Hunt.] 2 [October 18, 



General Meeting, October 18, 1876. 



Dr. S. Kneeland in the chair. Sixteen persons present. 



Dr. T. S terry Hunt read a paper on the Quebec group, of 

 which the following is an abstract : — 



The Quebec Group in Geology. By Dr. T. Sterry Hunt. 



The name of Quebec group was given by the late Sir W. E. 

 Logan to a series of uncrystalline strata which form the heights of 

 Quebec and much of the region adjacent, and are thence traced 

 northeasterly along the valley of the St. Lawrence, and southwest- 

 erly as far as Lake Champlain. These strata were at first regarded 

 by Logan as including the Utica, Loraine and Oneida divisions of 

 the New York series, but were subsequently found from their or- 

 ganic remains to belong to an horizon below the Trenton limestone, 

 and were then first named by him the " Quebec group." They cor- 

 respond to the Upper Taconic series of Emmons. According to 

 Logan, this Quebec group may be divided into three parts; the lower 

 or Levis division, including graptolitic shales overlaid by fossiliferous 

 limestones; the middle or Lauzon division, consisting chiefly of sand- 

 stones and shales, and not known to contain fossils; and the upper or 

 .Sillery division, a great mass of red sandstones with red and green 

 shales, in which the only organic remains were an obscure Lingula 

 and a species of Obolella. 



The limestones of the Levis division contain a very abundant 

 fauna described by Billings, which was shown by him to belong to 

 an horizon near that of the Calciferous and Chazy divisions of the 

 New York series. It is this fauna which has been looked upon as 

 indicating elsewhere the presence of the Quebec group. These three 

 divisions at Quebec have a measured thickness of over five thousand 

 feet, and are found dipping at a high angle to the southeast. The 

 whole was described by Logan as having originally occupied a posi- 

 tion conformably beneath the Trenton limestone of the vicinity, and 

 as having been brought to the surface by a great break and uplift of 

 the strata. 



The speaker however showed in 1871-2 that this fault was imaginary, 

 and the Quebec group really occupies a position unconformdbly beneath 

 the Trenton; and, moreover, that the series near Quebec. is inverted, 



