184 The Ottawa Naturalist. [January 



which occupies much of the country thence to the Ottawa 

 In the western portion of the city proper, the Trenton is well 

 developed at many points. It constitutes the bold escarpment 

 at the west of Maria and Lisgar streets, and can be seen in the 

 cuttings along the line of the Ottawa and Parry Sound railway 

 in the direction of Hintonburg, Good outcrops are exposed 

 along the east side of the canal expansion on the road to the 

 Experimental Farm as also to the west of that depression on 

 the portion of the farm east of the fault which separates the 

 Trenton from the Black River. Along the line of the Parry 

 Sound railway a number of cuttings are seen in which the re- 

 lations of the Trenton to the Black River can be well studied, and 

 several instances of faulting are apparent. Some of these dis- 

 turbances are in the beds of the Trenton entirely, while others 

 affect the two formations. The strata at the contact dip at a 

 high angle, or from fifty to seventy degrees, with a course of 

 twenty to thirty north of west, magnetic. This is the same di- 

 rection as noted in Tetreauville on the north side of the Ottawai 

 as also at Fairy Lake, where the contact of the two formations 

 is similar, several faults being visible at both these places. 



To the north of Hull on the road to Chelsea, the Trenton 

 beds appear to overlap the other formations and the underlying 

 strata are not exposed in this section, though this may be due 

 to the great deposits of clay which cover so large an area west 

 of the Gatineau. East of this river, where the continuation of 

 this formation might naturally be looked for, the surface is also 

 clay-covered for miles, but the outcrops which occasionally ap- 

 pear at no great distance back from the Ottawa are of gneiss, 

 while at the mouth of the Wabassee Creek, three miles east of 

 Gatineau Point, the Calciferous and Potsdam come to the shore 

 of the river from the vicinity of Templeton station. There is 

 apparently a line of fault in the direction of the lower Gatineau 

 which separates the rocks of these two formations from the 



