274 Clara Gould Mark 



A quarter of a mile south of Bald Knob where the highway 

 crosses the hill at a slightly lower elevation, the Mercer limestone 

 may be seen in the road, apparently in place. No fossils were col- 

 lected here. 



By the side of the road north of Bald Knob is a large block of 

 Mercer limestone that has evidently slipped down from its original 

 position. This had a thickness of two feet. The following fos- 

 sils were collected from this block: 



0. Jiothetes crassus (Meek and Hayden) 

 Chonetes mesolohus Norwood and Pratten 

 Productus longispinus Sowerby 

 Spiriferina kentuckiensis (Shuniard) 

 Reticularia perplexa (McChesney) 

 Seminula argentea (Shepard) 



Parallelodon tenuistriatus Meek and Worthen 



ScMzodus cuneatus Meek 



Aviculopecten coxanus Meek and Worthen 



Aviculopecten cf. fasciculatus Keyes 



Acanthopecten carhoniferus (Stevens) 



Pecten {Entolium) aviciilatus (Swallow) 



Lima retifera Shumard 



Allorisma terminale Hall 



Pleurophorus subcostatus Meek and Worthen 



Astartella newherryi Meek 



FLINT EIDGE 



In the southeastern part of Licking county and extending east- 

 ward into the western part of Muskingum is a well defined ridge 

 with numerous spurs and outliers, which rises at its western ex- 

 tremity to an elevation of more than 1200 feet above sea level. 

 Eastward its elevation is somewhat less, though it is still more 

 than 1100 feet at the Licking-Muskingum county line; and for 

 a distance of eight miles or more this ridge forms the dominant 

 topographic feature of the region. The locality attracted the 

 attention of the early settlers, and received its name, by reason 

 of the extensive deposit of flint upon the highest parts of the hills. 



