338 CHARLES S. PROSSER 
at the former bridge. This appears to indicate that this zone of 
hard, slaty, black shale on Slate Run has an approximate thickness 
of some 50 ft. 
Section on Peter Hay farm.—Farther south on the farm of Peter 
Hay on the western side of Slate Run in Sherman Township is a 
bank composed of alternating black and blue shales which evidently 
overlies the one of hard, black shale already described along the 
lower course of this run. The section begins at the northern end 
of the bank and continues on up stream as follows: 
SECTION OF SLATE RuN BANK ON FARM OF PETER Hay 
No. THICKNESS -TyrreKNESS 
Ft. In. Et) in: 
12. Drift and alluvial material containing a con- 
siderable amount of worked-over black shale.. 8 ae T7 6— 
irplackashatteredsshal epey eeieea eee tes- cee I 6 5 
ro. Zone more or less disturbed but composed of 
bluciand blackishaleyi: 47) acme ue 2 oe 7 cis 
6: Blackyshale ve) yi. onitiokes, SNe na ia sulla) 83 = 6+ 
SunBlue shall enjuce te sci sic tea teem ee ara tao gn 83 4 92 
giBlackishale. ks copia us ean away sich ony) (ele alt Ta 4 1} 
6: Blueushialleys oy esl Ma eR leone ek Canna tints se 33 3 113 
5. Blackyslaty: shalewiiayiane waiters cence I 4 3 8 
4. Blue shale containing very irregular concre- 
tions of large size. One of them, very irregu- 
larly shaped, is 9 ft. long and lies imbedded in 
the blue shale; another one is about 7 ft. long 1 B 2 4 
gblacksshale yz. stoscminent NIC ken yee aerate Ms 3 I I 
2, «blue Shales alae aide Ras Seen nae teat taverdan fs, an 4 7 ite) 
1. Black, hard shale at northern end in bed of 
1 a ees Ae ba See SS LAC aaa aac We 6s: 6 
In the above section all the blue shale weathers into small 
pieces. The layers are more or less disturbed and it is difficult to 
estimate the dip accurately; but near the southern end it is about 
2° to the northeast. Farther up the stream the banks in general 
are low and alluvial and apparently no shales are exposed that are 
much higher stratigraphically than those on the Peter Hay farm. 
UPPER PART OF HURON RIVER 
As already stated, the banks of the Huron River above 
Standardsburg are generally alluvial and drift. The bed of the 
river, however, where the east-and-west road west of Macksburg 
crosses it, is apparently composed of black shale. Again, at the 
