DAEASONB ORY SHAEE OF (OHTO 269: 
‘““Note on the Lower Waverly Strata of Ohio,’ in which the 
black shale of southern Ohio is for the first time correctly corre- 
lated with the black shale overlying the Berea grit in northern 
Ohio. Dr. Orton said: 
The identify of the Waverly black shale of southern Ohio and the 
Cleveland shale of northern Ohio, which was suggested as probable ten 
years since by Dr. Newberry, and which has since been adopted by most of 
those who have written on the geology of the Waverly group in Ohio, proves. 
toubeyamvernor.. 2) +) ci. The Waverly black shale finds its place directly above 
the Berea grit to the northward. The stratum has been distinctly described 
in the reports on the northern counties, but it has not been distinctly named. 
It has been treated of as the dark, fossiliferous shale at the base of the Cuya- 
hoga shale. No better name could be found for it than Berea shale— for 
it makes the roof of the Berea quarries, just as it does of the lower Waverly 
quarries of Pike county." 
Dr. Orton made no reference to the paper of Professor Hicks 
of the preceding year in which he gave the name of Sunbury 
black slate to this formation in central Ohio; nor to Winchell’s. 
earlier correct identification of the Berea grit in central Ohio. 
Dr. Orton gave a table correlating the Waverly formations 
of northern with those of southern Ohio. In this table the 75, 
feet of Bedford shale in the north is given as synchronous with 
the go feet of Waverly shale in the south; the 60 feet of Berea 
grit is equivalent to the 60 feet of the Waverly quarries and over- 
lying blue shale; and the 10 feet of Berea shale is correlated 
with the 15 feet of Waverly black shale; while the 150 to 250 
feet of Cuyahoga shale is represented by 300 to 400 feet of shale 
and sandstone in southern Ohio.’ 
In 1881, Dr. Orton read a paper before the American Asso- 
ciation. for the Advancement of Science, at Cincinnati, on ‘‘ The 
Berea Grit of Ohio,’ in which he emphasized the fact that there 
is no serious difficulty in tracing the formation across the state, 
and again reviewed the correlation of the Waverly formations 
between northern and southern Ohio. In reviewing the earlier 
correlation he said: 
It will be observed that a comparatively thin bed of black shale occurs. 
t 4m. Jour. Sci., 3A ser., 1879, Vol. XVIII, p. 138. 2 [bid., p. 139. 
