38 



The width of the Etcheminian terrane along this side of the Mira 

 valley for a distance of four miles on the strike is, at the 

 West Bengal road, 3,000 feet ; 

 East Bengal road, 5,000 feet ; 

 Boston road, 4,000 feet. 



On the East Bengal road the bulk is increased by repetition of a 

 part or all of the Lower Etcheminian. 



Wide tract of 

 Etcheminian 

 on Sydney 

 and Louis- 

 burg roads. 



WITDTH OF THE ETCHEMINIAN ON THE SYDNEY AND LOUISBURG ROAD. 



Mr. Fletcher gives data in his report which enable us to form an 

 estimate of the extent to which the Etcheminian is spread out in the 

 lower part of the Mira valley. He speaks of many outcrops of red and 

 gray argillites, &c., along the Sydney and the old Louisburg road, from 

 which it would seem that a width of two miles from a point near the 

 Albert bridge to the McMillan lakes is occupied by Etcheminian rocks. 

 And from these roads eastward to Mira gut, his descriptions would 

 show that the country, coloured as Silurian (i.e., Cambrian) is occupied 

 by the Etcheminian terrane. 



Etcheminian 

 rocks around 

 the head of 

 Mira river. 



OTHER AREAS OCCUPIED BY ETCHEMINIAN ROCKS. 



There are other considerable areas coloured by Mr. Fletcher as 

 Silurian (i.e. Cambrian) that are to be assigned to the Etcheminian 

 terrane. Where he speaks of red and green argillites, or sandstones, 

 or of conglomerates with felsite stones and grains, in the valley of the 

 Mira river, it is reasonably sure that the rocks belong to the Etche- 

 minian terrane. No rocks of the St. John terrane are indicated by 

 these names, as all these are gray of various shades, from pale gray 

 to almost black, or with a pale purplish tinge, and as a rule, they are 

 more fossiliferous. 



South of the ridge of effusive and intrusive rocks that bound the 

 Mira valley on the south and east are outliers of stratified rocks which, 

 from Mr. Fletcher's descriptions, appear to be Etcheminian. They 

 are conglomerates with some greenish-gray argillites. Mr. Fletcher's 

 description of the rocks on Canoe and Easg brooks, indicates that a 

 belt, of Etcheminian sediments extends from the Bengal road along 

 the valleys of these brooks to the head of the Mira river above 

 Victoria bridge. 



At the head of the Mira river on its western side is a considerable 

 stream in the valley of which are Etcheminian deposits, judging from 



