DELAWARE COUNTY. — 293 
Beds the same as the Delaware stone. Mr. J. A. Clark’s is half a mile 
above Mr. Bieber’s. ; 
Between two and three miles below Stratford the Lower Corniferous 
appears on both sides of the river, and is described under the head of 
Lower Corniferous. But about fifty rods still further down the right 
bank, shows the Hamilton, or Upper Corniferous, again, having a thin 
and almost slaty appearance as the edges of the layers are exposed in the 
river bluff. In some parts these beds here are thickly crowded with 
Spirifera, Cyrtia, and Strophomena; these, indeed, being the only conspicu- 
ous fossils. These beds closely overlie the above mentioned Lower Corn- 
iferous, although the superposition could not be discovered, showing the 
continuance of Hamilton fossils well down into the Delaware stone. 
At a point about five miles and a half below Stratford, Mr. William 
Case has a quarry on the left bluff of the river, in beds at the horizon of 
the base of the Delaware stone. A little above this quarry a ravine 
joins the river from the east, its sides affording a fine connected section 
through the Olentangy shale, and the whole of the Delaware limestone, 
into the Lower Corniferous. The shale and overlying Huron are seen in 
ascending this ravine, about fifty rods from the river. Descending this 
ravine, and including the rock exposed below Mr. Case’s quarry, where a 
very prominent bluff is formed by the erosion of the river, the following 
succession of beds appears: 
SECTION THROUGH THE OLENTANGY SHALE AND HAmivtTon LimMesTonns, FIVE AND A 
Hauy Mites perow STRATFORD. 
No. 1. Black slate (Huron shale), seem............2006 « ssesees Gecrincehrpee Made 10 feet. 
“<2. Blue, or bluish-green, bedded shale; non-fossiliferous, em- 
‘bracing sometimes layers of black slate, like No. 1, of 3 or 
4 inches in thickness; poorly exposed (Olentangy shale), 
s¢ 3. Bituminous, dark biue, or black limestone ; nen-fossiliferous, 
rather rough, hard, and with some black chert, or flint 
GMs alirmestorenarerseencreteccrc Wek eclsh stececsen oie’ AE aoe ae 1 
“ 4, Thin, blue, tough, finely crystalline beds, containing eonsid- 
erable black chert, or flint, associated with pyrites; in the 
lower portion in beds of 4 to 16 inches; but little fossil- 
Mero mey Maly hIMMEST OIE) AWOUtssececocassnsn erereacceonsceescecces Sites 
*“ §. Beds 4 to 6 inches, slightly fossiliferous; embracing some 
bituminous, slaty shale in irregular deposits about crewded 
concretions (Hamilton limestone ?).............c006. seccsecee cesses 14 “ 
“ 6. Tough, bluish-gray, slaty beds of impure limestone, of the 
thickness of 4 to § an ineh, with considerable chert 
(CELE HOOUUb ROS) AAW EN A NAY dipy HU LEN A Rm Ma OUR le Ot Su AN Cah Sige 
