342 CHARLES S. PROSSER 
graphically below the base of the Cleveland shale and consequently 
all of the 203 ft. of shale down to the Prout limestone belong in the 
Huron shale. 
SECTIONS AND DESCRIPTIONS OF CLEVELAND SHALE AND 
RELATED FORMATIONS 
FROM NORWALK TO BLACK RIVER 
Sections on Vaughn’s Creek south of Norwalk.—As already 
stated, Dr. Kindle has limited the term Cleveland shale to the 
higher beds of the Ohio shale in which the spherical concretions “do 
not occur and in which the cone-in-cone structure does occur.’”* 
So far as the writer’s observations have gone, this appears to be 
true of the deposits in northern Ohio and he saw no cone-in-cone 
lenses in the shales on Huron River and Slate Run. The highest 
outcrops of black shale, however, south and east of Norwalk 
contain lenses of impure limestone with cone-in-cone structure. 
The following section on the northern bank of Vaughn’s Creek, 
about 12 miles south of the court house in Norwalk and a few rods 
above the Sandusky, Norwalk & Mansfield trolley bridge, was 
measured: 
SECTION ON VAUGHN’S CREEK SOUTH OF NORWALK 
THICKNESS Toran 
THICKNESS 
Ft. In. Ft. In. 
18. Black, hard, slaty shale. Farther up the creek 
20+ ft. of this shale are shown with a little 
CONe-iIN=cOne StHUGtUe ae Amen ieee eae MOSSE. os. 25 9 
17.) Dark pray Shales hos h 1 yoy se cree petayae 4 15 ) 
TO) Blackeshalen sets inuet (\suic nth eter ebe nears 6 15 5 
Te Blue Shale eases yaar steiner fem ne eens his 8 14 ma 
TAUB acl shale way eee ge ea. iat erase pate pars ce 2 2 14 3 
13) sBlue shales fromysiitova a tne thickness) sera 3 12 I 
12. Layer of cone-in-cone, lens-shaped masses 
thinning out and reappearing again at the same 
INOAPAD VOL, TKO CKO) Bor Wa, WGK. ooo oon sacs oo a 2 eTeh ae) 
TE Blackishalefromps econo) emt C kyle ae ye Sop it 8 
ro, Gray, Shale. tromy2) toysyinst hick aa rer ee Wee 23+ 11 25 
9." Black Shaley si jged Siberia eltcnate aa eehontaicinas ame B ae fe) 
8. Gray shale with some thin layers of black from 
LO;tO PSV EBICKe ReMi y eat cee ite meaartie Riel ee I 5 10 9 
t American Journal of Science, 4th ser., XXXIV, roo. 
