604 CHARLES S. PROSSER 
Total 
No. Thickness Thickness 
Feet, Inches Feet, Inches 
2. Arenaceous layer to thin sandstone, from 4 to # in. 
thick, which in a horizontal distance of 4 ft. farther 
up stream is cut off by the base of the Berea. This 
shows a decrease in thickness of the upper part of 
the Bedford formation of about a foot in a horizontal 
distance of 4 ft. This bank is shown in Fig. 6 in 
which this layerisindicated by the hammer....... o I ee) 
1. Mainly bluish, soft, argillaceous shale with an 
occasional thicker and arenaceous layer. Level of 
- 
mars ee cee * 
PORDAS yo Ne OE 
Fic. 6.—Disconformable contact of the Bedford and Berea formations on Slate 
Run. The hammer marks the thin Bedford sandstone, No. 2 of the section. Photo- 
graph by W. C. Morse. 
