HURON AND CLEVELAND SHALES OF NORTHERN OHIO 345 
At the upper end of the above section the shales are dipping 
down stream; but farther down where the high bank of upper 
black shale occurs they are nearly horizontal. In the above 
section the base of the lowest cone-in-cone layer (zone No. 5) is 
5 ft. below the base of the thick zone of black shale at the top as 
compared with the 4 ft. 1 in. in the lower section. This bank 
is apparently the one that Read referred to as some 15 or 20 rods 
directly north of the Cole quarry, the black shale “in position at 
the same level [as the quarry]; the strata horizontal and undis- 
turbed.’”* The old quarry was in the Berea sandstone and is 
apparently another locality on this stream showing channel filling. 
Sections on Rattlesnake Creek near East Norwalk.—On Rattle- 
snake Creek near East Norwalk, about 3 miles northeast of the 
courthouse in Norwalk, is an excellent section. It is on the eastern 
bank of the stream a few rods above the Cleveland, Southwestern 
& Columbus Ry. bridge and the house of Mr. Peter Shoon (spelled 
Spohn on his mail box). There is a marked anticlinal fold and the 
following section was measured near the center of the curve in 
the bank: 
SECTION ON RATTLESNAKE CREEK NEAR East NORWALK 
ee TOTAL 
No. THICKNESS THICKNESS 
Ft. In. Ft. In. 
pepeelard. slaty black shale... 8.5.0.5.055.%4% 17. 54 5 
11. Soft, olive to blue, argillaceous shale......... 2 2 a4 & 
to. This is probably mostly blackish shale, but not 
sovhard asthe Upper Zone... .. cs ae es nr) 35 a 
9g. Mainly soft argillaceous, blackish shale but at 
base hardback shales ons. el. Sele. Bs 
8. Bluish-gray layer, 3 in. or less in thickness, 
with rather poor cone-in-cone — structure. 
Higher on the bank is another cone-in-cone 
layer, but its position in one of the above zones 
PasmMOinGekenmlmeds £ civ celiac a ss Se ee ss =f 3— 23 3 
7. Black shale, on the second east bank above 
this section and about 14 ft. above the sub- 
jacent zone of blue shale, is a more or less con- 
cretionary layer of cone-in-cone with a thick- 
MESseVatyine1roml OviO!F == WM... as oe 6 fo) 23 fe) 
nr 
12) 
28 B 
‘Geological Survey of Ohio, III (1878), 304. 
