BEDFORD AND BEREA FORMATIONS IN CENTRAL OHIO 599 
the disconformity in the contact of the Bedford and Berea forma- 
tions is finely shown.* 
A view of the lowest outcrop of the Berea sandstone, as described 
in the above section, is given in Fig. 3. The student is indicating 
the lowest point, stratigraphically, of the base of the Berea which is 
seen to gradually rise as followed up stream. Below the sandstone 
is the soft, gray Bedford shale. At the line of the prominent joint 
in the Berea, a little farther down stream than the student, the base 
Fic. 3.—Disconformable contact of the Bedford and Berea formations on Smith’s 
Run. Photograph by H. A. Gleason. 
of the Berea rises rather abruptly, so that it is 5 ft. 8 in. higher 
than its lowest point. The base of this part of the Berea is clearly 
shown at the left edge of the picture. The top surface of the Berea 
is uniform all along this bank, showing that there has not been any 
settling of the blocks along the joint line. 
Slate Run section.—About 33 miles southwest of Lithopolis or 
three-fourths of a mile northwest of Marcy on the farms of J. M. 
Hensel and Enos Zwayer in the northeastern corner of Pickaway 
County, an interesting section is shown along Slate Run. 
tTbid., Plate XIX, Fig. 6. 
