MOKAINES CONTEMPORANEOUS WITH LAKE AGASSIZ. 147 



fully explored. Tlie mauy beaches of Lake Agassiz, all showiug an ascent 

 northward when compared with the level of |the present time, but with this 

 ascent gradually decreased during the successive stages of the lake, prob- 

 ably find their explanation in the manner of retreat of the ice in Canada, 

 interrupted there, as fartlier south, by pauses and the formation of moraines. 

 The following are notes' of the five moraines already mapped which 

 cross the expanse of Lake Agassiz, being conspicuous upon each side of 

 this lake, but faintly developed or lost on the lacustrine area: 



SEVENTH OR DOVRE MORAINE, 



The Dovre moraine is prominent in Stearns, Douglas, Pope, and 

 Kandiyohi counties, Minn. Its distinctive name is taken from its hills in 

 Dovi-e, Kandiyohi County, to which the southeast extremity of the Min- 

 nesota lobe of the ice-sheet had been withdrawn west-northwestward about 

 70 miles from Waconia during the interval between the sixth and seventh 

 moraines. In Pope and Douglas counties an area about 25 miles wide, 

 from Glenwood north to Miltona and Spruce Hill townships, was probably 

 uncovered by this glacial recession. But considerable portions of the ice 

 border in its general course at this time from east to west across central 

 Minnesota had receded only a few miles between these moraines. Indeed, 

 they seem to be merged together north of Richmond, in Stearns County, 

 and from Barsness, in Pope County, to Mount Tom, about 9 miles north- 

 northeast of the Dovre Hills. Again, in Big Stone County, a single belt 

 of somewhat rolling till, 5 to 8 miles wide, seems representative of the 

 Elysian, Waconia, and Dovre moraines combined. In the wooded countrj- 

 east from Little Falls, Minn., to the sources of the St. Croix River in Wis- 

 consin, this moraine has not been definitely traced.^ 



Crossing Richland and Sargent counties, in the southeast corner of 

 North Dakota, the Dovi-e moraine is well developed in knolls, hills, and 

 short ridges of till, covering a belt from a half mile to 2 miles in width, with 

 abundant bowlders and characteristically I'ough contour. On the south- 

 west side of Taylor Lake, near Hankinson railway station, these rough 



'Geology of Minnesota, Vol. II, pp. 642, 625, 581-585,605, 446-448,464, «5-478. 482-488 (including 

 a general description of the characteristic features of the terminal moraines of Minnesota), 224-226 

 [Dovre], 233, 213; and Vol. I, p. 621. (The ordei- of citation is geographical, from east to west.) 



