THE PREGLACIAL DRAINAGE OF OHIO. 59' 



cier's burden blocked the way. What a game of shuttle-cock 

 must have been played between the debris of their floods, and the 

 deposits in the coal marshes, from the frequent oscillations of 

 land and sea during this aeon of time; and how this shifting of 

 debris and growth must have modified the course of the current 

 at different times! And when we think of the corrosive influ- 

 ence of the atmosphere, and the erosiv power of the streams, 

 we will not wonder at the great width and depth of the main 

 drainage troughs noted above, nor at the occasional dove-tail- 

 ings of the Waverly and the Coal Measures conglomerate that 

 throws a shadow over the course of the mutual outlet for their 

 waters. 



Furthermore, not only was this water way obscured, but 

 the entire face of the plateau was transmuted. Erosion had so 

 marred its features, and glacial drift so deformed them, that my 

 first examination was faulty and I must add to, and explain, 

 the elevations noted in the early part of the paper. The line of 

 highest hills there noted marks the present divide between 

 Lake Erie and the Ohio river, but not the pre-glacial divide 

 marking the crest of the Waverly. I found it to be south, and 

 east of this line of hills. Entering Wayne county south of West 

 Salem, it passes across Congress township about two miles south 

 of Congress village, and crosses the Killbuck one mile north 

 of Cedar Valley (now Overton) and entering Wayne township- 

 it intersects a north and south divide from Burbank to Wooster 

 in such a manner as to almost present the picture of a turkey's 

 foot, the central toe — the continuance of the continental divide — 

 extending across Wayne township to Green and ending at Smith- 

 ville. The right toe, being represented by a range of hills that 

 run southeast to Wooster, where Wooster University is located 

 on the extreme front, 172 feet above the city's square. From 

 these two points the descent of the Waverly is very rapid until it 

 disappears under the Coal Measures. The elevations of these 

 spurs are, above 'Wooster 640 feet, above Smithville 700 feet, 

 and the rock is badly crushed. The projection of the third 

 toe is disgramed by a line of high elevations running from the 

 heel at Cedar Valley, northeast across Canaan township, and 

 almost paralleling the middle division of Killbuck valley — tcv 



