No. 1.] SELWYiN — THE QUEBEC GROUP. 23 



13th lot on the line between Chester and Halifax to the Chau- 

 dierc, near the line between St. Mary and St. Joseph." The 

 synclinal spoken of is a purely theoretical one, and if we lay the 

 above described line down on the map, it will be found to cross 

 diagonally not only this Sillery synclinal, but likewise the Lauzon 

 and the Levis formations, as shown on the map ; while, on the 

 other hand, it runs entirely parallel with the line which, without 

 any previous knowledge of the above quoted description, I had 

 myself carefully traced on the ground, in 1867, as the upper 

 limit of the magnesian belt and division 2, and the unconform- 

 ably overlying fossiliferous Ijevis formation. 



The gneissic mica schists of Sutton Mountain are probably the 

 deepest exposed portion of this great anticlinal. To the north- 

 east, between the county of I'lslet and the Trois Pistoles River, 

 the rocks of the anticlinal have not been traced. They will, 

 however, doubtless be found to continue till they pass beneath 

 the overlapping Upper Silurian strata which on the Rimouski 

 River are stated to rest directly on the fo-siliferous Levis forma- 

 tion. Rocks which clearly belong to the upper part of the 

 division, with associated traps, emerge from beneath the Upper 

 Silurian all along the northern shore of Matapedia Lake, and I 

 think it will be found that they extend thence into the Shick- 

 shock Mountains, which on the north are flanked by the L^vis 

 fossiliferous rocks, and on the south by strata of Upper Silurian 

 age. The investigation of the structure of these mountains pre- 

 sents a fine field for any active and enterprising geologist. 



The copper ores of the region under consideration, to which 

 too much importance has, I think, been attached, in determining 

 the limits of the divisions of the Quebec Group, appear to me to 

 belong to two distinct periods, and to occur under conditions 

 almost, if not quite, as distinct as they do in the Huronian and 

 " Upper Copper-bearing " rocks of Lake Superior. Those of the 

 first period belong to the crystalline, magnesian schist group, and 

 occur both in beds and in lenticular layers parallel with the strati- 

 fication, and]also in veins cutting the strata transversely, but in 

 no case accompanied by intrusive crystalline rocks. The Harvey 

 Hill mine, the Viger mine and the Sherbrooke mines are 

 examples of this mode of occurrence. Those of the second period 

 seem to be cheifiy confined to the rocks of Division 2, but occur 

 also within the limits of the Levis fossiliferous belt. They are 

 in almost every instance more or less closely associated with cer- 



