346 "CHARLES S. PROSSER 
SECTION ON RATTLESNAKE CREEK NEAR East NORwWALK—Continued 
Ft. Th. Ft. In. 
6. Blue, soft; argillaceous shale containing small 
rusty concretions, and an irregular, lenti- 
eularione: ter tka Eee eae 8 Dceetie aeteenene eran 2 3 TH ° 
5. Three thin, blue, concretionary, sandy layers 
separated by blue shale and weathering to a 
TuStyeCOlOD Ac) ues phat rsa unre Aneta tae ene Eh 
As@livershale x20 ls tite: ae gteoat. sere aa eee ee I 
3. Black or blackish shale containing a con- 
cretionary layer with fairly good cone-in-cone 
structure. It thins out here and there on the 
bank but after an interval reappears at the 
same stratigraphic horizon and varies in thick- 
ness fromoto1sin. A thin band of blue shale, 
2+ in. thick was also noted in this zone of 
blacks lal Ge ic cere seh cen Sane estes Smee racer no 12 6 12 ite) 
2. Blue shale containing apparently a very thin 
layer, ¢ in. or so thick, of blue hard rock with 
a slight tendency to cone-in-cone structure... .. Aelita 4 
1. Black shale to bottom of creek. These lower 
two zones and a considerable part of the over- 
lying 123-ft. zone of black shale are only shown 
on the lower part of the bank at the axis of 
+ 14 9 
14 4 
Nur 
In the above section there is a layer of cone-in-cone in the black 
shale of zone No. 3 and even an imperfect one in the blue shale of 
zone No. 2; consequently if the layers of cone-in-cone are char- 
acteristic of the Cleveland shale, it appears that practically all 
of the above section is to be referred to that formation. Appar- 
ently all of the shale overlying the 24-ft. zone of blue shale (No. 6) 
with a thickness of nearly 373 ft. ought to be referred to the Cleve- 
land. 
Farther up the creek on its western (southern) bank on the 
Frank Landoll farm the Berea sandstone is shown and the follow- 
ing section was measured: 
