1898] Ells— Formations, Etc., of Ottawa District. 189 



These pass upward in a few feet into the quartzose strata of 

 that formation which form a well outlined escarpment nearly 

 forty feet in hight, and these in turn are succeeded upward by 

 the calcareous portion of the Calciferous which forms another 

 escarpament. The Calciferous limestones occupy the greater 

 part of the village of Rockland and can be well seen along the 

 main road through this place. This formation is covered by the 

 Chazy shales in the flat area to the south, in the direction of the 

 Stewart quarries. The Chazy limestones are not so well seen 

 at this point, but the base of the steep escarpment, about one 

 mile south of the Ottawa, is occupied by the limestones of the 

 Black River while the Trenton beds occupy the upper portion of 

 the same escarpment. In this way we can very readily study 

 the peculiar features of the several formations and with very 

 little unnecessary gravelling. A paper on the geology of a part 

 of this district was read several years ago by Dr. Ami and the 

 relations of the Black River and Trenton were pointed out. 



In the present paper it has been possible to state, in the 

 briefest manner only, the principal points of interest in the 

 district under consideration. It will hov/ever serve, possibly, to 

 call the attention of those interested in the geology and palae- 

 ontology of the area to a number of places in our immediate 

 neighborhood, and in this way may be of some practical benefit. 

 There are many localities in the vicinity of Ottawa and Aylmer 

 which will yield a rich harvest to the diligent collector, if the 

 work is systematically done, as the study of the fauna in the 

 strata of this vicinity, has been by no means exhausted. 



