CHAPTER II 

 PLEISTOCENE GLACIATION 



ALL geologists who have studied the region we tra- 

 versed are agreed that the glaciers were much more ex- 

 tensive in Pleistocene time than now; but opinions dif- 

 fer widely as to the actual magnitude of the ancient ice 

 fields, and also as to the extent to which they modified the 

 topography of the country. As the nature of my journey 

 rendered my view somewhat cursory and superficial, and 

 as nearly all parts of my route had been covered, with 

 better opportunity, by one or more of my predecessors, 

 I can not expect to settle any of the vexed questions, but 

 it still seems best to make rather full record of my obser- 

 vations and impressions. When an observer views a 

 complex phenomenon his attention is naturally directed 

 to the particular features which his previous training en- 

 ables him to appreciate he " sees what he has eyes to 

 see"; and the difference of eyes makes the work of 

 independently trained observers more or less comple- 

 mentary. 



("3) 



