THE SUNBURY SHALE OF OHIO 307 
the succeeding report, Dr. White spoke of the Orangeville shales 
as ‘these bottom deposits of the Cuyahoga formation of Ohio.” ? 
Dr. Orton stated that ‘‘White’s Orangeville shale is an equivalent 
of our Bereayshale: 2 
Maa Weis Cooper, 1a brick discussion of the Berea ‘shale; 
states that it ‘‘varies in Ohio from 15 to 50 feet in thickness 
throughout the line of outcrop, and is an exceedingly persistent 
and well-defined horizon. In northeastern Ohio, near the Penn- 
sylvania line, it lies immediately under the Carboniferous mill- 
stone grit; a fact of importance in the development of the Lower 
Carboniferous of that state, which has heretofore been misunder- 
stood.’’3 Mr. Cooper is in error in the above statement regard- 
ing the horizon of the Sunbury (Berea) shale, for on the hill 
and farm of Charles Troutman, about two miles north of Orange- 
ville, the base of the Sharon conglomerate (Millstone grit) is 
barometrically 270 feet above the level of the Pymatuning 
Creek in Orangeville, at the base of the cliff of Orangeville 
shales. 
Dr George: aGirty in recent years: has devoted a, great 
deal of time to the study of the Waverly series, and he differs 
from Dr. I. C. White and Professor Cushing, who correlated the 
Berea grit with the Corry sandstone of Pennsylvania, in regard- 
ing it as ‘the equivalent of the Cussewago sandstone of north- 
western Pennsylvania,’4 the top of which, according to the 
Pennsylvania Reports, is stratigraphically about 35 feet below the 
base of the Corry sandstone. Dr. Girty stated: ‘It is doubtful 
if the Corry sandstone is represented in Ohio.” Dr. Girty further 
stated that ‘‘the Orangeville shale of that region is the basal 
third of the Cuyahoga shale, in part equivalent to Orton’s Berea 
shale,’ 5in which statement the writer would fully concur, for 
Dr. I. C. White, in his reference to the outcrops near Warren, 
' Tbid., Q*, 1881, p. 89, and see p. gof. 
2 Rept. Geol. Surv. Ohio, Vol. VII, 1895, p. 33. 
3 Geol. Surv. Mich., Vol. VII, Pt. II, 1900, pp. 286, 287. 
4 Science, N. S., Vol. XIII, April 26, 1901, p. 664. 5 [bid. 
