156 GLACIAL FOEMATIONS OF ERIE AND OHIO BASINS. 



A well about 1 mile east of Hauover is reported by Tig-lit to have reached 

 a depth of 218 feet without striking the old rock floor of the valley, though 

 the bottom of the well is about 150 feet below the present level of the 

 Muskingum at Dresden, or but 550 feet abo^^e tide. It is 50 feet or more 

 below the level of the rock floor of the present Muskingum at points 30 to 

 40 miles below Dresden. At Newark the old valley was cut to a level 

 about 250 feet below the present river, or to less than 550 feet above tide. 

 Gas wells at Hadley Junction and other points along the old line between 

 Hadley and the 'Scioto River also reach a similarly low level before 

 encountering rock. 



THE PRESENT LINE OF DISCHARGE. 



Turning now to the present course of the Muskingum below Dresden, 

 we find a much narrower valley than the old channel of discharge, the 

 width ranging between one-half and three-fourths of a mile in the first 25 

 miles below Dresden. It there grows narrower, and in the vicinity of the 

 line of Muskingum and Morgan counties, 33 miles below Dresden, it is less 

 than one-fourth of a mile in width and is bordered by abrupt bluff's 200 to 

 250 feet in height. This is the narrowest place on the lower course of the 

 river and is apparently the site of an old divide. The valley, however, 

 remains narrow nearly to the mouth of the stream, its measured breadth at 

 Lowell, 12 miles above the mouth, being barely one-half mile. 



No data concerning the elevation of the rock floor in the portion of the 

 valley between Dresden and the supposed old divide have been obtained; 

 but at Eaglesport, about 3 miles below the supposed divide, a gas well on 

 the east side of the river about midway between the bluffs entered rock 30 

 to 35 feet below low water, or about 615 feet above tide. Another boring 

 at McConnelsville, 7 miles farther down the valley, is reported to have 

 entered rock 50 feet below low water at that point, or 590 feet above tide.^ 

 The rock floor here seems to be about as low as at Lowell, 35 miles farther 

 down the valley, the dam at Lowell being built upon the rock floor in the 

 middle >part of the valley which there stands at 580 to 590 feet above tide. 



Concerning the height of the supposed divide above Eaglesport, there 

 is good evidence from the contours of the bluff that it did not exceed 900 

 feet above tide, for the bluffs rise abruptly in this constricted portion to a 



' Data concerning the borings at McConnelsville and Eaglesport were obtained from Dr. H. L. 

 True, of McConnelsville. 



