OP DENISON UNIVERSITY. 29 



towards the Scioto. The fact that this valley was not produced by the 

 action of its present stream was early recognized by Dr. Edward Orton 

 for in his report of Ross county, Ohio Geological Survey Vol. II, page 

 642, he says: " East of the Scioto, and in the southeastern corner of 

 the county, Salt creek flows in an old and deeply excavated valley." 



Time did not permit the examination of this valley its entire length 

 but it seems very probable that some connection may exist between 

 this valley and the drainage basin of Raccoon creek. The location of 

 the col on Symmes creek as shown on Plate III was made entirely from 

 the map study and was not verified in the field so that it is only tenta- 

 tively placed. The northward direction of all the tributaries and es- 

 pecially that of Sand creek is very suggestive of the fact of the reversal 

 of drainage and was the principal factor considered in locating the col. 



6. CORRELATION OF THE DRAINAGE AND TOPOGRAPHIC FEATURES. 



The reconstruction of the old drainage lines of the region seems 

 very plain. The main axis of drainage was the Big Kanawha, with its 

 head waters, in New River, in the old land of the Blue Ridge, it 

 crossed the low inland of the great Appallachian valley and the Alle- 

 gheny plateau along the line of the Teazes valley to the Ohio at Guy- 

 andotte. Here it received a tributary from the north along the line of 

 the Ohio which headed at near Millersport, also one from the south, the 

 Guyandotte river. Its course then conformed to that of the Ohio to 

 the mouth of the Big Sandy, thence it followed the Flat Woods valley 

 to Greenup where it again conformed to the present Ohio to Sciotoville. 

 At Greenup it received a tributary from the south, the Little Sandy. 

 At Sciotoville it also received an other southern tributary, Tygarts 

 creek, the lower portion of which conforms to a portion of the Ohio. 

 The main stream continued northward through the California valley to 

 Waverly where it received an other considerable tributary on its western 

 side which was made up of the waters of Salt Lick creek and Kinni- 

 conick creek continued along their normal directions along the reversed 

 Ohio and lower Scioto rivers. The great ridge which separates the 

 waters of Kinniconick creek and Tygarts creek then continued north- 

 ward right across the present Ohio just above Portsmouth into Scioto 

 county and formed the water shed between the main stream and this 

 last mentioned tributary at Waverly. The presence of this great drain- 

 age line along the California valley so close to the lower Scioto and this 



