OF DENISON UNIVERSITY. 1 9 



are sparingly represented in the form of boulders imbedded in the Coal 

 Measures of southern Ohio, makes it necessary to determine whether 

 they are of local or of distant derivation. The rarity of these bould- 

 ers in the Coal Measures, however, is such as to render it improbable 

 that the large number of quartzites lodged in the abandonded valley 

 could have been derived from the immediate vicinity. It seems far 

 more probable that they were brought by the Kanawha System of 

 drainage from extensive outcrops of such rocks on its head waters, no- 

 tably along New River. 



This abandoned valley forms a natural continuation of the old 

 Kanawha System, which, as shown some years ago by Prof. I. C. 

 White (Appendix to Wright's Glacial Boundary in Ohio. Western Re- 

 serves Hist. Socy. Cleveland, Ohio, 1884, page 84), and discussed 

 more fully later by Prof. G. F. Wright (Bulletin U. S. Geological Sur- 

 vey No. 58, 1890, pp. 86-88), discharged westward from near St. 

 Albans, W. Va , through the abandoned channel known as "Teases 

 Valley," to Huntington, W. Va., and thence down the present Ohio. 

 There is a slight departure from the present course just below the 

 mouth of the Big Sandy, near Ashland, Ky., where for a few miles it 

 passed through a broad channel lying just south of the present south 

 bluff. This channel back of Ashland was long since noted by Mr. Lyon 

 of the Kentucky survey, and afterwards described by Prof. E. B. An- 

 drews of the Ohio Survey. (Geology of Ohio, Vol. H, 1874, p. 441). 

 The course of these abandoned channels may be seen on the accom- 

 panying map, Plate H. 



The old rock floor of Teases Valley stands about 650 feet above 

 tide, or very nearly 150 feet above the present Ohio at Huntington. 

 The rock floor of the old channel, as preserved in numerous remnants 

 between Huntington and Wheelersburg, shows about the same rate of 

 descent as the present stream. At Wheelersburg it stands about 625 

 feet above tide. Following the abandoned valley north the rock floor 

 descends to about 600 feet at the point where it joins the Scioto, oppo- 

 site the city of Waverly. Teases Valley, and also the channel back of 

 Ashland, and the remnants along the border of the present Ohio, all 

 carry a deposit of rolled stones made up largely of quartzite, and sim- 

 ilar in every way to the deposits of the abandoned valley leading north 

 from Wheelersburg. 



In the portion of southern Ohio east of the Scioto, from the pres- 

 ent Ohio northward at least to the Hocking, the streams now directly 



