THE GLACIAL LAKE MISSOULA 



377 

 around 



them is made by Wood' who records that " at Missoula . . 



the mountains a series of beaches or beach lines extend " 



The photograph of Mount Jumbo (Fig. i), a well-known land- 

 mark at the mouth of Hell Gate Canyon, brings out more plainly 

 than any written statement could the striking horizontality of these 

 parallel lines. The partly melted snow rather emphasizes them; 



Fig. ; 

 Missoula. 



-Hell Gate Canyon, Mount Jumbo, from near Northern Pacific depot, 



Still when the ground is entirely bare they can be plainly seen from 

 the city, and have been interpreted by some of the pioneer inhabitants 

 as " old buffalo trails." At close range it is difficult to locate definitely 

 any but the more prominent "trails," the highest of which has an 

 elevation above Missoula of i,ooo feet or 4,200 feet above sea (this 

 and the subsequent elevations as given were determined by aneroid) . 

 University Mountain (Fig. 2), the opposite sentinel of the Hell 

 Gate, exhibits on its western slopes a series of "trails" that are 



I Her-bert R. Wood, "Glaciation in V/estern Montana," Science, XX (1Q02), 



162. 



