HURON AND CLEVELAND SHALES OF NORTHERN OHIO 347 
SECTION ON RATTLESNAKE CREEK ON LANDOLL FARM 
No THICKNESS Tora 
THICKNESS 
Ft: In. Ft. In. 
10. Berea sandstone: Shaly to fairly massive sand- 
stone, but more or less shattered and highly 
inclined to the west. The sandstone has more 
or less contorted or concretionary structure 
and there is also some shale, from 8 to to ft. 
shown. The lower layer is full of marcasite.. o+ .. 46 6 
9. Blue, argillaceous shale lithologically ‘like the 
Be dtOndh eer Bios tes dee yo ge eke SicNedsrah AS hears 2 6 37 6 
Bem COVETEM: MTLeRVall ya ogee Bafa Sth ane occ Se I QO 35 
7. Bluish-gray, argillaceous shale lithologically 
WnicesihesBedtord: 22054. tries ete 0 sells so 6. ys". 16 6 33 B 
Grebiacke hard shale, 2 eee oe a. cos te eile ac I a ° 16 9 
5. Bluish-gray, argillaceous shale from 13 to 24 
Din (BLer(e) 60.0 9 ce On Rene 2 ee Re ee 2+ 15 7 
Pemblack nara Slaale 2 02 Soils kislae si ove o's Ys I 9 15 5 
3. Bluish-gray, argillaceous, blocky shale litho- 
logically liketBediord 3. sev: sh dys. aes os 4 o+ 13 8 
2. Black, slaty shale lithologically like Cleveland 2 4 9 8 
1. Covered to creek level; but on the opposite 
bank just below the old stone bridge is black, 
slaty shale regarded as Cleveland, which con- 
tains numerous specimens of Sporangites..... 7 4 7 4 
In the above section the blue to bluish-gray argillaceous shale 
of zones 7 and 9g certainly has the lithologic appearance and strati- 
graphic position of the Bedford. The black shale of zone No. 6 
is lithologically like the Cleveland; but below is the 2+-in. layer 
of bluish-gray shale (zone No. 5), then 1 ft. 9 in. of back shale, 
(zone No. 4), below which is a 4-ft. zone of bluish-gray shale 
(No. 3), so that it is somewhat uncertain where the line between 
the Bedford and Cleveland ought to be drawn. A few rods below 
the locality of the above section are two abandoned quarries with 
walls from 30 to 4o ft. high. The barometer indicated that the 
water level in the first quarry is fully as low as the bed of the creek 
opposite the section where the base of the Berea sandstone is 373 ft. 
above creek level. Mr. Landoll reported that a boring on the bank 
not far from the above section was all in “slate,” no sandstone in 
it. This is evidently another example of channel filling and others 
may be seen on the banks of the creek farther up stream. 
