HURON AND CLEVELAND SHALES OF NORTHERN OHIO 335 
The shales in the lower part of this bank are dipping upstream 
(S. 20° W.) at the rate of between 2° and 4°, so that the nearly 10 
ft. of black shale shown on the lower bank above the Lake Shore & 
Michigan Southern Ry. bridge have been carried beneath water 
level at this locality. 
At the three corners, about 1 mile south of Monroeville, is a 
road quarry where the following section was measured: 
SECTION AT THREE CORNERS SOUTH OF SCHUG’S 
2 COTA 
Xo. eee jae 
Ft. Ft. 
2. Continuous hard, slaty, black shale containing Protosalvinia 
MOS OREIELTLCS aR a OMRON Peyclltis «ose rere tn Sune e pag hee ass 10% 16 
1. Alternating black and blue shales as shown below the quarry 5 os 
The barometer gave the base of the continuous black shale in 
the above section as 5 ft. lower than the top of the bank at Schug’s. 
The dip varies from 13° to 2°, N. 60° E. The continuous black 
shale, zone No. 2, of this section apparently is the continuation of 
the broken black shale at the top of the bank in the section below 
Schug’s house. 
Standardsburg sections.—The hamlet of Standardsburg is located 
on the Huron River 13 miles south of Monroeville. The black shale 
on the western bank of the river a few rods above the highway 
bridge contains two very large concretions and the following 
section was measured just below the upper one on the land of Mr. 
William Cook: 
SECTION ON HuRON RIVER AT STANDARDSBURG 
TOTAL 
THICKNESS 
Ft. In. Ft. In. 
No. THICKNESS 
12. Black, hard slaty shale in which are the two 
very large spherical concretions. “The base of 
the upper one is only 8 in. above the base of 
this zone. The vertical diameter of the upper 
one is about 6 ft. and one-half the distance 
around it is 17 ft. so that its circumference is 
about 34 ft. This concretion isshownin Fig.4 5 I 8 83 
11. Blue shale which is rather hard............. : 63 3 ies 
ope laclasinalear, Garereks : kako e ak ca tesercae smile trert SH 3 I 
eplitiershalewspn A sectccts ee nines ate aes 13 2 ae 
8. Black shale in places split by 3-inch layer of 
lticesialetire oo Asn teenie tbe ee oe a sosiet 
to 
rio 
bo 
an 
