1898] Ells — Formations, etc., of Ottawa Dlstrict. 181 



Edinburgh and the Chazy and Black River limestones are ap- 

 parently absent. East of Rockliffe, the Chazy shales extend 

 to Beechvvood, and thence continue along the south side of the 

 Ottawa for some miles, appearing occasionally as far east as 

 Point Fortune. At the South Nation River they are overlain, 

 one mile south of the Ottawa, by the limestones of Black River 

 age. The contact of these formations can also be well seen at 

 Besserer's, Rockland, Cumberland and at several other places in 

 this direction. A very small outcrop of the Chazy is also seen on 

 the north-east angle of Fairy Lake, which is at the head of the 

 Beaver meadow and about one mile north of Hull. This ex- 

 posure is limited and the rocks which are shaly, are cut off by a 

 well defined line of fault, separating them from the Black River 

 formation. No other true Chazy rocks were observed to the 

 east of the city of Ottawa. 



The Black River and Trenton formations which come next 

 in order, are well developed in the vicinity of Ottawa, but are 

 very considerably affected by faults in this district. The out- 

 crops of the former are not very numerous or extensive as com- 

 pared with some of the others, but the formation is found at a 

 number of points and is always characterized by its peculiar 

 fossils, especially as regards corals. To the west of Ottawa, the 

 Black River is seen at the Hog's Back and at the Experimental 

 farm, near the Director's house. The limestonesextend north to the 

 Ottawa River at the foot of the Little Chaudiere rapid, whence 

 they cross the river and appear in the village of Tetreauville. 

 JKt all these j>laces the Black River is separated by a fault from 

 the limestones of the Trenton. The outcrop of the formation 

 at Fairy Lake has already been referred to. The area at this 

 place is small ana there are two faults, one of which affects the 

 Black River and the Chazy, while the other separates the Black 

 River from the Trenton. A line drawn from the Hog's Back to 

 the head of Fairy Lake, with a course of north twenty degrees 



