2l8 CHARLES S. PROSSER 



feet of gray, thin bedded Berea sandstone, some of the layers a 

 foot or more in thickness, with some partings of clay shale below 

 which are 8 feet of bluish Bedford shales partly argillaceous and 

 partly arenaceous, while in the upper part are thin layers of 

 sandstone. The thickness of the Berea sandstone on this creek 

 is about 40 feet and in the upper part at the highway is a small 

 quarry. On the western bank of the Big Walnut between the 

 railroad and highway bridges, one mile northeast of Sunbury, 

 there is from 26 to 30 feet of it shown in the vertical 

 cliff. This formation is called the " Waverly quarry system" in 

 the report on Franklin county, 1 and the "Sunbury Calciferous 

 sandrock " by Professor Hicks. 2 



3. Sunbury ■ shale was named by Professor Hicks in 1878, 

 from outcrops on Rattlesnake Creek on the present farm of Amos 

 Whitney, about two miles east of Sunbury. North of the Whit- 

 ney house there is an outcrop of 3^ feet of this black 

 shale on the northern bank of the creek, and it may be seen at 

 irregular intervals for some distance down the stream. A single 

 specimen of a Lingula was the only fossil found, but the lower 

 part of the shale is concealed and the top of the Berea grit 

 crosses the creek a little below the house of Mr. W. P. Swallow. 

 There is a much better exposure on Rocky Fork, in Franklin 

 county, where the contact of the shale and Berea is shown just 

 above the highway bridge on the David Meyers farm. The lower 

 2 feet of the very fossiliferous shale is exposed, containing abun- 

 dant specimens of Lingula melie Hall, and Orbiculoidea Newberryi 

 Hall, together with fragments of fish bones and teeth. Farther 

 up the creek 8 + feet of the shale is shown on the western bank 

 resting on the Berea grit. 



This shale was first inappropriately named the "Waverly 

 black slate" by Andrews in 1870 3 because the term Waverly 

 had already been used for the larger division which includes 

 this shale. Geological nomenclature is being revised for the pur- 

 pose of eliminating and preventing the duplication of geographic 



1 Ibid., Vol. Ill, p. 639. 2 Am. Jour. Sci., 3d ser., Vol. XVI, p. 216. 



3Geol. Surv. Ohio, Pt. II, 1870, p. 66. 



