STRATIGRAPHY OF FOSSILIFEROUS MEMBERS 25 



Strata measured in Grace mine and in hollow to the east, Section 10, 

 Coal Township, Jackson County 



Feet Inches 



Limestone 1 11 



Shale, dark > Lower Mercer J 1 10 



Limestone J |^ 1 



Covered 9 



Coal, cannel, Lower Mercer 



Top of Shaft 



Covered 97 



Coal, Quakertown 3 



Summit County. No other fossils were found on the Quakertown 

 coal horizon except in the extreme eastern part of Summit County 

 where Lingula carbonaria Shumard is present in great abundance in 

 the fossiliferous shales associated with a thin coal bed at Mogadore 

 Station, five miles east of Akron (Locality 12). 



Summary 

 The fossils collected from the Quakertown or No. 2 coal horizon are : 



Lingula carbonaria Shumard 

 Naiadites elongata Dawson 



BEAR RUN COAL HORIZON 

 Stratigraphy and Extent 



The shales and black band ore associated with the Bear Run coal 

 constitute the next fossiliferous horizon above the Quakertown coal. 

 Although absent in some localities, the stratum is fairly persistent in 

 southern Ohio, and extends from Scioto County through Jackson and 

 Vinton as far north as Muskingum County. 1 In Scioto County the 

 interval between the Bear Run coal horizon and the Sciotoville clay 

 with the associated Anthony coal varies from 62 to 86 feet with an 

 average of 71 feet; northward in Jackson County the interval is some- 

 what less, from 20 to 80 feet with an average of about 60 feet. 2 En 

 Muskingum County this distance measures about 45 feet. 



The Bear Run coal attains its greatest development in the Dever 

 Valley in Hamilton Township, Jackson County, where it is of / good 

 quality and has been mined for local use for many years. Its thick- 

 ness varies from 1 foot to 2 feet 6 inches, with an average of almost 2 

 feet. The character of the deposit varies greatly from place to place, 



'Stout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 20, p. 15, 1916; Bull. 21, p. 60, 1918. 

 2 Stout, W., Geol. Surv. Ohio, Fourth Ser., Bull. 20, pp. 115, 552, 1916. 



