THE SUNBURY SHALE OF OHIO 285 
Creek, about one-half mile above the former, on the Wolf farm, 
which is as follows: 
Total 
Thickness thickness. 
No. feet, feet. 
7. At least 18 feet of thin even black shale is shown; the upper 
part of which is much weathered and broken and finally con- 
cealed by soil. The thin, even layers of the lower part are 
finely exposed, and there is a sharp and clearly shown line of 
contact between the shale and the underlying sandstone.  Svez- 
bury shale - - - - - - - - - 18 20% 
6. Massive rather fine-grained bluish-gray sandstone, at top of Berea 
grit, which has a tendency to split into irregular layers, and in 
places there are shaly partings. Base of heavy stratum - - is 11% 
5. Blue to bluish-gray arenaceous shales and thin sandstones - 3% 744 
4. Blue sandstone stratum of variable thickness - - - - Yok 434 
3. Bluish arenaceous shales and thin sandstones - - - - «1% 4y 
2. Bluish-gray compact sandstone, which is sometimes concretion- 
ary and of somewhat variable thickness - - - - A Sos 
1. Bluish shales and thin sandstone to bed of creek; the sandstone 
very much ripple marked - - - - - - = =e I 
It appears to the writer that the first six numbers of the 
above section may be referred to the Berea grit instead of simply 
the massive 3% feet of sandstone — No. 6—immediately below 
the Sunbury shale. It is true that a considerable part of the 
rocks below No. 6 are shales; but the sandstones are thicker 
than in the first section, and this extreme development of shales 
on Stony Creek is thought to be simply a local phase of the 
formation. The above section is shown in Fig. —, where the 
massive 3% feet of sandstone at the top of the Berea forms a 
conspicuous layer across the middle part of the halftone, just 
above which is seen the projecting layer of thin, even-bedded 
black shale at the base of the Sunbury. 
On the east fork of Stony Creek, about one mile above Wolf 
bank, are ledges of rather bluish-gray sandstone alternating with 
layers of thin sandstones, which are ripple marked. This is an 
outcrop of the Berea grit, and in the field to the west, and some- 
what higher, are the thin black Sunbury shales. 
Waverly.—The rocks of the Waverly series were named from 
outcrops in the vicinity of Waverly, to which Professor C. Briggs, 
Jr., in 1838, gave the name Waverly sandstone series,’ to the rocks 
* First Ann. Rept. Geol. Surv. Ohio, p. 80. 
