8 Bulletin of Laboratories of Dcnison University. [Voi. xii 



Creeks as against the small amount coming from above the Old 

 Millersburg col furnishes a very acceptable reason for the present 

 disparity in volume of water carried by the two valleys. Most 

 of the topographical features mentioned above have been in- 

 dicated on the map (Plate II.) showing the old drainage as 

 modified into the new. It is to be^noted that the heavy lines 

 representing the pre-glacial valley walls are drawn to indicate 

 the tops of those walls, not their bases. 



It has already been mentioned that a preliminary trip was 

 taken up the old Hanover valley. The results of that trip will 

 now be discussed somewhat more in detail. The floor of this 

 old valley, which is a continuation of the Hanover morainic 

 dam, is rolling and more or less cut up by small ravines. Very- 

 soon after entering its mouth the drainage is found to be flow- 

 ing up the valley away from the old main stream. About two 

 and a half miles from the valley's mouth there is another mo- 

 rainic dam rising some fifty feet above the bed of the run. But 

 this obstacle has not been of sufficient elevation to turn the 

 water back over the Hanover dam. The run has made its cut 

 at the junction between deposited material and the old valley 

 wall (west side), so that one side of the gorge is rock and the 

 other morainic material. East of this point the dam slopes 

 down somewhat rapidly to the level of the stream bed again, so 

 that for a distance of two miles further to its junction with the 

 Wakatomaka, near the county line, the run is little more than 

 a ditch winding through the fields and having a very sluggish 

 current. Wakatomaka comes down the drift-filled valley as a 

 much larger stream, but has the same characteristics of a wind- 

 ing bed and sluggish current. Instead of flowing on down the 

 old valley to the Licking, however, the Hanover dam has been 

 high enough to force the waters over a low col in the north- 

 western corner of Muskingum county, and thus allow them to 

 escape by another route into the Old Newark river. At Fra- 

 zeysburg they turn up this old river valley (the eastward pro- 

 longation of the Hanover dam again prevents them from flow- 

 ing down the old course) and continue sluggishly to the Mus- 

 kingum at Dresden. Reference has already been made to Pro- 



