T.4 THE PREGLACIAL DRAINAGE OF OHIO. 



■Ohio River and west of the Muskingum River has received 

 most attention, as within this area the most important changes 

 -of drainage have taken place. Only a limited amount of time 

 has been given to the section east of the JMuskingum, in the 

 Duck Creek and Little Aluskingum basins, so that scarcely more 

 than a few suggestions are ollfered concerning the modifications 

 which have there taken place. The entire area considered lies 

 far outside the glacial boundary of Professor G. F. Wright and 

 the only deposits of glacial material are the gravel trains along 

 the Ohio, Muskingum and Hocking and a few scattered erratics 

 which occur at various elevations on the inter-fluvial tracts. 



RELATION TO ADJACENT DRAINAGE. 



Immediately to the north of this region is a large area now 

 drained by the ]\Iuskingum. The preglacial drainage of this 

 northern part of the ]^Iuskingum River has already been traced 

 with considerable detail and the results published in the Bul- 

 letins of the Scientific Laboratories of Denison University, Vol- 

 ume VIII, Part 2, page 35 ; Volume IX, Part 2, page 33, and 

 Volume XI, Article VIII. In these reports it is shown that the 

 preglacial drainage consisted of a main stream which had its 

 head in the upper waters of the Tuscarawas and flowed south- 

 easterly past Dresden, Newark and into the present Scioto basin 

 near Lockbourne, south of Columbus. 



Into this main valley emptied many tributaries. Only three 

 •of these are of especial concern in this connection. They are, 

 first, the Wills Creek valley which heads directly north of the 

 Duck Creek basin and extends northward into the Tuscarawas 

 above Dresden. This valley has not as yet been studied and 

 it may be that the present valley is composed of several preglacial 

 elements. Wills Creek has a very crooked course and as far 

 as the data in hand now show, is an aggrading stream. It 

 presents many interesting features well worthy of more careful 

 study. Secondly, just west of the Wills Creek basin is 

 the portion of the Muskingum River from the north Morgan 

 county line to Dresden. It is shown in the works already 

 referred to that this section of the Muskingum is reversed and 

 "that in preglacial times there was a col on the Muskingum at 



