522 THE GEOLOGY OF MINNESOTA. 



[Elevationi. 



same above the general level on each side; and from 75 to 100 feet above 

 the Des Moines river, and 40 to 50 feet above lake Shetek. 



The only part of the second moraine in this county which rises in mounds that are conspic- 

 uously seen at a distance of several miles, is in the northeast corner of Murray township, upon 

 an area from a half mile to one mile wide, extending two miles northwesterly from Buffalo lake; 

 but its hills here are only 30 to 50 feet above the average hight of the range. Along the northeast 

 side of the northwest arm of lake Shetek, commonly called the Inlet, are frequent small patches 

 where boulders nearly cover the ground, mostly forming knolls from three to five or ten feet 

 high, and occurring from the lake shore to twenty-five feet above it. 



The portion of Murray county northeast of this second moraine is drained into the Cotton- 

 wood river. It consists of till, with a smoothly undulating or moderately rolling surface, the 

 highest parts being generally 10 to 30 feet above the lowest. The only considerable stream in 

 this northeast corner of the county is Plum creek, which has eroded a remarkable valley, 40 to 

 50 feet deep bordered by steep bluffs, sloping from 30 to 45, along a distance of five miles, from 

 the east side of section 18, Holly, to the black walnut grove which borders this stream in the 

 south edge of Eedwood county. This valley receives numerous short tributary ravines. 



Elevations, St. Paul & Sioux City division, Chicago, St. Paul, Minneapolis & Omaha railway. 



From profiles in the office of T. P. Gere, superintendent, St. Paul. 



o. Main line. 



Miles from Feet above 

 Si. Paul. the sea. 



Hersey (Brewster) 170.0 1485 



Elk creek, water 171.5 1473 



Summit, grade 178.2 1588 



Worthington 178.4 1582 



East Okabena lake, water 178.5 1569 



Junction of Sioux Falls branch 181.8 1633 



Summit, grade 182.3 1654 



Summit, grade, highest point on line from St. Paul to Sioux City. . . 184.6 1656 



Bigelow 187.8 1631 



State line 188.3 1643 



6. Black Hills division ( Woodstock branch). 



Dundee 168.4 1443 



Avoca 180.1 1533 



Summit, grade 201.1 1850 



Summit, grade 201.9 1849 



Murray and Pipestone county line, grade 202.5 1839 



c. Sioux Falls branch. 



Junction 181 .8 1633 



Summit, grade 184.5 1691 



Little Rock river, water 187.4 1629 



Little Rock river, bridge 187.4 1649 



Rushmore 190.1 1665 



Adrian 196.9 1538 



Kanaranzi creek, water 198.0 1499 



Kanaranzi creek, bridge 198.0 1511 



Summit, grade 199.5 1569 



Elevations, Southern Minnesota division, Chicago, Milwaukee & St. Paul railway. 



Miles from Feet above 

 La Crosse. the sea. 



De Forest 239.5 1446 



Fulda 246.1 1508 



lona 255.6 1608 



Summit 259.4 1705 



Entering Chanarambie valley 264.0 1634 



