BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 10, pp. 193-198, PL. 21 April 3, 1899 



GLACIAL PHENOMENA IN THE CANADIAN YUKON DISTRICT 



BY J. B. TYRRELL 



{Read before the Society December S9, 1898) 

 CONTENTS 



Page 



Introduction 193 



Area traversed ... 193 



Physiographic features 194 



Glacial features 195 



Extent of the snow and ice 195 



The till 195 



Striation 196 



Moraines 196 



Terraces 197 



The classes 197 



Stream terraces '. 197 



Lake terraces 1 97 



In the Dawson district '. 198 



Introduction 



Last summer, while traveling on horseback and on foot through the 

 southwestern portion of the Yukon district and the extreme northwest- 

 ern parts of British Columbia, many opportunities presented themselves 

 for observing glacial phenomena — opportunities such as would hardly 

 occur to those who were passing through the same country in boats on 

 some of the many streams which flow along the bottoms of the many 

 deep and wide valleys. 



Area Traversed 



My route lay to the west of the Lewis river, oil and in the vicinity of 

 what is generally known as the Dalton trail — that is, up the valleys of 

 the Chilcat and Klahina or Tlehini rivers, over the summit of the Coast 

 or Chilcat range, and down a wide and continuous valley which, after 

 being occupied in succession by parts of several streams, forks, the easterl}^ 



XXIX— Bull. Geol. Soc. Am., Vol. 10, 1898 (19«^) 



