588 CHARLES S. PROSSER 
Berea formations. Above the basal, concretionary sandstone of 
the Berea, zone No. 3, is the zone of thin sandstone to arenaceous 
shale, No. 4, above which is the continuous sandstone of zone No. 
5, with some concretionary structure in the lower part. 
The contact of the Bedford and Berea formations is excellently 
shown on both banks of the south branch of Spruce Run, one mile 
6 im 
Frc. 1.—Bank on north branch of Spruce Run showing the undulating contact of 
the Bedford and Berea formations as indicated by the strips of paper and the hammer. 
Photograph by T. M. Hills. 
south of the place just described on the north branch. These 
banks are not far below the highway on the farm owned by Mr. 
Frank Merrit of Delaware, now occupied by A. Looker, and about 
6 miles northeast of Westerville. The southern bank shows more 
of the upper part of the Bedford and the following section was 
measured near its eastern end: 
SECTION ON SOUTHERN BANK OF SOUTH BRANCH OF SPRUCE RUN 
Total 
No. Thickness Thickness 
Feet Feet 
10. Berea sandstone.—Old quarry near the top of the 
bank which contains layers of buff, fine-grained, 
quartz sandstone with numerous brown spots when 
weathered. Some of them are not very hard and 
weather to a decided brown color. Certain ones 
