348 CHARLES S. PROSSER 
sections. 
Vermilion River sections.—The next river east of the Huron 
is the Vermilion, which also has steep banks affording excellent 
One of the most interesting is on its eastern bank at 
Rugby (formerly called Manchester and Mill Hollow), in Brown- 
helm Township, 18 miles northeast of Milan on the Huron River. 
On 
to 
SECTION ON VERMILION RIVER AT RUGBY 
. Bedford formation: Near the bend of the river the upper part 
of the bank is composed of red shale with an estimated 
thiCKMESS\Ol 20 Tia ss oh ai ah 8 Nona) mene et ances we nae 8 
. Buff to gray argillaceous shale with an occasional thin, 
harder layer. Measured on roadside up the hill west of the 
. Very hard, gray, fine-grained sandstone which weathers to 
a brownish color and becomes slightly rotten. Shown in 
gully on eastern bank just below Bacon Brothers’ barn and 
by highway on western side with a thickness of from 5 to 6 
in. Blocks of this sandstone are conspicuous on the steep 
bank aboveithe Rugby, Riveribridgess asi. ase eee 
. Light to dark-gray, blue and buff, soft to rather hard argil- 
laceous shale with a 1-ft. layer of thin-bedded, very compact 
argillaceous limestone which weathers to brown. Fossils 
occur in these shales the most abundantly at 3 ft. 8 in. above 
the base of the zone. The description and measurement 
for this zone are from the outcrops by the highway west 
Of the mivier) where dts Omit. is im) cnicke ys se 
. Cleveland shale: Black, slaty shale finely shown in river 
bank above the Rugby bridge. Perhaps there are some 
lighter-colored layers below the middle of this shale. The 
bank has that appearance as seen from the opposite side 
of the river, although it is difficult to be certain. In the 
gully below the Bacon Brothers’ barn there is a covered 
interval of 134 ft. from the base of the thin sandstone to the 
top of the first exposed black shale. From this horizon 
down to river level at the Rugby bridge is 763 ft. as leveled 
by Mr. T.G. Roderick, the writer’s assistant. If to this be ad- 
ded the additional 7 ft. of black shale to bring it up to the 
base of the Bedford as shown on the western side it will make 
it 834 ft. Going up the river there is an anticlinal fold which 
near the bend brings up blue shale, and there are appar- 
ently about 8 ft. more of black shale to be added to the 
bank at the bridge, making altogether 913 ft. of black shale 
. “Erie shale” of Newberry: Blue shale and thin layers of 
blue micaceous sandstone, from 2 to 5 in. thick. At bend 
in river and to river level when water is low............. 
THICK- 
NESS 
Ft. 
20+ 
Io 
bole 
Ir 
TOTAL 
THICK- 
NESS 
Bt: 
140 
I20 
IIo 
100% 
103+ 
112 
