THE SUNBURY SHALE OF OFIO 297 
of Cuyahoga county, on the banks of Tinker’s Creek, are sev- 
eral good vertical sections from the Bedford shale or Berea grit 
into the Cuyahoga shale. Three of these will be given, and 
their comparison will show some lithologic variation in a com- 
paratively short distance. The following is a section of the 
south bank of Tinker’s Creek under the bridge of the Akron, 
Bedford & Cleveland electric road. 
SECTION AT THE A. B. & C. ELECTRIC BRIDGE. 
Total 
Thickness thickness 
No. feet. feet. 
5. Gray to bluish-gray shale, with an occasional blackish streak, 
which breaks into very small pieces as weathered and shown on 
the upper part of the bank. No fossils were found - - - 103 51 
4. Alternating shales and sandstones of bluish-gray color, the sand- 
stone predominating. Cuyahoga shale - - - 2 = AOA 
3. Thin argillaceous bluish-gray shales splitting into small pieces. 
At the base a blackish bituminous shale 1 inch in thickness, 
which splits into thin, smooth layers, and contains Lingua 
melie Hall. In lithologic appearance only the 1 inch of black- 
ish shale at the base of this shale zone resembles the Szzdury 
shale of southern and central Ohio and the eastern part of Cuya- 
hoga county, and this is not as black as typical Sunbury shale. 
It is probable, however, that the blue color and other characters 
of this shale are a local variation, and that all of this zone may 
be referred to the Sunbury shale. If not, then at this locality 
it has thinned to the 1 inch of black, fossiliferous shale noted at 
the base of the zone - - - - - - - a) Bete Ba 
2. Top of Berea grit; massive grayish, rather coarse-grained 
sandstone - = - - - = 2 : = = S215), 20s 
1. Shaly to thin-bedded blue sandstone to creek level, all of 
which is in the Berea grit. “There are plenty of ripple marks 
on the sandstone in the bed of the creek - - - - RY oat 5 
Farther down the stream the following section is shown on 
the eastern bank of the creek a little above the Bedford rolling 
mills. 
SECTION ABOVE BEDFORD ROLLING MILLS. 
Total 
Thickness thickness 
feet. feet. 
No. 
3. Gray, fine-grained, thin-bedded sandstone, alternating with lay- 
ers of shale, the sandstone predominating. Base of Cuyahoga 
shale - S = > - - : - - - 4% 35 
2. Thin-bedded argillaceous shales which are mainly of gray color, 
but passing from blackish-gray to black bituminous shales. At 
the base Limgula melie H. and Oréiculoidea occur sparingly. 
Sanbury shale - - = - - - - - - 0 27% 
