LAE SON BOR STEAEE SOR OHSO 289 
On the eastern side of the creek at this locality is an old 
incline, at the top of which is an unworked quarry. The lower 
part of this quarry shows the thin, black, laminated Sunbury 
shale, the loose pieces of which are conspicuous on the dump 
near the top of the bluff, as seen from the creek valley below. 
Above the Sunbury is olive-colored shale, capped by the 
Buena Vista quarry stone, in two layers, or ‘‘ City ledge” as the 
outcrops of this stratum near Rockville, between one and two 
miles below Buena Vista, were termed in 1838 by Professor John 
Locke, in his geological account of Adams county." 
Some distance up the tramway from No. 5 is the incline in 
present use, the foot of which is barometrically 130 feet below 
theibascror the City ledge ~ at its! tops, Eerhaps 15 toro) feet 
above its base are fairly heavy sandstone layers in the Bedford 
formation, which, in the Ohio river bluffs, contains much more 
sandstone than in the central part of the state. The Berea sand- 
stone is shown at the side of the incline near its top, where the 
top of the formation is marked by a massive stratum, I foot 9 
inches in thickness, below which are thinner bedded and shaly 
layers. The Berea is light gray in color and fairly massive, 
above which in the soil by the side of the incline, are numerous 
pieces of the Sunbury black shale. From the top of the Berea 
sandstone on the incline to the base of the ‘‘ City ledge,’’ or 
Buena Vista sandstone, opposite the top of the plane is 21 feet. 
The excavation for the cistern at the head of the inclined plane 
was made in the Sunbury shale, large quantities of which are 
shown on its dump. 
The Buena Vista stone forms a prominent ledge just back of 
the top of the plane, and it has been worked more or less exten- 
sively for some distance along this bank of the stream toward 
its head. Not far from the present upper limit of the quarry, 
the ‘‘ City ledge”’ and overlying shales furnished the following 
section : 
t Second Ann. Rept. Geol. Surv. Ohio, 1839 (2), p. 263. The name was given 
because the stone was extensively quarried and used in the city of Cincinnati (see 
page 264). 
