceous hornblendic-gneiss, greyish-green in color, along with 

 pink bands of the same, holding segregations of hornblende and cut by 

 veins of pink orthoclase, occur at the thirty-feet chute. Beyond this, 

 to Patitawagan Eiver, no rock exposures are seen in the river valley. 



Portage Route from Big River to the South Branch of Great Whale River. 



Description of Leaving the Big River by the Patitawagan. Eiver, the route passes 

 up that crooked stream in a general north-west course for fifty chains 

 to a portage of half a-mile over a sandy plateau, sixty feet above the 

 river valley, past a shallow rapid. Thence the winding course of the 

 river is again followed two miles and three-quarter, past small rapids, 

 causing portages of four, thirty-six and twenty-seven chains, to a small 

 lake called Ka-wa-cha-ga-mi-chits. The river winds through a valley 

 half a mile broad, cut out of stratified sands, on the lower parts 

 showing cut faces sixty feet high. As the rate of fall of the river is 

 heavy, these consequently become lower as the stream is ascended, 

 until, near the lake, they have disappeared, giving place to rocky 

 hills, partly covered with a thin layer of boulder-clay. 



Lake Kawachagamichits is two. miles long, with an average breadth 

 of half a-mile. It is separated from another small lake forty-five 

 chains long by a portage of six chains, with* a similar portage at its 

 upper end to A-che-wa-ma-ni-ka Lake, out of which the Patitawagan 

 Eiver rises. This last lake is two miles and a-half long, with an aver- 

 age breadth of one-quarter of a mile, and is very deep. The waters of 

 these lakes and the following ones are remarkably clear and cold, and 

 are plentifully stocked with large white fish, lake and river trout, 

 pickerel and suckers. The next portage is fifteen chains long, and 

 forms the watershed between Big Eiver and the north branch of 

 Bishop Eoggan Eiver. The course, in a straight line from the mouth of 

 the Patitawagan Eiver to the height of land, is N. 50" W. 



Character of The country about the lakes is very similar to that described on the 

 south branch of the Bishop Eoggan Eiver ; it is made up of low round- 

 ed ridges of hills, rising from fifty to two hundred feet above the 

 water level, with the intervening valleys covered with small lakes or 

 mossy swamps. Everywhere are immense quantities of rounded 



country. 



