THE MILNOE AND HERMAN BEACHES. 313 



ridge is nearl}^ flivt upon a wiilth oi 10 to 30 rods, and is 75 to 100 feet 

 above the river, being highest westward. It contains pebbles and cobbles 

 of all sizes np to 6 inches in diameter, abont half being limestone and 

 nearly all the others granitic. Thig ridge or plateau of gravel is a remnant 

 of a,n old delta plain of the Sheyenne River, apparently deposited before 

 the formation of the Milnor beach, above which it rises some 40 or 50 feet, 

 which suggests that the deserted channel of that depth on its south side 

 was probalily eroded during the Milnor stage of Lake Agassiz. Similar 

 gravel occurs on the side and verge of the bluff, 100 feet high, northwest 

 of the Sheyenne River, in the southwest quai'ter of section 29, township 

 134, range 54, bi;t a rolling surface of till extends thence northwest. 



The height of the Sheyenne River in section 32, township 134, range 

 54, is 1,039 feet above the sea; and on the west line of the northwest 

 quarter of section 29, township 135, range 54, 1,021 feet. Its bed through 

 these townships is mostly 4 to 6 rods wide, with water 1 to 2 or 3 feet 

 deep, and is strewn in many places with cobbles and bowlders up to 2 or 3 

 feet and rarely G or 8 feet in diameter. Its bottom land near the south 

 bend, about a third of a mile wide, is 15 or 20 feet above the ordinary low 

 stage of water, and during a term of foui'teen years preceding this survey 

 in 1885 it had not been overflowed; but driftwood, found by the first 

 immigrants, proves that the river sometimes reaches this height. Bluffs 

 of till here, in the southwest corner of township 134, range 54, rise 100 to 

 125 feet above the stream. 



Bluffs of till close west of the Sheyenne River, in section 20, township 

 134, range 54, 1,100 to 1,110 feet; moderatel}'' rolling till a quarter of a 

 mile farther west, 1,115 to 1,125 feet; same in sections 17 and IS, 1,090 to 

 1,130 feet; and on the east side of the river, in sections 21, 16, and 17, 

 1,085 to 1,075 feet, descending northeastward. Prominent swell of till 

 west of the Sheyenne River, in the southeast quarter of section 30, town- 

 sliip 135, range 54, having four aboriginal mounds on its crest, 1,113 feet; 

 top of these momids, 1,117 feet, very nearly. Highest portions of the area 

 of undulating till seen westward from this section 30, 3 or 4 nules distant, 

 1,125 to 1,150 feet. 



