IVazrrly Foniuitioiis of Central Ohio. — Prosscr. 351 
Total 
No. Tliickncss. thickness. 
II. Soil to top of bank 5 to 10 feet. 
10. Mainly thick to thin bedded sandstone, buff 30' 55' 
to gray and iron-stained on weathered surface, 
but blue to gray on fresh fracture. 
9. Mostly covered, occasional outcrops of sand- I9'6" 25'+ 
stone commencing about 12 feet above the base 
of this zone. 
8. Layer of hard, bluish-gray sandstone, coars- o'6" 5*7" 
er grains than in the thin layers below ; 6 
inches shown in the bank and covered above, 
so that the layer is probably thicker. 
7. Blue argillaceous shale. o'3" 5'i" 
6. Hard layer of fine grained sandstone of o'l^i" 4'io" 
rusty color as weathered. 
5. Soft argilhceous bluish shale, which has 2'^" a'SI/z" 
very little grit. 
4. Thin sandstone, similar to lower one, from o'2^" ^'^iVi" 
2^ to 3 inches in thickness which weathers 
rusty on its edge. 
3. Bluish argillaceous shale. o'i04:" 2'i'' 
2. Fine grained argillaceous sandsitone, bluish- o'3" i'3" 
gray in color and perhaps slightly calcareous. 
I. Very argillaceous shale, bluish as low as ex- 1'-+: i' 
posed in creek. 
The barometer gave an interval of five feet from the base 
of this section to the top of the Sunbury shale on the Black 
farm. The shales and thin sandstones from No. i to 7 inclu- 
sive with a thickness of five feet one inch are regarded as 
representing the upper half of the soft shale zone at the base 
of the Cuyahoga formation which, with the five foot interval 
to the Sunbury shale, has a thickness of ten feet one inch at 
this locality. It will be noted that this thickness is in close 
agreement witli that of the same zone described in the section 
three-fourths of a mile farther down the creek in the bank 
above the Broad street pike, where it is ten feet two inches. 
Again the fall in the creek from the shale bank below the 
Presbyterian church to the Sunbury shale bank above the 
Broad street pike is about fourteen feet so that the bed of the 
stream at the former locality would be about five and one-half 
feet above the top of the Sunbury shale. 
A few rods farther up the creek than the section just de- 
scribed is a conspicuous steep, rocky bank on its eastern side 
