DELAWARE COUNTY. 297 



to appear somewhat bituminous and of a dirty or brown color when con- 

 stantly wet, but under the weather it becomes a light buff. The upper 

 half of this stone is in beds of two to four inches, the lower in beds of 

 one to three feet. Near the bottom it becomes arenaceous, and even con- 

 glomeratic, passing into the Oriskany sandstone, which has a sudden 

 transition to the Waterlime of the Lower Helderberg. It seems to have 

 many of the lithological features and the persistency of the Onondaga 

 limestone of New York, and may be provisioiaally parallelized with that 

 formation The fossils are generally absorbed into the rock, casts or 

 cavities only remaining; yet a Cyathophylloid and a coarse Favositoid 

 coral have been seen.. 



Where the Scioto crosses the southern boundary of the county the fol- 

 lowing section was taken, in descending a ravine from the east, on the 

 land of Abram Butts : 



Section near the South Line op Delaware County, in the East Bank of the 



Scioto. 



No. 1. Delhi beds ; this stone is very fossiliferous. It is hard, sonor- 

 ous, and more or less crinoidal, some joints being seen in 

 almost every fracture. It is light-colored, rarely showing a 

 blue or a bituminous tint. It presents mural surfaces, with 

 a crumbling disintegration, under the weather, the pieces 

 falling out being an inch or two across. This is a charac- 

 teristic of these beds (Corniferous limestone) 20 ft. 



" 2. Cherty beds of two to eight inches, of very much the same 

 texture and color as No. 1, but almost without fossils (Onon- 

 daga ltmestone?) 10 " 



" 3 Heavy-bedded, even, magnesian limestone ; fit for a cut-stone ; 

 sometimes popularly called sandstone ; beds eight to twenty 

 inches, but including some thinner and more bituminous 

 layers about midway, embraced in the thickness of about a 

 foot; this has a light buff color when long exposed, but if 

 much wet it shows a brown color, with bituminous films ; 

 no fossils seen ; no chert (Onondaga limestone ?) ; seen 14 " 



Total 44 " 



These beds, or similar ones, are more or less exposed from the county 

 line northward, along the banks of the Scioto, as far as to Millville. 

 About eighty rods south of Sulphur Spring Station the Delhi beds strike 

 away from the river toward the east, the river running on the lower 

 member (No. 3) of the last section. But about a mile above the Springs 

 these beds return to the left bank of the river, giving it a height, includ- 

 ing the underlying magnesian beds, of about forty feet. 



About two miles below Sulphur Spring Station is John Spero's quarry, 



