28 POTTSVILLE FAUNA OF OHIO 



Feet Inches 



Sandstone, shaly 10 



Ore, black band, sparingly f ossiliferous 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 (Lo- 

 cality 18). 



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 Pennsylvanian 

 system. The limestone was named Poverty Run by Stout in 1918 be- 

 cause excellent outcrops of it 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. 1 

 It is present locally in the western part of Muskingum County and ex- 

 tends northward into the southwestern part of Coshocton, where it 

 has been found outcropping in Opossum Hollow, Washington Town- 

 ship. 2 No other outcrops are reported to the north except in Mahon- 

 ing County where Lamb describes a "black, very hard, tough" lime- 

 stone 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 Muskingum 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 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 



'Stout, 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 

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



4 Stout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 21, p. 65, 1918. 



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

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



