i88 The Ottawa Naturalist. [January 



the numerous islets which here occupy the channel, and this line 

 of disturbance continues through the western portion of Hull. 

 Along the Creek in the Beaver meadow, north of this place, a 

 number of outcrops of Trenton limestone appear which are tilted 

 at a moderately high angle, and this line of disturbance con- 

 tinues to the head of the Fairy Lake, where several faults are 

 evident Thus, on the east side of the lake, strata of the Chazy 

 shales, the Black River limestones and the Trenton can all be 

 seen, while on the west side, descending the escarpment, not far 

 from the south-west angle of the lake, tilted beds of Trenton are 

 again exposed. These rest upon the Black River beds which 

 can be followed thence to Tetreauville. 



Along the river in front of the city, several small faults can 

 be observed. One of these is to the west of the bluff on which 

 the Parliament Buildings are placed, but this affects the beds of 

 the Trenton only. At the end of Nepean point also, there is a 

 small local area of disturbance in the usually horizontal strata 

 of this place, but the displacem'snt is apparently only slight. The 

 faulted character of the beds between New Edinburgh and 

 Rockliffe where the disturbances affect the Chazy and the Tren- 

 ton has already been referred to. 



In the area to the south of Clarkstown, near the entrance 

 to Beechwood cemetery, a well defined fault can be seen near 

 the angle of the road opposite the greenhouse. This fault brings 

 the Utica shales against the Chazy, and is probably one of the 

 most extensive in the Ottawa basin, as the Trenton and Black 

 River formations have both disappeared. 



One of the most interesting places at which one may readily 

 study the Palaeozoic formations of this district and also within 

 easy reach of the city, is at the village of Rockland, about thirty 

 miles down the river. At this place the whole series from the 

 Laurcntian to the Trenton can be well seen within the space of 

 a couple of miles. The Archaean shews in a small outcrop in 

 the vicinity of the steam mills near the wharf, and is there covered 

 over by the basal or arkose beds of the Potsdam sandstone. 



