HURON AND CLEVELAND SHALES OF NORTHERN OHIO 339 
next bridge to the south crossing the river in the southwestern part 
of Peru Township and about 13 miles northeast of Havana, is a 
bank of slaty, black shale. This bank extends for a short distance 
on the northern side of the river both above and below the highway 
bridge and is 10 ft. or soin height. A few rods farther down stream 
where the river turns to the north is another bank of black, slaty 
shale on its western side, perhaps a little more than ro ft. in height. 
Neither concretions nor layers of cone-in-cone were seen in these 
banks of black shale. All of the banks farther south on Huron 
River in Greenfield Township that were visited are composed of 
alluvial and drift deposits until a point southeast of Steuben is 
reached where outcrops of Berea sandstone and perhaps Bedford 
shale occur. Apparently the bank of black shale in the south- 
western corner of Peru Township is the last black shale exposed on 
Huron River and it probably belongs in the Huron. 
GENERAL SECTION ON SLATE RUN AND HURON RIVER 
A general section of the shales from the upper bank on Slate 
Run on the Peter Hay farm down this run and Huron River to the 
lowest outcrop on the river near Milan has been prepared. The 
section is as follows and the column on the right indicates the 
location of each zone: 
GENERAL SECTION ON SLATE RUN AND HURON RIVER 
TorTaL THICK- ; 
THICK- NESS OF Location and Description of Zone 
NESS ZONE 
/ Uy 
° fe) Black and blue shale of Slate Run on Peter Hay farm. 
10’ Black, hard slaty shale on Slate Run. Large spherical 
50’ concretions in lower part. 
60’ 25’+ Blue and black shales on Huron River at William Schug’s. 
85’ Black shale from Monroeville to Seymour Creek. Spherical 
25/ concretions in lower part. 
110’ Blue and black shale in Enterprise section. Irregular 
47’ lenticular to disk-shaped concretions in upper and lower part. 
157. Black shale near base of Enterprise section. Spherical 
8’ concretions. 
165, Blue and black shale near Milan. Irregular disk-shaped 
3'— concretions. | 
168’ Black shale containing stems of Pseudobornia. Spherical 
8’+ concretions. Lower black shale of section near Milan. 
176’ Blue and black shale to river level near Milan. Lowest 
2! shale outcrop on Huron River. 
