96 T. C. Chamberlin— Correlation of Terminal Moraines. 



to the glacier. The northerly part of this belt is such an in- 

 termediate moraine, formed between the Scioto and Gran! 

 Eiver glaciers. The moraine proper to the Grand River 

 glacier diverges from this common intermediate one in the 

 north central part of Stark Co., from which point it curves 

 rapidly to the eastward, and passes into Columbiana Co. in 

 West and southern Knox townships. Thence it passes east- 

 ward in an undulating course through the northern portion of 

 Columbiana Co., from which it enters Pennsylvania, The 

 hitter state being tnd< r iim stigation, the course of the moraine 

 was not pursued by me further than to determine its general. 

 northeasterly direction and persistence. This latter portion 

 marks the left hand margin of the e/lneial lobe. 



These determinations are thoroughly in harmony with, and 

 bring into rational unity the interesting observations of Mr. 

 M. C. Bead,* on the direction of glacial striatum in northeast- 

 ern Ohio. Indeed my working hypothesis was based upon 

 them. These striations show a remarkable divergence from 

 the axis of the Grand River valley toward the high lands that 

 form its rim, and, as it proves, toward the margin of the glacial 

 lobe that gave rise to them. This conforms to the law of di- 

 vergent internal movement, first demonstrated by myself in 

 respect to the Green Bay glacier, and since shown to be a gen- 

 eral character of the glacial lobes of the interior, and will 

 doubtless prove to be a uniform feature of glaciers deploying 



n uj!,] .1 the on!? ii« i is ifnrtm 1 b\ the observa- 

 tions of Dr. Newberry, on Columbiana Co.,f who asserts that 

 the drift is conlined to the northwestern portion of the county, 

 and of Professor J. J. Stevenson on Carroll Co.,^; who says 

 that after diligent examination, no drift was found except a 

 few doubtful specimens in the northeast, and that the boundary 

 line of drift influence lies to the north and northeast of the 

 county. 



The outer margin of the moraine, according to my determi- 

 nation, approaches to within less than three miles of the 

 northern line of Carroll Co., and r observed no apparent evi- 

 dence of glaciation south of it. A little farther east, however, 

 drift was observed from three to four miles south of the ap- 

 parent margin of the moraine. Whether this was formed con- 

 temporaneously with the moraine or during the earlier glacial 

 epoch, seems to me uncertain, but the general fact that the 

 moraine here reaches the essential limit of the drift-bearing 

 area, is satisfactorily determined. This removes one of the 



* Geol. Survey of Ohio, vol. i, p. 531. 



fGeol. Survey Ohio, vol. III. p. DO. % Ibid, p. If 9. 



