COURSES OF GLACIAL STEIJ3. 641 



real!}' have been westward, rather than eastward, due to dedection during the hite 

 stage of the glacial recession when the expanding Lake Agassiz caused the ice in 

 uorthwi'stern Minnesota to be melted away earlier than on the land area about the 

 sources of the Big Fork and easterly, so that the previous glacial currents of that 

 area might become reversed from eastward to westward courses. 

 The following striie are in central and southern Minnesota: 



Hinckley, Pino County S. and S. 5 ^ W. 



Watab, Benton County S. 15'^' W. 



Sauk Kapids, Benton County, numerous places S. 45 '-55" W. 



But in one place S. 15"^ W. 



Sauk Center, Stearns County, 40 miles west of the last S. 40^^ E. 



Minneapolis, several places S. 5°-28° E. 



One to 7 miles southeast from Big Stone Lake, numerous places SE. 



Granite Falls, several places S. 45°-50" E. 



Beaver Falls S. 60° E. 



In the valley of the Minnesota River, 2 miles below Birch Cooley S. 60" E. 



One and a half miles west of Fort Ridgelj- S. 60° E. 



Kedstone, near New Ulm S. 25° E. 



Jordan, at mill of Foss, Wells & Co SE. 



Posen, Yellow Medicine County S. 50° E. 



Echo, Yellow Medicine County S. 50°-55° E. 



Township 111, range 38, Redwood County S. 50°-60° E. 



Stately, Brown County S. 50°-55° E. 



Germantown, Cottonwood County S. 30° E., S. 50° E., and 70° E. 



Amboy, Cottonwood County, mostly S. 35°-50° E. 



But also rarely deflected to S. 70° E. 



[In one place all these courses intersect on the same surface.] 

 Delton, Cottonwood County, numerous localities, mostly S. 15°-40° E. 



Also, in one place, all courses from S. to S. 80° E. 



[These intersect on the same surface.] 



Selma, Cottonwood County S. 18°-22° E. 



Amo, Cottonwood County S. 30°-32° E. 



Dale, Cotton wood County S. 20°-34° E. 



Adrian, Watonwan County S. 20°-30° E. 



The only glacial striie recorded in North Dakota are on outcrops of a bluish-gray 

 sandstone, occupying the place of the Fox Hills sandstone, on the Willow liiver, in 

 the southwest quarter of section 35, township 1(51, range 73, about G miles south from 

 Dunseith and the southern base of Turtle Mountain. Distinct glacial furrows and 

 stri;e, here observed in eight or ten places, bear mostly due west, but in two places 

 S. 85° W. and S. 75° W. These striic belong to the closing stage of glaciation here, 

 being directed normally toward the Fergus Falls and Leaf Hills moraines and the 

 glacial Lake Souris, whose eastern shore coincided nearly with this part of the course 

 of Willow River. During the maximum extension of the ice-sheet its current at this 

 locality doubtless passed nearly due south. 



Almost universally throughout North Dakota, eastern Montana, and a large area 

 stretching thence northwestward to the Athabasca and Peace rivers, the bed-rocks 

 MON XXV 41 



