Waverly Formations of Central Ohio. — Prosscr. 339 
below the fall 4 feet 2 inches is shown and 
probably the thickness of the zone is a few 
inches greater. Mr. Cumings gave this shale 
as 5i feet and Mr. G. F. Lamb makes it just 5 
feet. The base of the shale marks the base of 
the Cuyahoga formation. 
Sunbury shale. Black, fissile shale, in very 28±' 38' 
thin laminje, considerably iron-stained on old 
exposures. A little above its contact with the 
Bcrea the shale forms a bank 15+ feet high on 
the western side, where some of it is rather 
grayish in color and softer than it is generally 
found. Farther up the stream on the op- 
posite side is another 15 foot bank of black 
shale, above which is the mainly covered gray 
shale zone at the base of the Cuyahoga forma- 
tion, capped by the overlying sandstone. The 
contact of the Sunbury shale and the shale 
zone at the base of the Cuyahoga formation, 
however, may be seen in the bed of the stream 
a short distance below the fall formed by No. 
6 of this section. 
In the bed of the stream, 3J/S inches above 
the top of the Berea grit, is a thin, but 
very fossiliferous zone. This is the one al- 
most universally found very near the base of 
the Sunbury shale and at this locality con- 
tains numerous specimens of Linsiila melie 
Hall, some of a larger Liiigida, Lingulodis- 
cina Newberryi (Hall) Schuchcrt and frag- 
ments of fish. It is somewhat difficult to 
measure the thickness of the Sunbury shale 
with a hand level on account of the distance of 
the sights, but careful measurements by 
Messrs. J. E. Hj'de and G. F. Lamb make its 
total thickness 28^ feet. 
Berca grit. The top of this sandstone forms 3'± 10' 
the floor of the stream and a small rapid just 
below the base of the black shale. The upper 
part contains plenty of iron pyrites and ripple 
marks occur in the upper layers. The rock 
which is fairly coarse grained, gray in color, 
but greatly iron-stained on the weathered sur- 
face, forms a ledge on the eastern bank of the 
creek, just below a fence. On the bank 4 
feet is shown, to which perhaps a foot or more 
ought to be added in order to reach the top of 
the sandstone in the bed of the stream. From 
