360 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



It is very strongly developed along the valleys also, and since these valleys 

 trend nearly at right angles with the general course of the moraine they 

 present the appearance of spurs leading northward from the moraine. 



The most conspicuous of these valley belts noted leads from New 

 Madison northward past Fort Jefferson nearly to Greenville. It includes 

 gravel ridges which have the outline of eskers, but they are interrupted at 

 frequent intervals and replaced by sharp morainic knolls; consequently it 

 seems legitimate to consider them as part of the moraine. The highest 

 knolls and ridges rise 50 to 60 feet above the bordering low ground, but 

 the majority are but 15 to 25 feet in height. The topography from this 

 valley-morainic belt eastward is markedly smoother than it is to the west- 

 ward, much of it being nearly level. In this eastern district basins are 

 usually numerous. They are small, being but 3 to 6 feet in depth, and 

 occupy only an acre or so each. A short distance east of Fort Jefferson 

 the inner border of the moraine turns abruptly southward and follows 

 Millers Fork of Twin Creek, passing through Ithaca and just east of West 

 Sonora and Euphemia. This portion of the moraine contains only low 

 swells 10 feet or less in height, but its surface is all more or less undulatory. 

 Near Euphemia the moraine leaves Twin Creek and bears eastward past 

 Pyrmont and Air Hill, having in this portion of its c<)urse numerous swells 

 8 to 10 feet in height, which, though low as compared with those in some 

 portions of the moraine, present a sufficiently strong contrast to the flat 

 tracts on the north to make it easily traceable. From Air Hill the moraine 

 passes northeastward, crossing Stillwater River near Little York. It con- 

 sists mainly of low swells 8 to 10 feet in height, but on the west bluff of 

 Stillwater River, about a mile northeast of Taylorsburg, a chain of sharp 

 gravelly knolls and ridges occurs, whose highest points stand 30 to 40 feet 

 above the bordei'ing portions of the moraine. The chain trends with the 

 moraine in a northeast-southwest course. In Stillwater Valley there is, 

 near Little York, an undulatory lowland standing about 70 feet above the 

 river, on which a slight capping of till and numerous bowlders occur, with 

 heavy beds of gravel beneath. 



On the uplands between Stillwater and the Great Miami the moraine 

 has feeble expression, with swells only 5 to 10 feet high, but is very 

 liberally strewn with bowlders, and the bowlders also abound northward 

 over the bordering plains. In the Great Miami Valley, just below Tippe- 



