UNION MORAINE. 479 



Great Miami and Stillwater rivers, about 4 miles west of Piqua, the moraine 

 assumes the form of a continuous ridge with gently undulating surface and 

 holds this form westward to Delaware County, Ind. The majority of the 

 swells have a height of 15 feet, but there are occasional swells that reach 

 20 to 30 feet. 



The chains of ridges in Delaware County which connect this moraine 

 with the Mississinawa are less easily described than the more closely aggre- 

 gated portions of the moraine. The southernmost ridge of the outer chain 

 bears away from White River, near Selma, curving around from a westerly 

 to a northwesterly trend. It has a width of about one-half mile and a 

 length of nearl^^ 2 miles, its northwest terminus being in the northwestern 

 part of sec. 6, T. 20, R. 11 E. Its highest points stand 25 to 30 feet above 

 the bordering plains, while its general elevation is about 20 feet. 



About a mile west of the northwest end of the ridge just described is 

 the southwest end of an esker belt which trends north-northeast to south- 

 southwest, and which is traceable from the borders of the Mississinawa 

 moraine to this point. A desciiption of this esker belt appears below. It 

 terminates in a plain, the nearest morainic features being a ridge whose 

 northern end, as noted above, lies a mile to the east. About 2 miles to 

 the west is a ridge which probably constitutes the continuation of the 

 moraine. It is nearly 2 miles in length and leads from sec. 27, T. 21, R. 

 10 E. northward to Killbuck Ci'eek, in section 15 of the same township. At 

 the northern end it makes a curve to the northwest. Its width is about 

 one-fourth mile and its height 20 to 30 feet. Its surface has a gentle swell- 

 and-sag topography. As already noted, no continuation of this ridge was 

 found either to the north or west. 



Passing to the inner line, we find it consisting in part of short ridges 

 with east-southeast to west-northwest trend, among which there are small 

 conical swells, and in part of a swell-and-sag tract free from distinct ridging. 

 These ridges display a somewhat peculiar arrangement in the eastern part 

 of Delaware County, in that they lap past each other and yet constitute but 

 a single chain, a given ridge having its western end north of and extending 

 slightly beyond the eastern end of its neighboring ridge on the west, indi- 

 cating that its production was somewhat later than that of the ridge whicli 

 it overlaps. From sec. 33, T. 21, R. 1 1 E., northwestward to the Mississinawa 

 moraine there are no well- defined ridges; but there is, thi'oughout much of 



