302 CHARLES S. PROSSER 
section just described and a short distance above the Water 
Works is the following section, the rocks of which are apparently 
above those of the former section and in the lower part of the 
Cuyhoga formation. 
SECTION ABOVE WARREN WATER WORKS. 
Total 
Thickness thickness 
No. feet. feet. 
7. Soil and till - - - - - - - - - 
6. Apparently shale - - - - - - - - - 
5. Bluish-gray sandstone - - = - - - - WA aie 16 
4. Soft bluish-gray, very a need: shale - - - - -. 23 15% 
3. Compact layer of bluish-gray, fine-grained sandstone - oi) YA eis 13 
2. Blackish shales at top containing specimens of Zizgu/a. ‘The 
shales are mainly bluish-black; but contain thin bituminous 
layers, especially in the upper part, and alternating with the 
shales are thin layers of bluish sandstone, which are thicker 
near the base of the cliff, and some are slightly concretionary, 
weathering to a decided rusty color. Specimens of Lzxgula are 
numerous in the blackish shales near the top, and some were 
also collected in the blackish shales near the base of the 
section - - - - - - - - - - II 12% 
I. At the upper end of the exposure, where the rise brings up the 
lower rocks, we find that below the shales of No. 2 are coarse 
arenaceous shales to bluish-gray sandstone, about 1% feet 
shown. This stratum is apparently the sandstone zone occur- 
ring on top of the Sunbury shale. Level of Mahoning river 1% 1% 
The prominent sandstone layer at the southern end of the 
cliff is 9 feet 10 inches above water level, and 420 feet farther 
north, at the northern end, 12 feet 4 inches above the water, 
giving a dip of 2 feet 6 inches for that distance to the southeast 
or at the ratel of 31 teet per mile: Bhisssection isseonsideredvas 
in the lower part of the Cuyahoga formation, and shows that its 
lower shales are blacker than those near the base of the formation 
in northern and central Ohio, and somewhat similar to those of 
the subjacent Sunbury shale 
On the western bank of the Mahoning river, 1% miles from 
the court house park in Warren, on the farm of Warren Brobst, 
the anticlinal fold already noted on the eastern bank brings up 
the Berea sandstone. At the base about four feet of Berea sand- 
stone is shown above low water, which is mainly thin-bedded. 
