59 



however, the geological colouring stops short of Riviere du 

 Loup. It is evident, however, from a consideration of 

 the general geological structure of the region, that according 

 to the views of Dresser, the district in the neighbourhood 

 of Riviere du Loup, is in the main underlain by the Sillery. 

 In the geological legend of the map by Dresser, the Sillery 

 is classified as being of Cambrian age. In the general 

 Sillery area, are isolated areas of quartzites and conglo- 

 merates with pebbles of limestone, etc. These rocks are 

 distinguished as forming the Kamouraska formation and 

 by Dresser are considered to be older than the Sillery and 

 possibly to underlie the Sillery unconformably. The areas 

 of the Kamouraska formation as mapped by Dresser, 

 in a general way correspond to one of Richardson's Pots- 

 dam divisions, the division to which Richardson assigned 

 the band of quartzite crossing Riviere du Loup below High 

 Falls. It is believed, however, that Dresser would not 

 correlate the quartzite outcropping on Riviere du Loup 

 with the Kamouraska formation. 



DETAILED DESCRIPTION. 



The foregoing statements present in a generalized 

 fashion, the views previously published regarding the age 

 of the strata occurring at Riviere du Loup in the imme- 

 diate vicinity of High Falls. In the following statements 

 is given an account of the strata and their structure as 

 observable in a general section along both banks of Riviere 

 du Loup from the neighbourhood of the railway station 

 to below High Falls. The section illustrates, in a general 

 fashion, the nature of a portion of the original Quebec 

 group and of the difficulties in the way of a complete 

 unravelling of the various problems involved. 



On lithological and structural grounds, the strata of 

 the section under description are divisible into four groups. 

 The succession descending the river is as follows: — 



1. Red, green, and black shale. 



2. Black shale, and sandstone. 



3. Black shale. 



4. Grey sandstone. 



By Logan the first three divisions (Nos. 1 to 3) were 

 placed in the Sillery and supposed to be of Lower Ordo- 



