THE GEOLOGY OF MINNESOTA. 



["Elevations. 



Station No. 494. Summit between Glenville and Albert Lea, 1313 



Station No. 654. Albert Lea (town plat), 1243 



Lake Albert Lea, 1201 



Station 1064. Summit at Clark's Grove, 1314 



Geneva lake (or Walnut lake) 1214 



Station No. 1330, at Steele county line, sec. 5, T. 1O4. R. 2O, 1206 

 Elevations obtained of George B. Woodworth, assistant engineer of the Southern Minnesota railroad, 



La Crosse. 



Miles from Feetabove 

 La Crosse. the sea. 



Ramsey, crossing Iowa and Minn.div. of Chicago, Milwaukee and St. Paul 



railway, 103.1 1214 



Depression, grade, 107.7 1197 



Oakland, 109.9 1265 



Summit, grade, 113.8 1270 



Depression, grade, 117.6 1241 



Hayward, 118.0 1248 



Summit, grade, 121.5 1263 



Depression, grade, 124.2 1206 



Albert Lea, 124.6 1221 



Burlington, Cedar Rapids and Northern crossing. 121.7 1220 



Summit, grade, 128.9 1323 



Armstrong, 129.8 1270 



Summit, grade, 133.5 1317 



Alden, 135.2 1261 



Bood's switch, 139.7 1189 



Wells, 144.4 1153 

 Elevations on the Minneapolis and St. Louis railway, from Robert Angst, assistant engineer. 



Miles from Feetabove 

 Minneapolis. the sea. 



Hartland, 94.9 1247 



Manchester, 100.9 12-58 



Albert Lea, 108.0 1224 



Twin Lakes, 115.0 1255 



Norman, 121.4 1279 



Average elevation of the county. The most of the county is more than 1 .209 feet above the 

 sea, the range being between 1,100 and 1,400, the average elevation for the county being about 

 1,250 feet. The average elevation of the different townships is about as follows, estimated from 

 the contour lines: Ne wry, 1.275 feet above the sea ; Moscow, 1,250; Oakland, 1,260; London. 

 1,225; Geneva, 1,240 ; Riceland, 1,240; Hayward, 1,240; Shell Rock, 1,260; Bath, 1,280; Ban- 

 croft, 1,290; Albert Lea, 1,250; Freeman, 1 ,250 ; Hartland, 1,225; Manchester, 1,275; Pickerel 

 Lake, 1,290; Nunda, 1,275; Freeborn, 1,175; Carlstou, 1,210; Alden, 1.260; Mansfield, 1,275. 

 The mean elevation of Freeborn county, derived from these figures, is approximately 1,250 

 feet above the sea. 



Soil. Throughout the county the soil depends on the nature of the 

 drift combined with the various modifying local circumstances. There is 

 nothing in the county that can properly be designated a limestone soil, or 

 a, -sandstone soil. The materials of which it is composed have been trans- 

 ported perhaps several hundred miles, and are so abundantly and univers- 

 ally spread over the underlying rock that they receive no influence from 

 it. The sub-soil is a gravelly clay, and in much of the county that also 

 constitutes the surface soil. In low ground this of course is disguised by a 



