KNOX COUNTY. 



331 



1. Alluvium of valley, bordered by river Drift. 



S. Outcrops of Waverly covered by Waverly debris, and occasional large 

 granite bowlders. 



3. Heavy clay Drift. 



4. At two hundred and twenty-five feet above Mt. Vernon, outcrop of Waverly 



■without Drift, continuing up a gentle slope to two hundred and sixty 

 feet, where there is a broad undulating plateau of water-washed sandy 

 soil, with occasional Drift boulders. 



5. At an elevation of two hundred and seventy-five feet, hills covered with 



Drift, which extends in the proteated dep:{-easious to two hundred and 

 thirty-five feet. 



6. At three hundred feet, on the last elevation before descending into the 



. valley at Martinsburg, Waverly debris without any appearance of Drift. 



In Jackson township the Wahatomaka Creek — which has the sources 

 of most of its tributaries in the recently eroded ravines of the Coal 

 Measure rocks on the east — falls a little north of Bladensburg into the 

 old channel now occupied by Big Run, and is bordered by irregular 

 sandy hills of water-washed material, which are continued northward to 

 the junction of Big Run with Owl Creek. 



At Gambler the bend in Owl Creek or Kokosing River, called the 

 horse-shoe, gives an interesting exposure of the Drift, and furnishes im- 

 portant facts touching the elevation of the surface deposits and drain- 

 age. The following is an outline : 



The Horse-Shoe. 



