UNION MORAINE. 487 



At Swayzee the drift has a thickness of 22 feet and is mainly till. At 

 Switzer the thickness is 28 feet and mainly till. At Sycamore Corners the 

 drift at the gas well, as reported by the driller, consisted of 15 feet of 

 yellow and blue till, beneath which was 50 feet of gravel resting upon the 

 rock. At Greentown the thickness of the drift in the gas boring is 86 feet; 

 the exact section was not obtained. At Wawpecoug, in Miami County, the 

 di'ift is mainly till, and rock is struck at about 70 feet. 



A gas boring at Bunker Hill, on ground slightly below the level of the 

 station, penetrated 68 feet of drift, of which the upper 40 feet is till, and 

 the remainder sand and gravel with thin beds of till. A well for water 

 a short distance southwest of Bunker Hill has 84 feet of drift. Along Pipe 

 Creek, within a mile below Bunker Hill, there are rock outcrops, but the 

 valley is about 100 feet deep, and the altitude of the outcrops is nearly the 

 same as that of the rock surface in the gas boring at Bunker Hill. 



Along the southeastern portion of this feebly ridged belt bowlders are 

 not a conspicuous feature, but in northern Howard and in Miami County 

 they are numerous, and especially so in sees. 11 and 14, T. 24, R. 4 E., and 

 east from these sections to the head of Deer Creek, which is in the ridged 

 belt. The majority of the bowlders are large, 2 to 4 feet in diameter, and 

 nearly all are of Canadian derivation. 



STEI.ffi. 



The observations of striae in the district comprised between the Union 

 moraine and the next moraine to the north, the Mississinawa, are restricted 

 to two in northern Logan County, Ohio, and to a single locality in Indiana. 

 Nearly every rock oiitcrop was examined, but the surface is usually rotten 

 and weathered to such an extent that striae could not be detected had they 

 once been present. 



In quarries in the northeast part of Belle Center, Ohio, there are striae 

 bearing S. 10° W. They consist of very iine lines, confined to the promi- 

 nent portions of the surface. 



At a quarry one-half mile southwest of Richland, Ohio, there are striae 

 bearing S. 25° W. Here, as at Belle Center, they consist of fine lines, and 

 are restricted to the prominent portions of the surface. 



The observation in Indiana is at Alexandria, in Free's quari-y, on 

 Pipe Creek, just west of the railway bridge. The bearing is S. 39° W- 

 (magnetic). 



