1 6 Bulhtui of Laboratories of Dciiisoii Univcr<.ity. [\"' xii 



was enabled to economize both time and labor in the prosecution 

 of field investigations Work that was takm up oriq^inally 

 merely as recreation has proved to be more than recreation in 

 that it has become intensely interesting study ,is well. 



Granville, Ohio, Mav, 1902. 



DESCRIPTION OF THE PLA IKs. 



I. A sketched map of (lie present drainage ill jiarls of K nux, i ,ickin<; and 

 Coshocton Counties, Ohio By an oversight the location I'l Mi. Vernon is not 

 indicated. It is situated near the Northwestern jiortioii of tlie incl.ded region 

 as may be seen by reference to Plate II. 



II. This shows the pre-gLncial valleys of llie same region togellier with 

 their relation to the present drainage as outlined in Plate I. The he. ivy lines 

 represent pre-glacial valley walls and are drawn to represent the brow nf ihe 

 hills, not their bases. All these old \alleys in the western hall of the map are 

 filled with glacial debris as well as those in the eastern half which received 

 water from the glaciated region. Dotted portions represent places where this 

 filling rises above the general level of the surrounding flood plains. The wide 

 valley from Coshocton to Newark is that of the Old Newark River, the one in 

 the northwestern portion of the map, that of the Old Mt. Vernon River. 



III. In this map the pre-glacial drainage of the section is shown restored 

 It needs no special comment other than to call attention to some changes that 

 have been adopted in naming the old streams. What is designated on the map 

 as the Old Muskingum River should be the Old Newark River. Old Knox 

 River should be Old Mt. Vernon River and Old Wakatomaka Creek, Old Han- 

 over Creek. 



