[BLLs] PALA<]OZOIC OUTLIERS IN THE OTTAWA RIVER BASIN 147 



upper lionncchèrc outliers is seen with ;i breaiitli of rnoi-e than u mile 

 resting- upon (he Laurentian gneiss. 



Owing, however, to the very considerable extent of the drift deposits 

 over much of this country, it is obviously very ditticult to determine with 

 accuracy the limits of these outcrops, since large areas are covered with 

 blocks of the Black Eiver foi"mation, which rest presumably in many 

 cases upon the underlying gneiss and granite. 



On the line of the Ottawa, Arnpi-ior and Parry Sound railway, about 

 three miles west of the station of Killaloe, which is near the southwest 

 angle of Golden Lake, a small outlier of grayish sandy-looking limestone, 

 possibly à part of the Chazy formation, has been cut through. The 

 exposed outcrop is only a few hundred yards in extent lying among the 

 hills of gneiss and granite. The elevation of the spot on the railwav was 

 not ascertained, but is not far from 750 feet. 



To the south of this, on the southwest portion of Clear Lake, deposits 

 of Trenton limestone are overlaid near the shore b}^ typical Utica shales 

 containing fossils characteristic of that formation. The elevation of 

 Clear Lake is 745 feet above the sea, and this is the oui}- observed out- 

 crop of the Utica west of the city of Ottawa. Its elevation above the 

 lake is about one hundred feet, but on the road which extends along the 

 mountain at a further height of 500 feet or about 1,350 feet above the 

 sea, great quantities of large blocks of the Black River limestone are 

 scattered about. These do not, however, represent an outlier in place. 

 the present position of the blocks being evidently due to ice action in 

 some form. On the Opeongo road, however, about five miles east of this 

 place, a large outlier of the Black Eiver formation is seen. 



In the vicinity of Calabogie Lake, which has an elevation of 503 feet, 

 outliers of Chazy and Black River rocks occur, both on the north and 

 south side. The exposed outcrops are but small, much of the area being- 

 drift covered. Chazy blocks are also numerous on the Opeongo road 

 about eight miles west of Renfrew-, indicating a possible outlier of the 

 formation in this direction. To the southwest of Clear Lake in the 

 township of Lyndoch, an outlier of Silurian rock was also discovered by Dr. 

 F. D. Adams in 1894. This is not far from the Madawaska River, but in 

 the absence of fossils from this locality, its exact horizon cannot yet be 

 stated.' 



On the upper Ottawa an interesting outlier is seen on both sides of 

 the river, at Deux Rivières, about twenty miles below the mouth of the 

 Mattawa. The exposure is seen along the stream for about three miles 

 and consists for the most part of an impure limestone, Avhich becomes 

 more sandy in its lower portion. It is a buff gray in colour, and suffi- 

 ciently siliceous to be used for grindstones. Throughout the entire 

 thickness of the outlier orthoceratites and other fossils occur which fix its 

 horizon as that of the Black River formation, though in lithological char- 



