274 CHARLES Se PROSS ie 
stone is shown. It is buff to bluish-gray in color, much of it 
quite iron stained, of fairly fine grain and somewhat friable. 
There is no question but that these outcrops just below the 
house of Mr. Swallow are in the very upper part of the Berea 
grit. 
Rocky Fork.— Dr. Orton noted ‘“‘an outcrop of black shale on 
the farm of Lorenzo Taylor, Esq., of Plain township,” in the 
northeastern part of Franklin county, which he stated ‘“‘may 
prove to belong to the Cleveland shale. 
been seen by the writer, but it is probably in the Sunbury shale, 
yy 
This outcrop has not 
since it is situated about in the line of strike of this formation. 
The best exposure of the Sunbury shale in central Ohio is 
on the banks of Rocky Fork, in Jefferson township, in the east- 
ern part of Franklin county, 2.3 miles northeast of Gahanna. 
It is well shown on the banks of the creek, both below and 
above the highway bridge, on the David S. Stagg farm. The first 
high bank on the eastern side of the creek below the bridge 
gives a fine exposure of the middle and upper part of the Berea 
grit, capped by the lower half of the Sunbury shale. The sec- 
tion of this bank is as follows, and it is shown in Fig. 1 
ROCKY FORK SECTION. 
Total 
Thickness thickness 
No. feet. feet. 
6. Soil and drift - - - - - - - ST aly) 20 
5. Sunbury black argillaceous shale, capping the Berea grit, the 
contact of which is finely shown on the vertical bank. About 8 
inches above the base of the shale is a zone of fossils in which 
Lingula melie Hall was obtained” - - RG 30 
4. Thick stratum of light gray sandstone forming the upper part of 
the Berea grit - 2 - = - 63% 23 
Parting of shaly sandstone to shales - - 
2. Zone of light gray to bluish-gray sandsone, somewhat irregu- 
larly bedded, and lenticular with some shale partings - - 12 16% 
I. Shaly sandstone alternating with layers of shale, Berea grit to 
creek level. - - 6 - - - - - - See AP AG 44 
The lower two or three feet of Sunbury shale capping the 
Berea grit is also shown on the western bank of the creek some- 
what above the cliff just described; while at various places on 
* Geol. Surv. Ohio, Vol. III, p. 643. 
