No. 2.] MACFARLANE — CANADIAN STRATIGRAPHY. 91 



VII. Pyroxene, Garnet, Epidote and Chrysolite Rocks, 

 CONTAINING LITTLE OR NO FELDSPAR : including Pyroxenyte, 

 Lherzolyte, Garnetyte (Garnet rock), Eclogyte, Epidosyte, 

 Chrysolyte or Dunyte (Chrysolite rock), etc. 



VIII. Hydrous Magnesian and Aluminous Rocks, con- 

 taining little OR NO Feldspar: including Chlorite schist, 

 Talcose schiwSt, Serpentine, Ophiolyte, Pyrophyllite schist, etc. 



REMARKS ON CANADIAN STRATIGRAPHY. 



By Thomas Macfarlane, Esy. 



Mr. Selwyn's recent paper " On the Stratigraphy of the 

 ^' Quebec Group and the older crystalline rocks of Canada" marks 

 an important event in the history of the Geological Survey. To 

 those who, like myself, have not heretofore accepted unhesitatingly 

 the theories of the Survey authorities, the publication of this paper 

 is of great interest. At the same time, many will, I think, regret 

 that it is unaccompanied by any geological map or sections of the 

 territory whose stratigraphy is discussed. Without this it is quite 

 impo.^^sible for the general public, and quite difficult for the stu- 

 dent of Canadian geology, to follow Mr. Selwyn, to obtain a clear 

 idea of the reasons which have caused him to differ so profoundly 

 from his predecessor Sir W. P]. Logan, or to form a judgment as 

 to the relative merits of their respective conclusions. Mr. Selwyn 

 indeed informs us that " a considerable amount of careful inves- 

 " tigation and laborious work in the field is yet required before 

 " the indicated divisions can be correctly delineated on the map," 

 but, although this may be an excellent reason for not as yet 

 publishing any map illustrative of Mr. Selwyn's views, still it 

 cannot be regarded as affecting the map of south-eastern Quebec 

 by Sir W. E. Logan, so long promised by him, and upon which 

 he laboured so earnestly. Indeed, I trust that the members of 

 the Natural History Society and the public generally will join 

 with me in urging upon Mr. Selwyn the advisability of publishing 

 this map, for I think that we have all been under the impression 

 that the views of the former Director of the Survey derived their 

 strongest support from stratigraphical considerations. 



