186 ON THE ROCKS OF THE QUEBEC GROUP. 



it was not determined whether they were to be considered two 

 distinct beds, or one a repetition of the other. They are now 

 taken to be two distinct beds. Followed northeastwardly, they 

 appear to be dislocated by a fault near the St. Joseph Church 

 road ; but beyond this they are easily traceable around the extrem- 

 ty of a trough, with a deep channel worn between them in the 

 slate. After passing the axis of the synclinal, the band 4 comes 

 to the limestone of Guay's quarry, which is nothing more than a 

 large lenticular mass of pure limestone, subordinate to the band. 

 Southwestward of the quarry, both bands are seen again crossing 

 the St. Joseph Church road, and again coming against the trans- 

 verse fault. This fault appears to show an upthrow on its south- 

 west side; since on that side the opposite outcrops of the trough 

 are thrown towards the centre. 



Continuing to trace the outcrops on the southern side of the 

 trough, that of band 4 gradually thins, and disappears at P, in 

 less than a furlong; while that of band 3 becomes more con- 

 spicuous, and shows a greit development as it folds over an anti- 

 clinal axis just eastward of the eastern boundary of the fief St. 

 Anne. From this it returns towards the Church road, but be- 

 comes concealed about fifty yards before reaching it, after again 

 shewing the effect of the fault, in a much smaller horizontal dis- 

 placement than before. On the northeast side of the anticlinal 

 axis, on both sides of the fault, the dip is to the southeastward, 

 and is therefore overturned ; but from the character of the dis- 

 placement it is evident that beneath the surface, on the northeast 

 side of the fault, the inversion must be compensated for by a 

 change to the northwest in the slope. 



A little above the outcrop of band 4, at P, there occurs a layer 

 of sandstone, which is traceable on the fief Ste. Anne over the an- 

 ticlinal axis ; and a sandstone approaches the outcrop of band 3 

 at A 1 . Iu the description of 1 860, this was supposed to show that 

 possibly the stratigraphical place of the band 4 might gradually 

 approach the band 3, and finally merge into it ; but finding farther 

 on, along the outcrops, an exposure of conglomerate at z, which will 

 answer for band 4, it is now conceived that there may be two layers 

 of sandstone, one above, and the other below the stratigraphical 

 place of band 4 ; and though this band thins to nothing at P, it 

 may commence again in its relative place farther on. 



From the neighborhood of the Temperance Monument the 

 outcrop of band 2 is traceable northeastward, running not quite 

 parallel with 3, to the fault, and thence across the St. Joseph 



