No. 1.] SELWYN — THE QUEBEC GROUP. 21 



eastern side of the axis, is locally made up of altered volcanic 

 products, both intrusive and interstratified, the latter being 

 clearly of contemporaneous origin with the associated sandstones 

 and slates. The greatest development of these volcanic rocks 

 appears to occur, as above stated, on the south-eastern side of 

 the main axis, to which I shall presently refer, and about the 

 summit of Division 3, of which they may perhaps be only an 

 upward extension, as we have at present no evidence of any un- 

 conformity between these two divisions. The rocks composing 

 it have hitherto nearly all been included in the Sillery sand- 

 stone formation, and supposed to be everywhere the highest 

 member of the " Quebec group " ; represented by a yellow color 

 on the geological map of Canada and on the unpublished map 

 already referred to. It appears to me, however, that neither their 

 true stratigraphical position nor their geological characters have 

 been correctly defined, and they have, regardless of these, been 

 confounded and incorporated with the true Sillery sandstones, 

 which are only a local development of thick sandstones at several 

 horizons in the Quebec group or fossiliferous Ldvis formation. 

 At Sillery above Quebec, and at various points thence north- 

 eastward to Gaspe, good exposures of these sandstones may be 

 examined, and it has now been shewn that at Little Metis at 

 Ste. Anne (the Pillar sandstones of Mr. Murray's report of 18 J:-i) 

 and elsewhere they are characterized by graptolites and other 

 Levis fossils, whereas in the massive red and green sandstones 

 and slates which are associated with the volcanic rocks, and 

 which the stratigraphy, as I think, clearly shews to be a lower 

 unconformable formation, no fossils of any description have yet 

 been found. Certain fucoid markings in slates near Actonvale 

 may perhaps, however, belong to this division. Further exami- 

 nation will probably afiTord other fossils, but if so I should expect 

 them to indicate a lower horizon than the Levis formation, prob- 

 ably not far removed from that of the St. John group and 

 the Atlantic coast series of Nova Scotia. In describing this belt 

 of sandstones and slates which extends north-eastward from St. 

 Claire on the Etchemin river, Sir W. Logan writes : " The area 

 over which these strata occur commences in a point near the 

 Chaudiere ; it has been traced to the north-eastward across the 

 Seignories of St. Mary and Joliette into St. Gervaise, and it 



probably extends much further The distance between 



this area and its equivalent to the south is about ten miles." 



