THE PREGLACIAL DRAINAGE OF OHIO. 21 



The valley of Duck Creek resembles much that of the Little 

 Muskingum. The lower part of the valley is much broader and 

 the hills more rounded than in the middle and upper sections. 

 This lower course has the appearance of recent occupancy by a 

 larger stream than originally cut the valley. This fact associ- 

 ated with some of the features farther up the valley suggests 

 that there have been several modifications of the streams but 

 they have not been fully worked out and are left with question 

 marks on the map. The suggestions indicated on the map wdll 

 serve as a working formula for further investigation. 



CHARACTERS OF THE WOLF CREEK AND DITTLE HOCKING VALLEYS. 



Wolf Creek heads in northern Morgan county on the divide 

 which was crossed by the Muskingum when; it broke over into 

 this basin. It flows soutward many miles closely parallel to the 

 Muskingum, much as the Little Muskingum parallels the Ohio. 

 Its valley is narrow and deep. It broadens gradually to- 

 wards the south of the point where it turns eastward when 

 it narrows rapidly to the col a few miles above its 

 mouth. Near the mouth of the valley; just above the junc- 

 tion of its South Fork there is an old deserted ox bow of con- 

 siderable interest. This ox bow seems to have been cut off at 

 the time the flood waters cut out the col above. The valley is 

 quite narraw at the cut off, The hill which occupies the center 

 of the ox bow rises almost as high as the surrounding general 

 surface. Below the mouth of the South Fork the valley is very 

 broad and the hills more rolling. 



This valley does not seem to have ever been cut down to 

 the level of the deep channel of the Muskingum. It seems as 

 though the lime stone stratum which forms the floor of the 

 valley at its mouth had prevented the valley from becoming well 

 graded to the level of the deeper channels of the larger streams. 



The valley of the South Fork of Wolf Creek is very markedly 

 different from that of the main creek. Throughout most of its 

 length this valley is comparatively broad and open and bounded 

 by more gently rolling hills. At places the walls are rather 

 steep but that is the exception rather than the rule. In the 

 upper waters the contrast with the head water features of the 



