250 



ham, Claremont, and Cape Rouge, the extremity of Point Levi, and a 

 little of the clitF west of it, and finally a part of the island of Orleans. 

 It rests unconformably upon the different subdivisions of the St. 

 Albans group ; that is to say, on the Taconic slates of Gilmor Wharf, 

 the Redoute limestone, and the Sillery and Chaudiere red rocks. 

 This unconformability is somewhat diflicult to make out, because the 

 strata have been so dislocated, folded, and squeezed, that they often 

 appear as if they lay below the St. Albans group instead of being 

 above, as they are in fact. But patient and numerous observations 

 made with a theodolite, or a good compass, will clear up all the 

 difficulty. 



In Remarks on the Faujia of the Quebec Group, &c., Mr. Logan gives 

 some details, calling separate exposures or outcrops, A, A\ A'-, A^ 

 A*, B\ B", and B^, and considering the whole as one group of strata. 

 I tried without success to understand his explanation when I was at 

 Point Levi, his memoir in one hand -and my hammer in the other. 

 The only thing I was able to make out was : 1st, that what he calls the 

 more northern outcrop, A^, was mainly the quarries of the Notary 

 Guay, or the Redoute limestone ; I say mainly, for other strata may be 

 included in it, of limestone and conglomerate which surround the len- 

 ticular mass of the Redoute* ; 2d, that his outcrops A\ A^, A^ B\ B-, 

 and B'^, were a single group of strata, with repetition of several beds 

 by folding, situated between the churches of St. Joseph and Notre 

 Dame, a little east of that line, and in a parcel of ground called by 

 the Canadians Terre du Cure (land of the Curate of St. Joseph) ; 3d, 

 the cliff A is exposed very well on the road leading from the ferry to 

 Notre Dame church. 



Mr. Logan includes also in his Quebec group the Sillery red shales 

 and sandstones, the whole having, perhaps, a thickness of five or seven 

 thousand feet, and regards it as the equivalent of the Calciferous Sand- 

 stone and Chazy Limestone. The Chazy Limestone is a small subdi- 

 vision of the Black River group, and I did not see it, or any equiva- 

 lent of it. The cliff A is in part subdivision a of the Calciferous 

 Sandstone of my tabular view. The outcrops A^, A^, A*, B\ B", and 

 B^, form entirely my subdivision h ; I will call them sti-ata de la terre 

 du Cure. The fossils are very numerous in several beds, especially in 

 some of the brecciated limestone ; the most common are : Bathyurus 

 Saffordi, B. Cordai, B. bituberculatus, B. quadratus ; Cheirurus Ajiollo, 

 C. Eryx; Agnostus ; Ecculiomphalus Canadensis, E. intortus ; Holopea 

 dilucula; Pleurotomaria ; Murchisonia ; Orthoceras; Cyrtoceras; Orthis; 

 Camerella calcifera, etc., all belonging to the second fauna. Mr. Logan 



* So called by the older Canadians because there was a Redoubt there during the 

 last French war. 



