270 Clara Gould Mark 



of the Geological Survey of Ohio, vol. v, 1884, pp. 13 and 14, Dr. 

 Orton correlates this limestone with the Lower Mercer of Penn- 

 sylvania and describes it at some length. 



DESCRIPTION OF LOCAL SECTIONS 



The region studied in the preparation of this paper extends from 

 the vicinity of Newark, Ohio, east to Zanesville and south to 

 Somerset and Roseville, and embraces portions of Licking, Mus- 

 kingum and Perry counties. Particular attention was given to 

 the Mercer limestone as it occurs in this area, and where oppor- 

 tunity afforded the associated rocks both above and below it 

 were also studied to some extent. In the various exposures stud- 

 ied the strata were seen in ascending order from the Maxville 

 limestone at the top of the Mississippian system, through the en- 

 tire thickness of the Pottsville formation at the base of the Penn- 

 sylvanian system, and up to the Lower Kittanning coal in the 

 Allegheny formation. 



NEWARK 



Bald Knoh. Near Newark the Pottsville is the highest forma- 

 tion exposed, and the Mercer limestone is its highest member seen 

 in this vicinity, being found only upon the top of one of the highest 

 hills. This hill, spoken of in the various Ohio reports as Bald 

 Hill, McFarland's Hill, and "the hill above Dr. Wilson's old coal 

 entry," lies about two miles southeast of Newark, and on the topo- 

 graphic map of the United States Geological Survey is called Bald 

 Knob. The crest of the hill is 1220 feet above sea level, and about 

 400 feet above the level of the South Fork of the Licking River 

 at the Second Avenue Bridge. The following section was meas- 

 ured here: 



