134 Canadian Record of Science. 



occasion to return to this subject, and to remark also on 

 the attempts which had been made to depreciate Logan's 

 great work in the Laurentian and Huronian systems. In a 

 still more recent paper on the " Older Eocks of Eastern 

 Canada in comparison with those of Modern Europe," 1 I 

 have incidentally referred to the same questions, and in the 

 new edition of my " Handbook of Canadian Geology " 

 (1889), have upheld the Laurentian and Huronian and the 

 Quebec Group in all their integrity. 



It would seem, however, from some recent discussions, 

 especially on the other side of the international boundary, 

 that there is still need to vindicate, not so much the repu- 

 tation of our great Canadian geologist as some important 

 facts of Canadian geology connected with his work, and 

 which are not appreciated by some as they deserve. 2 I 

 shall here refer mainly to the reasons which seem to me 

 good and sufficient for retaining the term "Quebec Group" 

 for that peculiar and important development of the lower 

 member of the Siluro-Cambrian, Cambro-Silurian or Ordo- 

 vician, which is so widely distributed in the eastern part of 

 the Province of Quebec, constituting indeed the dominant 

 feature, as the name itself would import, in the palaeozoic 

 geology of this portion of Canada. 



The " Quebec Group " of the great Canadian geologist 

 should be understood in the sense in which he proposed it 

 thirty years ago, 3 viz., as designating " a great develop- 

 ment of strata about the horizon of the Ghazy and Calciferous," 



1 Journal Geological Society of London, Nov. 1888. 



2 American Journal of Science and American Geologist, April 

 1890. 



3 The first publication of Logan's name known to me was in 

 1861 ; and it is true that before this time Amos Eaton had desig- 

 nated similar rocks as "First Graywacke," and Emmons had called 

 them " Upper Taconic," but there were good reasons why Logan, 

 while frankly admitting the credit due to Emmons for maintain- 

 ing the true age of these rocks, should not think it expedient to 

 adopt either of the above names, one of which had been discredited 

 by the progress of science, and the other by errors and controver- 

 sies, the evil effects of which continue even until now. 



