﻿494 Canadian Record of Scie7ice. 



as Upper Silurian and then as a metaniorphic portion of 

 the Sillery division of the Lower Silurian, included in the 

 Quebec Group, it has been very conclusively shown on 

 stratigraphical grounds that these are directly overlain 

 by the lowest beds of the Cambrian, which in their 

 extension to the south of the province into the state of 

 Vermont, have been found to contain primordial fossils. 

 These were obtained from certain of the quartzite beds 

 several years ago by Prof. C. D. Walcott, now Director of 

 the United States Geological Survey. But little attempt 

 has as yet been made to ascertain the presence of these 

 fossils in the similar beds in their extension through 

 Quebec. 



On the eastern side of the anticlinal lower Cambrian 

 strata are also found, but this area is affected by heavy 

 faults/ so that the thickness of the Cambrian formations 

 is greatly reduced, while the fossiliferous strata are quite 

 well developed. These rocks in the old scheme were 

 placed in the Upper Silurian system. 



2nd. The complicated series of the stratified fossiliferous 

 sediments of the Quebec Group proper has been resolved 

 into several well defined divisions. The lowest of these 

 include the red and green slates, with certain bands of 

 coarse conglomerate and hard sandstone, which appear at 

 intervals along the] south shore of the St. Lawrence, 

 between Quebec and Gaspe, and, though the greater part 

 of these is poor in organic remains, portions are found 

 which contain forms which place them on the horizon of 

 the upper Cambrian, while certain other portions, from 

 their stratigraphically lower position, apparently represent 

 the lower part of the Newfoundland section and may be 

 the equivalents of the Georgia slates, which there underlie 

 the Sillery and L(^vis formations. 



Portions of the Sillery are conspicuous for the great 

 development of a coarse conglomerate, holding pebbles of 

 slate, limestone and quartzite, often of large size. In the 



