RE V I It IV S 979 



on this point. The youngest intrusion of all is represented by the 

 leucite-tinguaite-vitrophyre. 



It is to be noted that the process of differentiation here described, 

 inasmuch as the more acid facies of the elaeolite syenite occur on the 

 periphery of the mass, differs from those described by Brogger, in 

 which the more basic constituents have tended to migrate toward the 

 cooling surface. This difference, coupled with the fact that the 

 authors refer only once, very casually, to the whole intruded mass// as a 

 laccolite, gives cause for regret that they were not able to devote more 

 time to the study of field relationships than was actually at their dis- 

 posal. F. L. Ransome, 



Geological Survey of Canada. G. M. Dawson, Director. An7i. Rept. 

 U. S., Vol. VII, 1894. Ottawa, 1896. 



The summary report of operations is followed by a report on the 

 area of the Kamloops map-sheet by Dr. G. M. Dawson, a report of an 

 exploration of the Finlay and Oomenica rivers by R. G. McConnell, 

 a report upon the country in the vicinity of Red Lake and part of 

 Berens River, Keewatin, by D. B. Dowling, a report upon a portion of 

 the eastern part of Quebec, by R. W. Ells, with a chapter upon the 

 Lauren tian north of the St. Lawrence, by F. D. Adams, a report upon 

 the surface geology of portions of New Brunswick, Nova Scotia, and 

 Prince Edward Island, by R. Chalmers, and the usual statistical tables 

 and notes on the analyses and collections made. 



Within the year an important change in the management of the 

 survey occurred. Dr. A. R. C. Selwyn, who had served as director since 

 the retirement of Sir W. E. Logan in 1869, being granted leave of 

 absence and the following January receiving superannuation. Dr. G. 

 M. Dawson, his successor, was recalled from the field early in October 

 and has since been in charge of the work. Twelve parties were in the 

 field. Dr. Dawson himself spent some time in the Kamloops and 

 adjoining regions investigating recent mining developments. In the 

 Cariboo mining districts the study of the changes in drainage conse- 

 quent upon glacial conditions was undertaken as likely to yield 

 important results as to the distribution of the auriferous river gravels. 

 The history of these gravels and their association with the glacial beds 

 is traced in detail in the Kamloops report. Mr. R. G. McConnell 

 spent the season in the foot-hills of western Alberta and in the south- 



