1 7 8 



Cincinnati Society of Natural History. 



finely sandy. Beneath the Belfast bed are soft blue clayey strata, 

 containing more firm, nodular masses, with bryozoan remains showing 

 on their surface. About 15 inches below the base of the Belfast 

 bed, a limestone course contains Orthis occidentalism a lower Silurian 

 species. 



18. Fauver's Quarry — about two miles north of Dayton, west 

 of the pike continuing Main street. The Clinton is well exposed 

 at the quarry, both the upper and the lower contact being shown. 

 Beneath the Clinton are 22 inches of shaley blue clay underlaid by 

 20 inches of hardened blue clay, the whole representing the Belfast 

 bed. 



19. Keplinger Faun (Mark Allen's Quarry) — a little more than a 

 mile and a quarter south of Charleston falls, and on the National road, 

 about half a mile directly east of Tadmor, on the Dayton and Michigan 

 Railroad. The dwelling is now occupied by Mr. Keplinger. 



Here the Clinton was well exposed, but was not measured. 

 Beneath it were 24 inches of a fairly solid, massive, greenish blue 

 rock, the Belfast bed; 112 inches of a fairly firm, bluish or greenish 

 shale, clayey where more weathered, and 30 inches of a blue clayey 

 shale The base of the Clinton is about 80 feet above the level of 

 Tadmor station. At least 24 feet of Clinton rock are exposed here, 

 but the base of the Dayton limestone is not seen along the roadside 

 and the total thickness of the Clinton is probably greater. 



Going from this point a mile eastward, to the Troy pike, and 

 thence southward, Shoup's quarry is reached about 7 miles from 

 Dayton. Here the Springfield rock is worked; its base is about 28 

 feet above the base of the Dayton limestone, as seen about a quarter 

 of a mile due west. Reckoning at least 4 feet as the thickness of the 

 Dayton limestone, the following section is approximately true for this 

 part of the country : 



Clinton limestone from 24 to 27 feet. 



Dayton limestone 4 to 5 feet. 



Niagara shales (so called) 23 to 24 feet. 



Springfield limestone, 12 feet exposed. 



The Clinton is well exposed beyond the Dayton limestone quar- 

 ries, along the road, a quarter of a mile due west of Shoup's quarry. 

 Here Phcenopora expansa and Ph. magna were found. The base of 

 the Clinton was not well seen. The Clinton is also seen at two 



