BEDFORD AND BEREA FORMATIONS IN CENTRAL OHIO 587 
southeast of Galena and 63 miles northeast of Westerville. The 
contact is finely shown for some rods on the northern bank of the 
stream where the following section was measured: 
SECTION ON NORTH BRANCH OF SPRUCE RUN 
Total 
No. Thickness Thickness 
Feet Feet 
5. Berea sandstone.—Top of bank. 
Buff sandstone containing numerous brown spots and 
composed of rather small grains of quartz sand as seen 
under lens. The base of the layer somewhat irregu- 
lar with a tendency to concretionary structure...... 33 Tr 
4. Zone composed mostly of thin sandstone to arenace- 
ous shale; but with the texture of the Berea. There 
is, however, a little soft, buff shale. The zone varies 
INULMICKMeSseLonN Ms tOnktt: 4lMms. ssi. fs csc othe 1 tea 
3. Buff, quartz sandstone containing many brown spots 
as weathered. The top of this zone is even; but the 
base is irregular, making a variation in thickness from 
1 ft: 5 in. to 2 ft. roin. The under side of this sand- 
stone is irregular and rough as though conforming in 
shape to the uneven upper surface of the Bedford. 
The lower part, at least, of this zone is contorted as 
by concretionary action, so that it has the appearance 
of a concretionary layer. ‘The disconformity is shown 
IMM IGASTAOREMISHMANKEr we tee sce ees we veto ee 2s: 6; 
. Bedford formation.—Bank composed mainly of soft, 
blue to buff, argillaceous shale with occasional thin 
layers of sandstone varying from } to 14 in. in thick- 
ness. The top of this shale is irregular as though 
worn by erosion; but in places the thin layers are 
depressed where the base of the concretionary-like 
superjacent layer is lowest as though pushed down- 
ward by the concretionary action. ‘The thickness of 
this zone from water level to the base of the con- 
cretionary layer varies from 5 ft.3 in. to7ft.2in.... 67+ 6;= 
1. Farther down the stream and stratigraphically lower 
than the above zone in the midst of blue, argillaceous 
shales are blue, hard, compact sandstones, some of 
them several inches in thickness, which weather to 
brown, rotten stone indicating the presence of CaCO. 
bo 
A view of this bank is shown in Fig. 1, in which the strips of paper 
and the hammer indicate the undulating contact of the Bedford and 
