112 



have striated and polished rock surfaces during the glacial "epoch and 

 the subsequent period of submergence. The term " local glacier" Mr. 

 Chalmers defines as " an ice-sheet limited in extent, that is. confined to 

 one valley or hydrographic basin, whether large or small, and influenced 

 in its movements by local topogi'aphic features, such as mountains, 

 watersheds, hills, or the valleys of large rivers." We look forward 

 with much interest to Mr. Chalmers's forthcoming paper in the Canadian 

 Record of Science. H. M. A. 



^' Glaciation of High Points in the Southern Interior of British 



Columbia." By Dr. G. M. Dawson, Asst. Dir., Geol. Surv. Can. 



Geol. Mag. No. 302, Dec. Ill, Yol. VI, No. 8, p. 350. London, 



August, 1889. 



This very timely contribution to the history of the " Great Ice 

 Age" problem in geology, throws additional light upon the glacial 

 phenomena of Southern British Columbia, where Dr. Dawson has 

 been carrying on his explorations in connection with the Geological 

 Survey of Canada. Whilst Mr. Chalmers's paper deals particularly 

 with the eastern portion of Canada, Dr. Dawson calls attention almost 

 at the same time to the Pacific border of Canada — both papers being of 

 o-reat interest and import, as bearing on the same question from two 

 widely separated standpoints. In the August number of the Geological 

 Magazine for 1888, Dr. Dawson presented the results of his investi- 

 ■wations in northern British Columbia, and specially in the Yukon 

 countrv, where it was shown that the ice mass flowed in a northei'ly 

 direction, whilst in the southwesterly portion of the same province the 

 ice mass moved in a westerly course. This latter ioe mass Dr. Dawson 

 styled the " Cordilleran Glacier." The purport of the paper is to call 

 attention to the noteworthy heights at which gradation has now been 

 found to occur on some of the higher parts of the interior plateau and 

 its mountains and to the great mass thereby indicated for the southern 

 part of the " Cordilleran Glacier." Whilst 5,280 feet (one mile) above 

 the sea level had been previously noted as the highest point for glacier 

 ice markings, at Iron Mountain, it has been eince ascertained that Tod 

 Mountain, 25 miles north-east of Kamloops, rising 7,200 feet above the 

 sea, shows indubitable evidence of the movement of a great glacier ice- 

 mass entirely independent of the local features of the country. A table 



