APR 10 1917 



THE OTTAWA NATURALIST. 



Vol. XI. OTTAWA, MARCH, 1898. No. 12. 



NOTES ON THE PLEISTOCENE GEOLOGY OF A 

 FEW PLACES IN THE OTTAWA VALLEY. 



By W. J. Wilson, Ph. B., 

 Of the Geological Survey of Canada. 



The Ottawa River rises near the height of land in Latitude 

 48° N. and Longitude 76° W., whence it flows westwardly for a 

 distance ot 250 miles to Lake Temiscaming. From this lake its 

 course is south-east till it reaches the St. Lawrence River. Its 

 whole length is about 650 miles, but from its source to the St. 

 Lawrence River in a direct line is less than 200 miles. Its 

 branches on the north or Quebec side are the Dumoine, Black, 

 Coulonge, Gatineau, Lievre, and Rouge, all of which flow nearly 

 south. From the west or Ontario side it receives the waters of the 

 Montreal, Mattawa, Petewawa, Bonnechere, Madawaska, Missi- 

 sippi, Rideau, and South Nation, all of which flow eastward. 

 The whole area drained by the Ottawa is approximately nfty-six 

 thousand square miles. 



It is the purpose of this paper to record the result of obser- 

 vations made at a few points extending from the city of Ottawa 

 to Pembroke, a distance of eighty miles, during the summers of 

 1895-96, more especially the district included in the townships 

 of Ross, Westmeath, Stafford, Wilberforce, Bromley, S. Algona, 

 Sebastopol and Grattan, in Renfrew county. 



Everywhere in this district there is abundant evidence of 

 ice action, both in the polished and striated rocks and in the 

 general distribution of boulder-clay and boulders. The question 

 of the direction of the ice movement is comparatively simple. 

 Near the Ottawa River the striae follow closely the course of the 



