344 The American Geologist. December, 1904. 
4. Sunhury shale. Black, thin, even layered 23' — 5o'8" 
shale, ithe base resting on sandstone at top 
of cascade. About two inches above the base 
a thin layer containing Lingula melie Hall and 
Lingnlodiscina Neivbcrryi. (Hkill) Schuchert. 
3. Berea sandstone. A massive ledge of some- 6'+ 27'S" 
what coarse grained grayish sandstone below 
the Hartman barai, which is shown in Fig. 5. 
A little above, it makes a small cascade in the 
run where 6 feet 3 inches is shown, in which 
two layers show ripple marks. 
2. Drab, soft very argillaceous sbale just be- i6'8" 2i'8" 
low the sandsitone, which is probably the top 
of the Bedford shale. Most of this interval 
covered. 
1. Chocolate and mottled shale to the level of 5'^ 5' 
Big run. 
Smith Run Section 
About one-eighth of a mile to the southeast of the Hartman 
run is a similar and parallel one on the farm of Mr. Smith, 
which may be called the Smith run. On the bank of this 
stream is shown the entire thickness of the Berea sandstone 
and also above, that of the Sunbury shale in a shorter distance 
than in the Hartman run so that the conditions are more fa- 
vorable for measurement. The section is as follows : 
Total 
No. Thickness, thickness. 
6. Cuyahoga formation. Sandstones alternating 22' 81' 
with shales, some of the sandstone layers a 
foot or more in thickness. 
5. Two layers of sandstone in similar strati- Xa 59' 
graphic position to that of the "City ledge." 
4. Bluish-gray argillaceous shale which varies 5'6" 54'8" 
in thickness from 55/ to 6 feet. Two feet 
four inches below the top of the shale is a iV^ 
inch layer of sandstone. 
3. Sv.nhnry shale. Thin, even layered black shale 2o'8" 49'2" 
which is well shown in the narrow portion of 
the glen. About y/i inches above its base 
Lingula inclic Hall. Lingulodiscina Nczcbcrryi 
(Hall) Schuchert and fish scales occur. An- 
other measurement gave 20 feet 10 inches for 
the entire thickness. 
2. ' Berea sandstone. A prominent ledge of sand- 6'6" 28'6" 
stone on both sides of the run of variable 
thickness ranging from 3^2 to 7 feet on the 
