BEACHES AND ISLANDS. 345 



BEACHES AND ISLANDS EAST OF THE ELK AND GOLDEN VALLEYS. 



(PLATES XXIX AND XXX.) 



Returning about 4') miles south to Larimore, we liave yet to describe 

 the beaches of Lake Agassiz and its islands of rolling and hilly morainic 

 till which divided the strait of the Elk and Golden valleys in Grand Forks 

 and Walsh counties from the main body of the lake. 



The crests of the upper or first and the second Herman beaches before 

 described, respectively 4f and 4^^ miles west of Larimore, are 1,162 and 

 1,146 feet above the sea. The third Herman beach, a tliird of a mile east 

 of Larimore depot, has its crest at 1,133 feet; and another beach belonging 

 to the same stage of Lake Agassiz, a third of a mile farther east, rises to 

 1,134 feet, with descent in 30 or 40 rods east 11 feet, and in the same 

 distance, west 9 feet. The fourth Herman beach, consisting of four small 

 beach ridges crossed by the railway li to 2 miles east of Larimore, has 

 crests at 1,123 to 1,118 feet, Avith intervening hollows 3 to 5 feet deep. 



The beach seen two-thirds of a mile east of Larimore passes north and 

 north-northwesterly through the east half of sections 7 and 6, Arvilla, and 

 the west half of sections 31 and 30, Hegton, into the southeast corner of 

 section 24, Elm Grove. North of the South Branch of Turtle River it is 

 not a typical ridge, but a series of massive rounded swells of sand 10 to 

 15 feet high, with their crests at 1,13;") to 1,140 feet. 



A parallel beach ridge, a tiiird to a half mile west of the foregoing, 

 mostly massive, with typical wave-like form, has an elevation of 1,133 feet 

 close east of Larimore; 1,144 feet at a cemetery close north of the South 

 Branch of Turtle River in or near the southwest corner of section 31, Heg- 

 ton; chiefly 1,137 to 1,140 feet in its course thence north-northwesterly 

 through sections 36 and 25, tlie west edge of section 24, and the east half 

 of section 14,' Elm Grove; 1,142 to 1,145 feet in the west half of section 

 11, and 1,143 to 1,147 feet in the east edge of section 3 of this township. 

 Along the west edge of section 11, a duplication of this beach ridge, of the 

 same massive size, lying a half mile farther west, extends a mile south from 

 the North Branch of Turtle River, its crest being at 1,142 to 1,145 feet; 

 but thence southward the general elevation is about 1,130 feet to the broad 

 tract of this height crossed by the railway west of Larimore, excepting 



