476 J. K Todd— Revision of the Moraines of Minnesota. 



places reaches an altitude of 1750 feet, while upon the divide 

 north of Lake Bemidji it is very little over 1400. This dif- 

 ference in level may account for the remarkable extension of 

 the Lake Superior lobe toward the northwest. This we con- 

 nect with the moraine running east of Shell Lake in Becker 

 County and more distinctly developed south of Pine Lake and 

 in northern Todd County. In the northeastern corner of that 

 county it changes from an easterly direction to one due south, 

 and includes the morainic accumulations west and east of St. 

 Cloud. Its further development we do not venture to indicate. 



The western lobe seems to have continually receded more 

 rapidly than the eastern, and w r e find again the short portion of 

 a moraine — the Seventh — joining the lower Herman or Norcross 

 Beach of Lake Agassiz in township 150-40. From that point 

 it runs eastward south of Red Lake, probably connecting with 

 a moraine along Big Fork in its eastern course north of Bow 

 String Lake, though it has not been clearly traced. Corre- 

 sponding in time to this is a moraine found running between 

 Turtle Lake and Lake Bemidji, thence curving southwest, 

 south to southeast through eastern Hubbard County and 

 western Cass County to Gull Lake near Brainard. 



There is lying approximately parellel with this a moraine 

 passing north of Cass Lake, crossing the Mississippi east of 

 Lake Bemidji, thence curving toward the south and southeast, 

 forming a prominent reentrant angle on the south side of 

 Leach Lake. Thence it runs west of south and joins the 

 moraine just mentioned near Gull Lake. Both of these united 

 are believed to correlate with the morainic ridges of inter- 

 lobular character which lie in Crow Wing and Morrison 

 Counties, the elongated portion trending northeast in northern 

 Kennebeck County, also the ridges in the southern part of the 

 same county and on the south line of Pine County. The dis- 

 tinctly double character of this moraine at its northwestern 

 extension seems to be a result of the unusual elongation of the 

 lobe in that direction. It may be stated also that this seventh 

 moraine shows an indistinct double character. 



During the formation of the Eighth, or Mesabi, moraine, 

 we conceive that the two ice lobes had become separated to an 

 indefinite extent, at least beyond the borders of Minnesota, 

 and were forming between them the Mesabi moraine. If we 

 are correct in this supposition, the moraine before mentioned 

 along the Big Fork must have been extended south-eastward so 

 as to connect with the Mesabi. At this stage for some reason 

 the push of the northern ice lobe seemed to have been more 

 strongly southward toward the east; while the southern ice 

 lobe, as in the preceding stage, still pushed strongly northwest. 

 A reason for this may be found in the much steeper slope on: 



