PART OF THE PEOVINCE OP QUEBEC. 12S 



6. The Utica-Loraiue, seeu to the north of Quebec, at Montmorency Falls, and on the 

 south shore of the St. Lawrence, west of the great Ohamplain fault from the 

 contact south of St. Nicholas to Lake Champlaiii. 



T. The Silurian — embracing the areas of reddish sandstone and shales east of the St. Law- 

 rence, apparently devoid of fossils, but of supposed Medina age ; the slates and 

 limestones of Dud swell, and the St. Francis valley north of Sherbrooke, and the 

 area in the vicinity of Memphremagog lake ; the whole characterized by fossils 

 of upper Silurian age, from the Niagara to the lower Helderburg, both inclusive. 



8. Certain areas of limestone on the Chaudière, in Langevin and on the peninsula of Graspé, 

 which may be regarded from the contained fossils in pari as Siluro-Devonian, and 

 which graduate upward into the sandstones and shales of the Oriskauy, forming 

 areas of considerable extent, both along the Graspé coast and throughout portions 

 of the interior of that peninsula. 



Of writers in the United States, those who have most recently discussed the question 

 of Canadian geology, as presented south of the St. Lawi-ence and in the vicinity of Quebec, 

 are Profs. Walcott and Jules Marcou. For the purpose of comparison, the latest views of 

 these writers on the subject may be subjoined. 



Prof. Marcou, in his paper " Canadian G-eological Classification for the Province of 

 Quebec," published in the ' Proceedings of the Boston Society of Natvxral History ' in 1889, 

 after discussing the various opiuious held from time to time by the different workers in 

 this field, states his views as to the stratigraphy of the Province of Quebec. 



In this the formations below the Silurian, are arranged as follows : 



" Vtica, from Rouse's Point to St. John's Lake. 4th zone of graptolites." 



" Trenlon, including Chazy and Calciferous, not distinguishable as subdivisions from 



Chicot Creek, (St. Peters' Lake) eastward to Montmorency and Western Newfoundland." 

 "Break, unconformity at Chazy and Beaixharnois." 

 "Potsdam, does not exi.st round Three Rivers, nor the city of Quebec nor farther east. 



It exists only round Montreal as far north-east as St. Cuthbert, in Berthier county." 

 " Break and overturn of all the slates and strong unconformity." 

 " Citadel Hill and Quebec Cily, or Sivanton Slates. Third zone of graptolites and 



colonies." 



" Point Levis and Philipsburg. Second zone of graptolites, colonies." 



" Georgia, from Highgate, Vt. to St. Denis, Bic harbour, etc.; first zone of graptolites. 



Olenellus belt." 



" St. Albans, much developed in the Chaudière, and around Actonvale and Richmond. 



A few Olenellus forms exist east of St. Albans, west of Shelton and in the granular quartz. 



This formation represents the Olenellus bed of Cape Breton, East Newfoundland and 



Scandinavia." 



Without indulging in any lengthy criticism of Prof Marcou's classification, it is but 

 fair to say that the work of the last three years about Quebec and in the Eastern Town- 

 ships has revealed sufficient facts regarding the structure to warrant the statement that 

 in some points the arrangement of his divisions does not correspond with the stratigraphy 

 or the fossil evidence. Thus, first, in the division Trenton, the Chazy and Calciferous are 



