BEDFORD AND BEREA FORMATIONS IN CENTRAL OHIO 5091 
Berea than in the top one of the Bedford from 2 to 6 in. lower. 
This marked change in the chemical composition of the sandstones 
above and below the line of disconformity, together with that 
structure, is considered as proving that the line of separation 
between the Bedford and Berea formations occurs at the horizon of 
this line of disconformity. 
The lower part of the above section is shown in Fig. 2. The 
hammer with the sheet of paper rests on top of the calcareous sand- 
Fic. 2—Southern bank on south branch of Spruce Run showing contact of 
Bedford and Berea formations. ‘The hammer and sheet of paper mark the 1#- to 2-ft. 
layer of calcareous sandstone in the Bedford and just above the sheet of paper in the 
man’s hand is the base of the Berea. Photograph by T. M. Hills. 
stone, zone No. 2, the upper calcareous sandstone near the top of 
the Bedford, zone No. 4, is just under the sheet of paper in the man’s 
hand and above it is the basal, concretionary sandstone of the Berea, 
zone No. 6. Above the basal sandstone in ascending order may be 
seen the shale of zone No. 7, the thin-bedded to shaly sandstones of 
No. 8, and the lower layers of the continuous sandstones of No. 9. 
On the northern bank, a few rods farther up the stream, is another 
interesting outcrop, showing the contact of the two formations, only 
