THE EIGHTH OE FEEGUS FALLS MOEAINE. 161 



between the Dovre and Fergus Falls moraines, and there are small areas 

 of undulating- or nearly level gravel and sand associated with these kames. 

 With these exceptions, all the expanse there and southward between the 

 Dovre moraine and the area of Lake Agassiz consists of smoothly undu- 

 lating intermorainic till. A similar sheet of till also occupies the area 15 

 to 20 miles wide inclosed on the north between the sides of the morainic 

 loop, from Tower City and Oriska to Page City, Hope, and Sherbrooke. 



From sections 36, 25, and 26, township 139, range 57, the Fergus 

 Falls moraine takes a north-northwest course through section 14 in this 

 township, there and onward forming morainic hills 20 to 60 feet high, 

 strewn with abundant bowlders, to the Northern Paciiic Railroad. Alta 

 station (having a side track for trains to pass each other, but no depot) is 

 situated near the middle of the morainic belt, which there has a width of 

 about 2 miles, consisting of very irregular drift hills 25 to 75 feet high, 

 with many bowlders. Thence the moraine extends nearly due north about 

 40 miles, with a width that varies from 1 to 3 miles, lying 2 to 8 miles east 

 of the Sheyenne River, and forming the watershed between the Sheyenne 

 and the Maple, to Pickert post-office, in section 7, township 146, range 56, 

 6 miles west of Sherbrooke. It is especially well developed and incloses 

 several lakelets in the west half of township 141, range 57. It also occu- 

 pies almost the entire west half of the next township northward, and in 

 its northwest corner is interlocked with a reentrant angle of the Dovre 

 moraine. Beyond this it runs slightly to the east of north, passing with a 

 width of about 3 miles through the middle of the north half of township 

 143, range 57, and onward through sonthwesterh Steele County, where it 

 lies 6 to 9 miles west of Hope and Sherbrooke. The morainic knolls and 

 hills along this distance rise commonly 20 to 60 feet above the smoothly 

 midulating till on each side. 



Massive hills of Cretaceous shale, overspread with a smooth surface of 

 till, are fonnd in Barnes County, both west and east of the moi'aine, 5 to 10 

 miles north of Valley City and Alta. The largest of these hills or swells 

 extends nearly 4 miles from south to north in sections 32, 29, 20, and 17, 

 township 141, range 58, close east of the Sheyenne RiA^er, above which it 

 rises about 275 feet. Its height above the Glacial flood-plain of the Shey- 

 emie, a nearly level tract of gravel and sand on the east, about 3 miles 



ilON XXV 11 



