ON THE ROCKS OF THE QUEBEC GROUP. 185 



North Ridge is a hill which rises up from and runs parallel with 

 the road passing in front of the Temperance Monument or Cross ; 

 and attains its greatest height in a hand of limestone conglome- 

 rate about 300 yards southeastward. The part of this ridge 

 nearest the road probably constitutes Mr. Marcou's Cross Hill. The 

 Middle Ridge is, I presume, Mr. Marcou's Parochial Hill. It in- 

 cludes Guay's quarry, or the Redoute, and crossing the St. Joseph 

 Church road (Route de l'Eglise), extends for about a mile to the 

 southwestward, with a somewhat broad depression southward from 

 the Burying-ground. Where Mr. Marcou's Middle Hill may be 

 situated, I am not quite sure, but suppose it to be the upper part 

 of my North Ridge, as the extension of this seems to be the only 

 hill between the Temperance Monument and Guay's quarry. The 

 South Ridge crosses the St. Joseph Church road about half a mile 

 to the southeastward of the Middle Ridge. 



The limestone conglomerates, as you are probably aware, consist 

 of beds of yellow-weathering magnesian limestone, in which, as a 

 base, are imbedded masses of pure compact limestone, of colors 

 varying from yellowish-white, through gray and brownish, to 

 nearly black. These masses are generally of a sub-spherical or 

 sub-elliptical form, looking like boulders, and many of them 

 may probably be such ; but beds of a limestone almost precisely 

 similar to them in character appear occasionally to run in an irre- 

 gular manner in the conglomerate bands, presenting the aspect of 

 original sediments. The yellow-weathering matrix is often arena- 

 ceous, the white silicious grains sometimes attaining a quarter of 

 an inch in diameter. The bands of conglomerate are separated 

 rom one another by greenish and blackish slates, which in many 

 places, are interstratified with strong yellow-weathering gray and 

 black calcareo-magnesian slates, and occasionally with yellow- 

 weathering sandstones. In a few places red slates are intermingled 

 with the others. 



South-eastward from the St. Lawrence, the limestone conglome- 

 rates of Point Le'vis are distributed over a breadth of more than 

 two miles. In the North Ridge there are four bands, numbered 

 1, 2, 3, 4, on the map ; on which is represented, in addition, a long 

 lenticular bed (4 a ) subordinate to 4, but separated from it by 

 slate. The lenticular bed is composed of brown-weathering mag- 

 nesian limestone, but appears to contain few or no enclosed masses 

 of the pure limestone. The bands 3 and 4 are, respectively, A 2 and 

 A 3 of a former description. You will perceive that northeast- 

 wardly they converge a little; and at the time of that description. 



