1898] Pleistocene Geology in Ottawa Valley. 219 



angular or sub-angular stones such as are seen in ordinary till. 

 Water-worn or stratified material was seen in it. Its approximate 

 height is five hundred feet above sea level, course nearly east 

 and west. Striae on road along side of ridge. Course S 7" E. 



In Hull there are several moraine-like ridges. One crosses 

 Bridge street about half a mile from the Ottawa River, and is a 

 mass of large limestone blocks mixed with a small quantity of 

 sand and gravel. It reaches a height of ten to twenty feet and 

 is three hundred feet wide. It lies in an east and west direc- 

 tion. It extends east of Bridge street a short distance and west 

 to the next street where there is a break, but about two hundred 

 feet to the north another ridge of similar character begins and 

 continues westward to Brewery Creek. Two short ridges strike 

 off from this at right angles to the south but extend only for 

 a short distance. A section is exposed along the south side of 

 the long ridges and clearly shows their composition. They are 

 made up of large, flat, angular blocks of limestone (some are ten, 

 feet long and nearly as wide), arranged in layers overlapping 

 each other and generally dipping south at different angles. This 

 feature is very noticeable in walking over the ridges and is also 

 seen in the lateral sections. On the surface no fine material 

 was observed, but down in the mass there is a small quantity of 

 water-worn gravel and stones, an occasional rounded boulder 

 from the Laurentian rocks occurs. As far a? observed these are 

 well rounded and smooth but not striated. 



The underlying limestone is polished and bears distinct 

 strise, course S. 60° E. Not more than one hundred and fifty 

 feet from the western and longest part of the ridge an almost 

 parallel ridge lies to the north. This is composed almost entirely 

 of well rounded Laurentian boulders, gneiss, granite, etc., with an 

 occasional flat limestone block. There are no opening^ in it, so 

 that it is impossible to say what it is like below the surface, but 

 judging from what can be seen there is more clay mixed with 

 the boulders than in the first mentioned, It is crescent shaped 



