THE SUNBURY SHALE OF :O7IO 299 
Blackish shale near top of zone. Very fine argillaceous shale 
which is mainly bluish-gray to gray in color, but with some black- 
ish layers. It is finely shownonthe bank above the quarry. Sze7- 
bury shale - - - - 6 63% 
2. Top of Berea grit at top of quarry. Ache to dark gray or 
rusty-brown color, rather harder and finer-grained sandstone 
than the lower courses, 3% feet. Massive, light gray, coarse- 
grained grit, often weathers yellowish, 3% feet. Light gray, or 
frequently weathered to iron color, thin-bedded to shaly sand- 
stone, 34% feet. Massive, light gray, coarse-grained sandstone 
to grit. Ripple marks occur in lower part, 29% feet - - 39% 57% 
1. Contact of Berea gritand Bedford shale. Upper part of Bed- 
ford composed of bluish-gray argillaceous shales. Lower shales 
alternating with thin layers of sandstone, I inch or more in | 
thickness, to creek level - - - - - =) Affe) 18 
It appears that No. 4 of Dr. Nooeae Si Section wom stata 
at Bedford,” which he described as a gray shale from four to six 
feet thick and classed in the Berea grit,’ is the equivalent of 
what is called the Sunbury shale in the above sections. Dr. 
Newberry also included the superjacent zone of thin bedded 
sandstone (No. 3 of his section) in the Berea. It is the writer’s 
impression that he was in error in this particular, and that the 
top of No. 5 of his section should be considered as the line of 
separation between the Berea grit and the overlying formation, 
now called the Sunbury shale, but in the time of his reports con- 
sidered as the base of the Cuyahoga shale. The zone termed 
the Sunbury shale in the above sections is composed of a very 
argillaceous, thin-bedded shale, mainly gray to bluish-gray in 
color, with bands of black shale. It appears to the writer that 
this shale represents the Sunbury shale of central Ohio, but 
that it has largely lost its black and bituminous character. 
Remove Nos. 3 and 4 from the Berea grit of Newberry’s section 
and there remains but No. 5 of his section for the Berea, which 
he described as a ‘“‘thick-bedded yellow sandstone with ripple 
marks,’’ 45 feet in thickness ; while in the above section we have a 
thickness of 39% feet for the Berea. The Sunbury shale of the 
above section is well shown in Fig. 5, where the man 1s stand- 
ing ontop of the Berea grit and pointiny to the line of contact of 
the Sunbury and Cuyahoga shales. 
Gs 
Rept. Geol. Surv. Ohio, Vol. 1, Pt. 1, 1873, p. 197. 
