Mercer limestone. The geologic section with the fossils collected 



here follow: 



Ft. In. 



Sandstone, shaly 10 



Ore, black band, sparingly fossiliferous 2 



Coal, Bear Run 2 



Clay 1 



Naiadites elongata Dawson 

 Fish plate 



Specimens of Naiadites elongata Dawson were obtained from 

 the black shales of the Bear Run coal horizon three-fourths of a mile 

 south of Stella, in the northern part of Section 14, Jackson Township. 



LOWELLVILLE (POVERTY RUN) LIMESTONE 



Stratigraphy and Extent 



The Lowellville limestone is the next faunal horizon above the 

 fossiliferous shales associated with the Bear Run coal, and is the 

 oldest of the series of marine limestones which occur in the Pennsyl- 

 vanian system. The limestone was named Poverty Run by Stout 

 in 1918 because excellent outcrops of the limestone occur along a 

 stream of that name in Hopewell Township, Muskingum County, 

 and this name has been used in the report of the Geological Survey 

 on Muskingum County. l It is present locally in the western part 

 of Muskingum County and extends northward into the southwestern 

 part of Coshocton, where it has been outcropping in Opossum Hol- 

 low, Washington Township. 2 No other outcrops are reported to 

 the north except in Mahoning County where G. F. Lamb describes 

 a "black, very hard, tough" limestone which "seems to lie just below 

 the horizon of the Quakertown coal," to which in 1910 he gave the 

 name Lowellville limestone from exposures in the town of Lowellville, 

 in the eastern part of the county. 3 This limestone apparently forms 

 the northeastern extension of the Poverty Run limestone of Mus- 

 kingum County, and the two deposits are alike not only lithologically, 

 but also faunally, as a comparison of their fossil content shows. In 

 Muskingum County along Poverty Run the member is found about 

 37 feet above the base of the Pottsville formation and 55 feet below 

 the base of the Pottsville formation and 55 feet below the Lower 

 Mercer limestone; the latter interval averages for the county 52 feet. 4 

 At Lowellville in Mahoning County, the horizon lies 64 feet above 

 the Sharon coal and 83 feet below the Lower Mercer limestone. 5 



Where typically developed in Muskingum County, the Poverty 

 Run limestone consists of several divisions, the lowest of which is an 

 extremely hard, gray, fossiliferous limestone with a maximum thick- 

 ness of 6 inches. It is characteristically affected by two systems of 



iStout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 21, p. 65 and elsewhere, 1918. 



2 Idem., p. 64. 



3 Lamb, G. F., Pennsylvanian Limestones of Northeastern Ohio below the Lower Kittanninjj 

 Coal, Ohio Naturalist, Vol. 10, March, 1910, pp. 128, 129. 



*3tout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 21, p. 65, 1918. 



5 Lamb, G F., P nnsylvanian Limestone in Northeastern Ohio below the Lower K'ttanning Coa', 

 Ohio Naturalist, Vol. 10, March 1910, pp. 128, 129. 



22 



