420 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



BO%VXDERS. 



This morainic system does not have such long-continued distinct belts 

 of bowlders as characterize the equivalent system of the Miami lobe, but it 

 is nevertheless liberally strewn with them throughout the greater part of its 

 course. The number on its surface is markedly greater in the till tracts 

 than where gravel predominates, though not rare in the latter situation. 

 Wright has mentioned some of the larger ones that have been discovered. 

 One at Buck Ridge, west of Canton, measured 55 by 46 by 18 inches. 

 Another, on the bluffs of Tuscarawas River, near Navarre, measured 7 by 5 

 feet and is 3 feet out of the ground. In section 14, Hardy Township, east 

 of Millersburg, is a bowlder 7 by 5 feet, projecting 3 feet above the surface. 

 Near Oak Grove Nursery, west of Millersburg, at an altitude 430 feet above 

 Killbuck Creek, is a granite bowlder 10^ by 6^ feet, projecting 3^ feet 

 above the ground. In the valley of Baldwins Run, between Lancaster and 

 Pleasantville, a granite bowlder, mentioned by Andrews, of the Ohio survey, 

 as well as by Wright, measures 18 by 12 feet, 6 feet out of the ground. It 

 is described as hornblendic in character. In section 14, Colei-ain Township, 

 Ross County, near the residence of Isaac De Long, Wright reports several 

 bowlders 6 by 8 feet in diameter. At D. H. Pricer's, on an elevated upland 

 north of Bainbridge (altitude about 550 feet above Paint Creek Valley), 

 a bowlder of hornblendic rock 5 by 3 by 2 feet is reported. 



Bowlders of the sizes mentioned by Wright are exceptional, the great 

 majority being but 1 to 3 feet in diameter. They are mainly Archean rocks 

 except at the border of the drift, where there are in many places masses of 

 local rocks which have been transported short distances by the ice sheet 

 and mingled with material derived from greater distances. Many such local 

 bowlders occur along the border of the shoulder east of Mansfield. The 

 largest ones of which measurements were taken are on Adam Berry's and 

 John Ferguson's land, about IJ miles northwest of Newville. A reddish 

 sandstone is represented by several bowlders 15 feet or more in greatest 

 diameter, whose thickness is 5 or 6 feet. A white sandstone bowlder was 

 found to measure 14 by 24 feet, and stands 3 feet out of ground; another is 

 18 feet square and has been qviarried down nearly to the ground; another, 

 near by, dips into the hillside at an angle of 45°. It was originally large, 

 but has been reduced greatly by quarrying. 



There are certain bowlders found in this i-egion which are of great 



