398 THE GLACIAL LAKE AGASSIZ. 



farther north, these inconspicuous beach ridges pass about 1 mile and a half 

 mile east of Nash, their elevations being- 1,012 and 1,010 feet. One to 

 2 miles onward, in sections 25 and 2G, Champion, both ridges are somewhat 

 more distinctly developed at 1,012 and 1,008 feet, each being 3 to 4 feet 

 high above the till on each side. 



Thence northward between the Rabbit and Red Rivers the level of 

 these beaches was carefully followed with leveling across a very smooth 

 and flat expanse of till; but no distinct shore marks, either of lidged beach 

 deposits or of any noticeable erosion, were found. The shore passes almost 

 due north, lying from a half mile to 1 mile west of the east side of Brad- 

 ford, and crosses the Red River in the southeast part of township 132, 

 range 45, between 2 and 3 miles above its most southern bend. 



Within a half mile to IJ miles north of the Red River two Tintah 

 beach ridges are well developed, consisting of gravel and sand which lie 

 on till. The eastern and higher ridge in the northwest quarter of section 

 26 and southwest quarter of section 23, township 132, range 45, varies in 

 width from 10 to 25 rods; its crest is 1,019 to 1,023 feet above the sea, 

 and both its eastern and western slopes fall 3 to 7 feet. Tln-ee-quarters of a 

 mile to the west the crest of the lower ridge, which is of similar size, has 

 a height of 1,012 to 1,015 feet. Through the next 2 miles these beaches 

 are not distinctly traceable, and the surface consists of slightly undulating 

 till. In the east edge of section 4, this township, the upper shore-line again 

 bears a conspicuous gravel ridge, with crest at 1,020 to 1,022 feet, from 

 which within 10 rods there is a descent of 5 feet eastward and 6 to 8 feet 

 westward. 



In the northeast corner of section 28, Andi-ea, the uj^per Tintah beach, 

 a typical gravel and sand ridge, has an elevation of 1,017 to 1,018 feet 

 above the sea. Along the next 2 miles northward, in sections 21 and 16, its 

 crest holds a nearly uniform height of 1,017 to 1,019 feet, being 3 to 4 

 feet above the hollow east of the beach, and 6 to 7 feet above the adjoining 

 surface on the west. Through the west half of section 9 and the southwest 

 quarter of section 4 this beach is not distinctly a ridge, but is represented 

 by a somewhat broad tract of gravel and sand. In the east edge of sec- 

 tion 6, Audi'ea, about a mile west of the foregoing, the lower Tintah beach 



