1898] Pleistocene Geology in Ottawa Valley. 217 



ridges rising on each side fifty to one hundred feet, and just 

 where one would expect to find a cut terrace, but none were 

 seen that could safely be put down' as such. On the north-west 

 side of Lake Dore there is a well defined gravel terrace at a 

 height of four hundred and fifty feet above sea level and forty 

 feet above the level of the lake. 



A few sand and gravel ridges occur in this district, though 

 none of any great length were seen. Two small ridges 

 occur in Westmeath township. They are composed, largely of 

 sand and gravel, and are ten to fifteen feet high. They lie about 

 S. 30^ E. Another low ridge was seen near C'aldwell Station 

 on the Ottawa, Arnprior and Parry Sound Railway, though 

 the material in this one is more of the character of boulder clay. 

 On the road between Concessions XXI and XXII, Lot 12, 

 Wilberforce township, just east of the stream from Green Lake 

 there are four ridges running parallel to each other, course S- 

 23° E. The first is only a few rods from the stream which cuts 

 through it south of the road. In this part it is very regular in 

 shape and rises about twenty feet above the surrounding ground. 

 Where the road cuts through it, it is about two hundred and 

 twenty-five feet wide, flanked on each side by a low ridge four 

 or five feet high The sides are steep and meet in a sharp ridge 

 at the top, Between the first and second ridges there is a peat 

 bog two hundred feet wide. The 'second ridge is about the 

 same size as the first, then another narrow bog, and the third 

 crosses the road. It is similar to the other two only not quite 

 as high. A short distance from this is a fourth ridge, but it is 

 low and rounded at the top. A good section is shown in each 

 where the road crosses. They are composed of well rounded 

 water-worn pebbles, sand and gravel and a few angular frag- 

 ments of rock, but the second one mentioned differs considerably 

 from the others. A section in descending order is — rounded 

 pebbles, sand and gravel, five feet ; fine sand well stratified 



