566 THE GEOLOGY OF MINNESOTA. 



[Elevation*. 



Miles from Feet above 

 \\ inona. the .* 'ti. 



Springfield 193.18 1025 



Sanborn 201.56 1089 



Lamberton 208.77 1144 



Walnut Grove 218.98 1223 



The elevation of the Minnesota river along the north side of these counties, at its ordinary 

 stage of water, 20 to 25 feet below its high floods, is approximately as follows: 



Minnesota river, low water. 



Feet above 

 the sea. 



At the northwest corner of lied wood county 845 



Below Patterson's rapids, at the east side of Swede's Forest 820 



At the mouth of the Redwood river 810 



At the Hue between Redwood and Brown counties 798 



At Fort Ridgely 793 



At New Ulm 784 



At the mouth of the Big Cottonwood river 782 



At the east line of Brown county 778 



The Redwood river enters Redwood county at a hight of nearly 1,100 feet above the sea, 

 and its descent in twenty-four miles to Redwood Falls is some 150 feet. Thence to its mouth, 

 in three miles, it falls about 140 feet, the greater part of this descent being in less than a half 

 mile at Redwood Falls. 



At the west line of Redwood county the Cottonwood river is about 1,120 feet above the sea, 

 and it leaves this county and enters Brown county at an elevation of about 1,030 feet. Its hight 

 at Iberia is estimated to be 900 feet, and at its mouth, as already stated, approximately 782 feet. 

 The Little Cottonwood crosses the south line of Stately, entering Brown county, at a hight 

 of about 1,150 feet above the sea. In the central part of this county, two miles south of Jberia, 

 its hight is estimated to be 960 feet; at the east line of Sigel, 900 feet; and at the east line of the 

 county, 825 feet. 



Brown county has its highest land upon the northern slope of the ridge 

 of red quartzyte at the south side of sections 31, 32 and 33, of Stately, its 

 most southwestern township, which reach to 1,200 or 1,250 feet above the 

 sea, 200 feet higher than the Cottonwood river at the north side of this 

 township, but 100 feet or more below the top of this ridge, a mile farther 

 south. The lowest land of this county is where the Minnesota river leaves 

 it, about 778 feet above the sea. The average hight above the sea-level of 

 the townships of Brown county is estimated as follows: New Ulm city, 

 875 feet; Cottonwood, 950 ; Linden, 1,020; Milford, 950; Sigel, 990; Lake 

 Hanska, 1,030; Home, 1,000; Stark, 1,000; Albin, 1,040; Eden, 990; Prairie- 

 ville, 1,040; Leavenworth, 1,020; Mulligan, 1,060; Burnstown, 1,040; Bashaw, 

 1,090; North Star, 1,060; Stately, 1,150. From these estimates the mean 

 elevation of this county is found to be approximately 1,025 feet. 



The highest land of Redwood county is the southwest part of Spring- 

 dale, its most southwestern township, about 1,400 feet above the sea, being 

 some 300 feet above the Cottonwood river ten miles distant to the north, 

 and about 600 feet above the lowest land of this county, the shore of the 



