Diagram Sections of structure of Quebec Group on the Vermont and Canada Boundary. 
No. 1. ; 




No. 2. 
Unconfermable Cambro-Silurian. Unconformable Siluro-Devonian rocks 
(Fosnliferous Quebec Group.) Sutton Mountain, Ÿ come on and cover the Pre-Cambrian. 
° Levis, dec. i È 




——{ Lake Memphremagog. 

| 
LLL A GLE Lo SSNS = Jk SNE NS 

Soale: 4 miles to one inch. 
No. 1.—Logan, shewing distribution of Levis, Lauzon and Sillery formations of the Quebec Group (altered Quebec Group) in which the actual 
anticlinal structure is converted into the theoretical synclinal, as described, Geology of Canada 1863, p-p. 247 and 251. 
No. 2.—Selwyn, shewing great Pre-Cambrian axis overlaid to the west by unconformable Cambro-Silurian, and to the east by unconformable 
Siluro-Devonian. 
