THE SUNBURY SHALE .OF OHIO 287 
4. The best stone in the quarry, which is sawed and shipped exten- 
sively; the upper course 16 inches and the lower one from 18 to 
20 inches in thickness. Base of quarry - - - - - 3-— 37— 
3. Course of 32 inches - - . - - - - - a 24 34 
2. Good sandstone, which is apparently the base of the Berea sand- 
stone - . - = - - - - - - - «1% 31% 
1. From base of the Berea sandstone covered slope to mouth of 
well directly below quarry at house of Mr. L. S. Risley. Accord- 
ing to Mr. Combs, the top of the Ohio black shale was struck at 
a depth of from 30 to 40 feet in this well, which gives a thick- 
ness from 60 to 70 feet for the Bedford (Waverly) shale. Dr. 
Orton gave the thickness of the Waverly shales in Pike and Ross 
counties as go feet * and it is not improbable that the top of the 
Ohio black shale occurs at a greater depth in the well than 
reported above - - - - - - - - =O 30 
The above section gives nearly 32 feet for the thickness of 
the Berea sandstone, and 60 to 70 feet for that of the subjacent 
Bedford shale. The general color of the building stone is gray, 
although sometimes rather buff or even greenish on weathered 
surface. There are layers showing ripple marks and also bluish 
to greenish shales, some of which are much iron stained. The 
general appearance of the stone is quite similar to that of the 
Berea sandstone in central Ohio. 
The slope of the hill above the sandstone is very gradual, 
and the Sunbury or Waverly black shale does not make con- 
spicuous outcrops; but its occurrence immediately above the 
sandstone is shown in the small pit above the quarry, where two 
feet of its lower part is exposed. 
On the ‘General section of the Waverly system in Pike and 
Ross counties”? Dr. Orton gave, as occurring between the 
‘Waverly quarries and the Waverly black slate, a zone of ‘shales 
with concretions of iron ore’’ 30 feet in thickness. This zone 
is apparently not described in the text, where it is stated that 
the Waverly black slate comes ‘‘immediately above the Waverly 
quarries,’’3 and no indication of this intermediate shale was seen 
in the sections which were examined by the writer. 
* Rept. Geol. Surv. Ohio, Vol. U1, Pt. 1, 1874, Fig. 1, ops p. 615, and Fig. 2, op. p. 
618. 
* Lbid., Fig. 1, op. p. 615, and Fig. 2, op. p. 618. 3 [btd., p. 624. 
