354 CHARLES S. PROSSER 
Later, Dr. Newberry changed his opinion concerning the age 
of these fish-bearing shales and wrote as follows: 
This dip misled us, and the thinning of the Erie shale, bringing the Cleve- 
land down near to the Huron, caused these two to be confounded, and led 
to the supposition that the fish-bearing black shales which form the lake shore 
in Lorain County were the upper part of the Huron; hence all the great Placo- 
derms discovered by Mr. Terrell were at first referred to that formation. 
This matter was, however, cleared up by an excursion made by the writer 
westward from Cleveland in 1886, and it is now definitely established that all 
the outcrops of black shale in Cuyahoga and Lorain Counties belong to the 
Cleveland shale, and that none of the fossil fishes described from northern 
Ohio should be credited to the Huron.? 
Section on Aaron Hill farm.—The following section was 
measured at a little gully on the Aaron Hill farm a few rods east 
of the end of the Harris road and one mile northeast of the Lake 
Breeze House: 
LAKE SHORE SECTION ON THE AARON HILL FARM 
No. THICKNESS Teese 
Ft. Tn. Ft. In. 
11. Bowlder clay with soil at top............... 5 oe 18 85 
to. All black, slaty, bituminous shale. In the 
shale a lens of coal 13 in. thick, 3 ft. long, and 
34 fit. above the sandstone layer of zone No. 6 11 5 13 83 
9. Blue, argillaceous shale from 1 to 1? in. thick .. IZ 2 33 
8. Sandstone layer from o to 17 in. thick....... .. I+ 2 2 
7. Blue to gray, argillaceous shale...-...-..... os way 2 I 
6. Blue, compact, micaceous, laminated sand- 
stone layer, from 3 to 6 in. thick, which is the 
conspicuous one on this part of the lake shore .. 452 1 I1y 
sBlackishaletromes toNs ins ticks ese ue A> eek 7 
4. Soft, gray shale from 2 to 3 in. thick with a 
streak of black shale at the middle of the zone 
frome tos Me GIy | yey stn, tlay eae Neepesnmnags Sa 25k 24 
34) Black shales arcyeiscte niet an sensaad ates seh iee ora oe 5 I ° 
2. Bluish-gray argillaceous and arenaceous shale .. I 7 
Tt Blackishale-tomakelleviel ew sarin cs 6 6 
The above section is about north of the Aaron Hill farmhouse, 
and a little farther east than opposite his barn the sandstone 
layer of zone No. 6 is at lake level. This is a dip of 13 ft. ina 
horizontal distance of 375 ft. The sandstone reappears in the cliff 
= Monograph U.S. Geological Survey, XVI (1889), 127. 
