24 The Ottawa Naturalist. [April 



for a height of nearly 500 feet. The southern shore of the river 

 for several miles above High View is a rocky ridge which divides 

 the Deep River channel from a" long chain of lakes which starts 

 from the south shore ot the Ottawa about ten miles west of High 

 View and cuts across to a point about three miles south of High 

 View point. The surface of the country around this chain of lakes 

 is heavily sand covered and these deposits extend south towards 

 Chalk River. The lakes evidently indicate a former channel 

 of the Ottawa which became choked up by sand subsequent 

 to the glacial period. 



The shore of the river opposite High View is indented by 

 bays. The north shore of the main stream east from Oiseau rock 

 continues in a bold range of hills for some miles eastward, and an 

 old channel apparently followed a straight course from the deep 

 bay eastward from High View. This channel evidently became 

 choked up by great deposits of sand and gravel, thus diverting the 

 stream past the east end of what is now known as the township of 

 Buchanan, southward. The old channel thus blocked extended 

 across the southern part of the townships of Sheen and Chichester, 

 and probably reached the Culbute channel of the the Ottawa which 

 flows along the north side of Allumette Island, below the Culbute 

 Fall. 



On both sides of the river opposite this place and for some 

 miles to the ea-t and west, the surface is covered with great de- 

 posits of sand and gravel, many feet in depth. In that part of the 

 township of Chichester, north of the village of Chapeau, these sand 

 ridges are well defined, continuing for several miles till they reach 

 the foot of a bold ridge of granite and gneiss. This ridge is con- 

 tinuous from the foot of Deep River to the mouth of Rouge River 

 about sixty miles below Ottawa city, and at one time undoubtedly 

 formed the the north shore of the Ottawa River for this portion 

 of its original course. 



A great part of Allumette Island is occupied by these reddish 

 granite sands. They form extensive ridges along the centre of the 

 Island from east to west and they were at one time doubtless con- 

 tinuous with the broad areas north of the Culbute channel through 

 which that channel has since been cut. The upper end of this channel 

 for some miles is narrow and rocky, but the portion below the 



