346 THE GLACIAL LAKE AGASSIZ. 



that tlie Soutli Brancli of Turtle River has eroded a A'alley 40 to 75 feet 

 deep. The distance of IJ miles from Larimore north to this stream is a 

 gradually descending, smooth slope, but its noi-thern bluff rises steeply to 

 a height a few feet above that of Larimore. 



Great Northern Railway at Larimore, 1,134 feet above the sea; at 

 McCanna, 1,140 feet; on the bridge over the North Branch of Turtle 

 River, 1,132 feet, 17 feet above the stream; at its summit, in the north- 

 east corner of section 22, Agnes, grade and natural surface, 1,164 feet; at 

 Orr's station, 1,098 feet. 



Lower Herman beach, running northwesterly in the northeast part of 

 section 24, Elm Grove, 1,127 to 1,128 feet, with depression of 2 to 3 feet 

 on its west side; in section 13, 1,127 to 1,132 feet; in the west jiart of 

 section 12 and the northeast part of section 11, 1,130 to 1,135 feet, being 

 in these sections the easternmost in a succession of three beach ridges, the 

 two others of which are 10 feet higher; at E. C. D. Shortridge's house, in 

 the center of section 2, 1,137 feet, forming a broad, flat swell of sand and 

 fine gravel, with a depression of 3 to 5 feet on its west side; in the west 

 part of section 36, through sections 20 and 23, and the southwest edge of 

 section 14, Agnes, a continuous, well-defined beach ridge, 1,140 to 1,149 

 feet, with a. descent of 10 to 15 feet on the east and a depression of about 

 5 feet on the west; in the east edge of the northeast quarter of section 

 15 and through the southeast quarter of section 10, Agnes, a deposit of sand 

 and fine gravel, with neai'ly level top 20 to 30 rods wide, 1,145 to 1,14'J 

 feet, from which a slope falls 10 or 15 feet in 20 to 30 rods eastward, while 

 on the west it is bordered by a slough 5 to 20 rods wide, which is parti}' 

 jjermanent water and i)artly mowing land. It is to be noted that the 

 northern two-thirds of the beach here described for a distance of 8 miles 

 coiTesponds in elevation with the two beaches close east of Larimore and 

 with then- continuation northward to the North Bi-anch of Turtle River, 

 marking the third Herman stage of Lake Agassiz; but that the southern 

 part records a slightly lower level of the lake, when it had fallen about 10 

 feet, or to its fourth Herman stage. 



On the Avest side of this beach a smoothly undulating, broad swell of 

 till, which was an island in Lake Agassiz, lies in the west part of section 26 



