(Focfig (mountain (Utatiomt (patfi 



west, lying between the Peak and Grand Lake, 

 there is a wondrous area of the Ice King's topog- 

 raphy, 



Bierstadt, St. Vrain, and Mills Moraines are 

 imposing deposits of glacial debris. Of these 

 Mills Moraine has been the most studied. It 

 apparently holds the story of two widely sepa- 

 rated ice ages. This moraine evidently was 

 formed by the glacier which made the basin of 

 Chasm Lake. It extends eastward from Long's 

 Peak, its uppermost end being at twelve thou- 

 sand five hundred feet. At timber-line its 

 trend is toward the southeast. It is about one 

 mile wide, five miles long, and in places appar- 

 ently more than one thousand feet deep. 



The ice-stream which piled the enormous 

 Bierstadt Moraine took its rise on the west sum- 

 mit slope of Long's Peak. It flowed first toward 

 the west, and in the upper amphitheatre of 

 Glacier Gorge it united with the ice-stream from 

 the north slope of Shoshone Peak and the stream 

 off the eastern slope of Mt. McHenry, Although 

 a part of this enlarged flow appears to have been 

 thrust across the Continental Divide, the larger 



339 



