528 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



'At Powell rock is struck at 70 feet, the drift being mainly till; but 

 at Jerome, on equally high ground west of the Scioto, there are quarries in 

 ravines in the midst of the moraine, the drift being only 25 to 30 feet thick. 

 At Westerville, which lies just south of the moraine, rock was struck in the 

 gas well at 94 feet. Wells on the moraine north of that village are onlj^ 30 

 to 40 feet deep and strike no rock. The well mouths in some instances 

 have an altitude 60 to 75 feet above Westerville, but it does not follow 

 that the drift is that much thicker than at Westerville, since the rock surface 

 may have a lower altitude at that village than beneath the moraine. At 

 Galena wells 50 feet deep do not reach rock, but at Sunbury, 2 miles 

 northeast, rock is at the surface at an altitude fully 40 feet above the level 

 of the well mouths at Galena. At J. N. Lawren's, 1 mile northwest of 

 Sunbury and at lower altitude than the quarry, a well 33 feet deep does 

 not strike rock. At Marengo wells 40 feet deep do not reach rock. They 

 scarcely reach the level of the base of the morainic ridge on whose crest 

 the village stands. 



Winchell gives a list of 28 wells in Delaware County in which the 

 drift ranges from 6 to 56 feet in depth. Of these 5 are sulphurous and 6 

 chalybeate. The remainder are mainly described as having "good water." 

 But few of these wells are on the moraine. The deepest well noted by 

 him along the line of the moraine is at Olive Green. This well, he reports, 

 penetrated blue clay to a depth of 40 feet and obtained no water.' 



Winchell has a list of 39 wells in Morrow County whose depth in drift 

 ranges from 4 feet up to 50 feet.^ Of these, 2 are chalybeate and 3 sul- 

 phurous, the remainder mainly "good water." From along the line of the 

 moraine no wells exceeding 30 feet in depth are reported. He makes 

 the statement ^ that gravel and sand are abundant in the eastern portion 

 of the county, but that it is not usual to find these materials in the drift in 

 the shale and slate area. This difference in structure noted by Winchell 

 depends upon the morainic distribution rather than upon the underlying 

 rock, there being sand and gravel in the main morainic system which 

 occupies the eastern part of the county, but not in the moraine under 

 discussion, which traverses its western portion. At the time this moraine 

 was forming the conditions of deposition seem to have been such as to 

 produce, as previously noted, a very small amount of sand and gravel 

 compared with that found in the main morainic system. 



'Geology of Ohio, Vol. II, p. 308. «0p. cit., p. 268. '^Op. eit., p. 269. 



