An Account 0/ the Middle Silurian Rocks of Ohio and Indiana. 



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shale bed mentioned above were 60 inches of shale, blue and brown 

 in color, interrupted towards the top at two levels by a course of 

 harder material about one and a half inches thick. At this depth the 

 regular Cincinnati limestone beds had not yet been reached. But it 

 is evident from data furnished above that only a very small thickness 

 of this section could under any circumstances be referred to the 

 Belfast bed. 



A fine section exposed at the falls in the Stillwater, a short 

 distance north of the village was not visited. 



26. New Paris. — Going from New Paris to the western margin 

 of the town, the Springfield rock is exposed on the southern side of 

 the road. A quarry shows about 25 feet of this stone, and the 

 material here obtained is used for the manufacture of lime. On the 

 northern side of the road, about a sixteenth of a mile distant, along a 

 lane, the Dayton limestone is exposed. It possesses all the character- 

 istics of the same horizon at Laurel, Indiana, where it forms the 

 typical exposure for the so-called Laurel bed. Its upper courses are 

 frequently interbedded with chert layers. Crinoidal fragments are 

 not uncommon here in certain layers of small vertical and lateral 

 extent. The lower part of this formation is made up of thicker 

 courses, without the interbedded chert beds, or at least with compara- 

 tively little chert material. Still farther north, on the north side of 

 the creek, near a fork in the road to Richmond, the Clinton is 

 exposed. 



27. Euphemia. — Euphemia is about a mile north of Lewisburg, 

 on the road to West Sonora. About half a mile northwest of 

 Euphemia, near the railroad, are the quarries of I. J. Weaver. Only 

 one or two feet of Springfield rock are exposed and are burnt into 

 lime. Below this are eleven feet of a magnesian limestone, hard and 

 blue when fresh, showing along many courses an abundance of small 

 crinoid remains. This rock corresponds to the upper half of the 

 Dayton stone at New Paris with its interbedded chert remains. At 

 Weaver's quarry there is no chert, but the narrow bedding of the 

 rock is similar. Beneath is found a foot and a half of harder blue 

 clay, underlaid by two and a half feet of a softer blue shaly clay. 

 Below this are found eight and a half feet of good quarry stone, 

 corresponding to the lower half of the Dayton stone as exposed at 

 New Paris. Underneath the Dayton stone occurs the Clinton, 



