288 



F. Lever ett — Correlation of Moraines 



The moraine rises and falls in its course across Ohio showing 

 but little dependence upon levels, though there is usually a 

 slight southward curve at the lowlands and a reentrant or 

 northward curve on the highlands crossed by it. The follow- 

 ing table of altitudes will illustrate its great range. It em- 

 braces the portion between the Maumee river and the interlo- 

 bate tract in Geauga count}'-, Ohio. 



Table of Altitudes along the JBlanchard Moraine. 



Stations. 



Altitude A. T. 



Remarks. 



Near Defiance, 



730 



feet. 



Wabash R. R.. profile. 



Pleasant Bend, 



742 



u 



T. St. L. & K. C. profile. 



Summit S. of Leipsic, 



780- 



■85 feet. 



Bar. from W. Leipsic. 



Summit S. of McComb, 



795- 



■800 " 



" " McComb. 



Summit 1ST. of Findlay, 



840- 



■850 " 



" " Findlay. 



Alvada. 



850 



1! 



Geol. of Ohio, vol. vi. 



Sandusky river bluff, 



830 



" 



Bar. from Tiffin. 



Near Rockaway, 



900 



it 



Bar. from Attica. 



Attica, B. & 0. R. R., 



963 



a 



Diet, of Altitudes. 



Near Chicago Junction, 



950 



u 



Bar. from Chicago Junct. 



Near New London, 



1050 



ii 



" " New London. 



2 mi. N. E. of Troy (Nova P. 0.), 



1182 



u 



Prel. Surv. P. A. & W. R. R. 



Lodi, 



910- 



■925 " 



Bar. from station. 



Chatham (1 mi. N. of Center), 



1120 



" 



Bar. from Litchfield Sta. 



Near Medina, 



1100 



" 



" P.A.&W. R.R.Sta. 



Near Remson's Corners, 



1200 



u 



" " Medina. 



Cuyahoga river bluff, 



950 



u 



" " Peninsula. 



Eastern Cuyahoga and western 









Geauga Counties, 



1000- 



1250 " 



" " various stations. 



From the interlobate tract in Geauga county westward to a 

 few miles beyond the meridian of Findlay this moraine, in its 

 topography and general appearance, is like other moraines 

 south of it, consisting of a broadly ridged and slightly undu- 

 lating tract of till standing 20-40 feet or more above the plain 

 south of it, and having a breadth of l£-3 miles. ]S ear the 

 meridian referred to it assumes a very different appearance 

 having a knob and basin topography of subdued type in which 

 knolls of conical form rise abruptly 5-10 feet and cover an 

 acre or less each, and among which are sharp basins occupying 

 usually but a small fraction of an acre each, though frequently 

 several feet in depth. The crest of the moraine is no longer 

 well defined though it continues to be a watershed between 

 tributaries of the Maumee all the way to that stream near 

 Defiance. On the accompanying map (fig. 2) an attempt is 

 made to represent this change in the topography. 



The structure presents as marked a change as the topog- 

 raphy. Instead of a uniform deposit of till at the surface 

 there is a variety of formations remarkable for the abruptness 

 of their alternations. In one knoll a fine sand may occur 



