V. 



A CONTRIBUTION TO THE KNOWLEDGE OF THE 

 PREGLACIAL DRAINAGE OF OHIO. 



PART I. 



W. G. Tight. 



CONTENTS. 



1. Introduction. 



2. The Topography and Present Drainage of Licking County, 



3. The Present Channel of the Licking River. 



4. Evidence of a Buried Channel North of the Present Licking Rirer. 



5. The Present Muskingum Valley. 



6. The Course of the Preglacial Muskingum. 



7. Probable Causes which Produced the Changes in the Drainage of the Mus- 



kingum and Licking Rivers. 



8. Relation of the Preglacial Muskingum Drainage to the Other Drainage Sys- 



tems of Ohio. 



9. The Hocking River and its Tributaries. 



10. The Scioto River ; Characters of its Upper and Lower Portions. 



11. The Miami Drainage Channels and the Character of the Topography of 



that Region. 



12. Evidence of a Buried Channel to the Northwest. 



13. The Southern Tributaries of the Ohio River. 



14. The Character of the Ohio River Gorge. 



15. Conclusions and Theoretical Considerations. 



I. Introduction. 



The facts presented in this article have been largely collected 

 during the last two years in connection with the geological work 

 and field excursions of the various classes in geology in Deni- 

 son University. Various members of the Senior class of 1894 

 have assisted in the work in the region around Hanover and 



