HURON AND CLEVELAND SHALES OF NORTHERN OHIO 331 
No. : THICKNESS aces 
f Ft. Ins. Ft. Ins. 
omy tensile eis. o. Glseclha 2 ih ways bes s va systns s 113. 618 II 
APPS ACKES ALCS hire ssc od Goin Shale hoe ai. osleig oes ve 10 17 LI3 
T'Sn., [EUIVENG 0 a Aenea te aro 2 2 Cy, 1055 
AG Shialewre hi shite ts wise, fae foane a ees ix | tf I1Z 
2. LEAL S61 eS eee en ee 6 14 10 
ee Ee AC KOS INEULE ee SPs rn aid. Se aw ES Ses nto te, cage divs Stags = i 14 4 
APES UTE MSIL rearrested Bryne o Sat Beas, Sev nye Neate Gia ie Aa 4 14 3 
11. Black, hard, bituminous, slaty, fissile shale.... 2 3 13 II 
to. Blue shale containing irregular more or less 
disk-shaped CONCTEtIONS 2. 2.4 6 ele es I a II 8 
ppm ie kaSialemenmnc)® ainitts ata sailed oe tates gd 7 fe) 8 
BPMN LULE SANs Pome aia. dog ols v0.10 kel tye Saapercbiare ahs bs Skee & 7 IO I 
PIPES CIEKASIVALCRE NAR. WM y Sits nc a sacs Stain ars 6 4 ) 6 
En TEMES TRIE. | es a een ee, 9 Scan 35 9 2 
5. Black, bituminous, hard, slaty, fissile shale 
containing some large spherical concretions. 
There are two small ones at almost the top of 
IELEWIS PAOLO A IS URO  e 7 LOx 8 103 
4. Blue, rather argillaceous shale.............. a 8 I A 
i, LENIN! é Clove Fei Se PON et en ne ae fs 2 ee 4 
2. Blue shale a little farther upstream than the 
REOHTCEC DUOTIS Wey ake Ae die Sais avon Gs he eo hs 2+ te. 2 
1. River level with rather irregular concretions in 
ISICEGiE AM eri etotr se ats cree tie Beton ls Siena Sa 3 
In the above section the black shale containing spherical con- 
cretions of zone No. 5 is believed to be the continuation of the 
lower black shale containing similar concretions as exposed on 
the western bank of the Huron River on the Andrews, Heckelman, 
and McGue farms, and then with the upper black shale of the Milan 
section. Above this black-shale zone are alternating strata of blue 
and black shale before reaching a blue-shale zone a foot or more in 
thickness containing irregular or disk-shaped concretions above 
which is a conspicuous black-shale zone. This black-shale stratum 
is 2 ft. 3 in. thick in the Enterprise section, 2 ft. 3 in. in the Andrews, 
2 ft. 13 in. in the Heckelman, and 2 ft. in the McGue section. The 
section by Dr. Kindle “near the bridge 3 miles southwest of Milan’ 
apparently is at or near the locality where the above section 
was measured. 
TO PNGi Ap 20. 
