DEVILS HEART HILL. 157 



appears referable to the Fergus Falls and Leaf Hills moraines. At this 

 intersection there is heaped the largest and moS^^ remarkable kame that has 

 ever come imder my observation, known by its aboriginal appellation as 

 the Devils Heart. This mound of gravel and sand appears to have been 

 deposited where a glacial river descended from the convergent slopes of 

 the ice-sheet to the open land contemporaneously with the accumulation 

 of the Dovre moraine. 



Devils Heart Hill rises in steep slopes of 20° to 30^, being thus steep 

 on all sides excepting the south, where the othei'wise nearly round-top])ed, 

 conical hill is somewhat drawn out into a nan-ow, more slowly descen<ling 

 ridge. It consists of gravel and sand, mostly not showing pebbles on the 

 surface larger than IJ inches in diameter. A few bowlders, however, a 

 score or more in all, are seen on the sides of this hill to its top, and one 

 a foot long- (the only one seen at the crest) is embedded in the gravel a 

 rod south of the highest point and less than 1 foot lower. The gravel is 

 of threefold origin, being derived in about equal proportions from granitic 

 and gneissic Archean rocks, froui the Silurian limestones, and from the 

 Cretaceous shales. Nearly all of the bowlders seen on the hill are granite 

 or gneiss, but two or three on its west side are limestone. It is situated in 

 section 4, township 151, range 64, about a mile southwest from the head of 

 Donahues Bay of Devils Lake. Its height above its base is about 175 

 feet, and above Devils Lake, according to Nicollet's barometric deterinina- 

 tiim, 290 feet, which appears to be about 15 feet higher than Sullys Hill, 

 the culminating point of the verv prominent hills of morainic till south of 

 Devils Lake. From the altitude of the lake, 1,430 to 1,434 feet above the 

 sea, as known by railway surveys, the top of the Devils Heart is approx- 

 imately 1,722 feet, and of Sullys Hill, 1,707 feet, above the sea. 



The Do^^■e moraine is blended with the later Fergus Falls and Leaf 

 Hills moraines from the Devils Heart northwest and west by Fort.Totten 

 and the Crow Hills to the northwest part of township 151, range 66, in the 

 west edge of the Indian reservation, where it again Ijecomes a separate belt. 

 Thence it passes in a general west-northwestward course along tlie north 

 side of the Antelope Valley to the area of the glacial Lake Souris. Imme- 

 diately north of Oberon its very irregular knolls, hills, and small short 



