344 CHARLES S. PROSSER 
writer to favor its reference to the Berea. Again, a little above the 
highway and the trolley line, is a knoll a few rods south of the 
stream, composed of Berea sandstone which shows more or less 
concretionary structure and ripplemarks. The base of the lowest 
outcrops in this knoll is 83 ft. above creek level, while a few rods 
farther up stream on the opposite bank is the section described 
above in which the shale runs down into the creek, no sandstone 
being shown in this section of at least 25% ft. 
In the various sections studied in the vicinity of Norwalk the 
writer has regarded the upper zone of black shale of the Ohio, No. 
18 of the above section, as the western continuation of the Cleveland 
shale, or at least as representing part of it. It is perhaps a question 
at what horizon the line of division between the Cleveland and 
Huron shales is to be drawn; because if all the shale above the 
lowest layer of cone-in-cone (zone No. 12 in this section) is to be 
included in the Cleveland, then its lower part will contain some 
layers of gray to blue shale. If the base of the lowest layer of 
cone-in-cone in the above section be considered the base of the 
Cleveland, then it will extend 4 ft. 1 in. below the base of the upper 
thick zone of black shale. . 
Farther up the stream, on its northern (eastern) bank and a 
few rods below the old Cole quarry, the following section was 
measured. The old quarry is below the highway passing the 
J. A. Miller house. 
SECTION ON VAUGHN’S CREEK BELOW THE COLE QUARRY 
No. THICKNESS _TyrcENESS 
Ft. In. Ft. In. 
mr blacks handeyslartayas tall eis ee ter eet ieie aerate ne IES oS 24 5 
TOs Blue shale Wun le weenie Er am a inc we reeml en cba rise ie 6 5 
oF Billick ySlralle s2he raat cay sls pects seve eraeay tes ae a I fo) 6 Be 
8. Black shale but much softer than most of it... II 5 35 
Fol lackrshalerystehwem hanes t et wiersie cate Gr eae meee 2 6 4 43 
6: ;;Blwe Shaler fear croarone nasties cea eaeiee as 35 I 103 
5. Lenticular layer of cone-in-cone varying in 
thickness:iromy o}toss inser emia eee re fH 2 ar 7 
A. Blacks Shall era euent alan. salina tact engl salar ae 63 I Oe 
3:1 Blue ishalen san Weer dake caster aan a tive cee eaeprt a Os 10z 
2." Black shales cic aie qakel ccs oa sence era ge palate 3 8 
ie blue shalertoscreekileviel a ues ae ete eer aon 5 5 
