294 THE GLACIAL LAKE AGASSIZ. 



A lower beach, contemporaneous with the Herman beach fartlier south, 

 but formed when the sui-face of the lake in this latitude had fallen slightly 

 from its highest level, is finely exhibited at a distance of one-third to two- 

 thirds of a mile west from the upper beach, through the 4 miles from the 

 south side of section 20 to the northeast corner of section 4, Keene. The 

 elevation of this secondary beach in the south pai-t of section 20 is 1,115 

 feet ; thence to a stream near the east line of the southeast qxiarter of sec- 

 tion 17, 1,118 to 1,123 feet; at each side of this stream, 1,118 feet; north- 

 ward, in the northwest part of section 16 and in the southwest quarter of 

 section 9, 1,118 to 1 121 feet: and in the north part of section 9, 1,121 to 

 1 127 feet. 



Upper beach through the west part of section 10, Keene, 1,130 to 

 1,137 feet, increasing in height from south to north. This is a typical 

 beach ridge of gravel, with a rather abrupt descent on its east side to land 

 6 or 8 feet lower, which thence ascends with a slightly undulating sui'face 

 eastward. The elevation of the upper beach in this township, 1,123 to 

 1,137 feet, shoAvs that the height of Lake Agassiz here, during its maxi- 

 mum stage, was about 1,120 feet. The secondary beach was made by the 

 lake after it had fallen 6 to 10 feet. 



In section 3, Keene, the crest of the upper beach is at 1,134 to 1,137 

 feet, 10 feet above the land next east: and tlie top of the secondary Her- 

 man beach, parallel with this and about three-fourths of a mile distant to 

 the northwest, in sections 4 and 34, is at 1,123 to 1,127 feet, being thus 10 

 feet lower than the highest parts of the eastern beach. Extensive sloughs, 

 inclosing lakelets, lie between these beaches in sections 34 and 35, Hagen, 

 at an elevation of 1,115 to 1,120 feet, but sinking northward to 1,105 feet. 

 The secondarj- beach continues to the northeast corner of section 26, declin- 

 ing in height northeastward as it approaches the South Branch of the Wild 

 Rice River, being at 1,125 to 1,115 feet. 



Upper beach in section 35 and in the south part of section 25, Hagen, 

 1,140 to 1,142 feet. This is a typical beach ridge of sand and gravel, 

 about 30 rods wide, with the land next southeast 5 to 8 feet lower, and 

 diAaded from the secondai'y beach northwesterly by a slough about 1 mile 

 wide, this slough being at 1,115 to 1,105 feet. 



