SECTIONS ACEOSS THE RED RIVER VALLEY. 



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average ascent of 30 or 40 feet per mile. On the west the plain ascends 

 only 50 feet in the first 25 miles, beyond wiiich it ascends within 7 miles 

 to 1,099 feet above the sea-level at the highest beach line, 4j miles west of 

 Wheatland, and a similar- slope continues to a height of 1,200 feet at a 

 distance of 4 or 5 miles farther west. 



Fio. 3.— Section across the Red Kiver Valley on the latitude of Moorhead and Fargo. Horizontal scale, 20 

 miles to an inch ; vertical scale, 1,000 feet to an inch. 



At Grand Forks, where the Red Lake River joins the Red River, 150 

 miles north of Lake Traverse, the surface of the plain is 830 feet above the 

 sea (fig. 4). In the first 20 miles east the ascent is about 75 feet. Thence 

 in 25 miles southeast there is a gradual rise of nearly 300 feet to the 



Fig. 4— Section across the Eed River Valley from Larimoreand Grand Forks to Maple Lake. Horizontal 

 scale, 20 miles to an inch; vertical scale, 1,000 feet to an inch. 



highest beach of Lake Agassiz, close west and north of Maple Lake; but 

 in a line passing due east the surface ascends only about 200 feet in an 

 equal distance, and continues at a lower elevation than this beach to the 

 east side of Red Lake, 100 miles from Grand Forks. On the west the 

 surface rises only 35 feet in the first 14 miles, beyond which it rises about 



