Bulletin of the Scientific Laboratories of Denison University. 



Vol, XIII. Article III. June, iqo6. 



THE GEOLOGY OF PERRY TOWNSHIP, LICKING 



CO.. OHIO. 



By F. Carney, 



OUTLINE. 



I. Stratigraphy 



1. Cuyahoga formation. 



2. Black Hand formation. 



3. Logan formation. 



4. Pottsville formation. 

 II. TOPOGRAPAY 



1. Weathering. 



2. Water table. 



3. Surface slopes and rock structure. 



4. Present streams. 

 III. Glaciation 



1. Little evidence of glaciation. 



2. The Hanover drift. 

 IV. Drainage 



1. The Wakatomaka and tributaries. 



2. Well borings south of Reform. 



3. Extension of the Hanover Dam. 



4. Reversal of Drainage. 



5. Relation of stratigraphical structure and drainage development. 



STRATIGRAPHY. 



In Perry township but one stream, Rocky Fork, is flowing 

 on rock ; and this is rock-floored for less than a mile, present- 

 ing at no point a vertical rock section of more than fifteen feet. 

 In the south central part of the township a small tributary of 

 the Wakatomaka creek cascades across the Black Hand con- 

 glomerate at a sharp grade exposing only a portion of the for- 

 mation. Scattered elsewhere we find ledges of the Black Hand, 

 the lower part of the formation being frequently covered by 

 talus slopes or by flood-plain deposits, while its contact with 

 the overlying Logan is generally hidden by products of weath- 

 ering. In a few places the highways crossing sharp elevations 



