46 BULLETIN OF THE LABORATORIES 



Blue Rock the valley becomes a veritable gorge and it is with 

 difficulty that the railroad has constructed its roadbed. There 

 are many characters which make it evident that an old col oc- 

 curs at this point. 



At McConnelsville the bluffs facing the river rise almost 

 vertically 3 50 feet, 1 104 feet A. T. The valley is about one quarter 

 of a mile wide and the river is running on a rock bottom. The 

 river here is only 65 feet below its level at Coshocton while it is 

 nearly loo feet above the bottom of the well in the ancient val- 

 ley at Hanover. The general rock surface as represented by 

 the adjacent table lands is at least 481 feet above the rock floor 

 of the valley at Coshocton. 



It thus becomes evident that the preglacial drainage of the 

 the Tuscarawas and upper Muskingum was not south along its 

 present course below Dresden. The fact that the general rock 

 surface of the country rises as we pass to the south shows that 

 this drainage line has cut its way into this plain by cutting down 

 the margin of a basin. 



At Dresden the hills rise 300 feet above the river and give 

 a beautiful view of the broad valley of the Muskingum above 

 that portion of the Muskingum so noted for its rich farms that 

 its reputation has extended to the whole Muskingum, and has 

 left the general but erroneous impression that the valley of the 

 Muskingum was of this broad and open character throughout 

 its entire length. The view from these same hills shows the 

 broad preglacial valley passing on to the west, a continuation of 

 that of the Muskingum, no less rich in its broad acres of bottom 

 land, but one looks in vain for the river which should occupy 

 it. There is seen coming in from the west the small stream, 

 Wakalomaka creek, of insignificant dimensions compared to 

 this great valley. Following up this creek to the west, to a 

 mile beyond Frazeysburg, it turns squarely to the north and 

 enters the hills. Following along the line of the P. C. & St. 

 L. Railroad for a few miles beyond the swamp M, there is pre- 

 sented now a heavy grade and then a great cut into the heap of 



