120 THE CAMBRIAN. |buli.81. 



from the north end of the Archean anticlinal or axis, along the eastern 

 side of the latter to Lake Memphreinagog. A smaller area is colored 

 Cambrian in the southeastern part of the Province of Quebec, near the 

 Maine boundary, at the northeastern corner of New Hampshire. In a 

 map of a part of the Province of Quebec published in 1887, the dis- 

 tribution of the Cambrian about the Sutton Mountain anticlinal, or 

 the Archean axis, extending north from the Green Mountains, is given 

 more in detail than in the map of 1882. 



In the table of the geological formations, accompanying Macfarlaue's 

 American Geological Railway Guide, Dr. T. S Hunt places the follow- 

 ing groups in the Lower Cambrian, in descending order: 1 



Potsdam. 



Sillery. 



Acadian (Meneviau). 



Lower Taconic. 

 This same nomenclature is followed in the list of the geological forma- 

 tions of Canada on page 52. 



In a report on the explorations and surveys in the interior of the 

 Gaspe Peninsula, Mr. A. P. Low- states that the Cambrian system is 

 represented along the Ste. Anne River and along the east and west 

 flanks of Table-top Mountain, by gray and black shales, limestoues, 

 and limestone-conglomerates of the Levis formation. He says : 



These form but a small part of the great area of these rocks, which stretches from 

 Cape Rosier along the south side of the Gulf of St. Lawrence to Quebec and thence 

 through the Eastern Townships into the United States. 



In describing the Silurian rocks on a previous page 3 he says the 

 limestones rest in places upon a pinkish or gray sandstone of no great 

 thickness, which is seen on the Ste. Anne and Matane Rivers and on 

 the west side of Lake Matapedia. This sandstone is supposed to be 

 the lowest part of the system. 



In his surveys of the eastern portion of the Province of Quebec, Dr. 

 R. AY. Ells 4 included in the Cambrian the extension to the northeast of 

 those rocks described as Cambrian by Dr. Selwyn. As described in the 

 reports of the Geological Survey of Canada for 1886, 1887, they consist 

 for the most part of hard quartzite iuterstratified with mica schists and 

 black slates. Dr. Ells also referred the trappean rocks of Broughtou to 

 the Cambrian. All of this series, as described by Dr. Selwyn and Dr. 

 Ells, is uncouformably overlapped by the Sillery red slates, conglomer- 

 ates, and sandstones. It is not improbable that some of the strata 

 referred to the Lower Cambrian may prove to belong to that system of 

 rocks, but in the absence of fossils it is very uncertain whether the strata 



1 Dominion of Canada. (Geological Formations.) Macfarlane's Am. Geol. K. K. Guide, 1879, p. 51. 



2 Explorations and surveys in the interior of the Gaspe Peninsula, 1883. Geol. Surv. Canada, 1882-83- 

 1884, p. 14F. 



8 Op. cit., p. 12F. 



4 Second report on the geology of a portion of the Province of Quebec. Geological Survey Canada, 

 new ser., vol. 3, 1889, pp. 1K-120K. 



