96 GEOLOGY OF OHIO. 



Sandstone 11" 



Shale 2' 2" 



Sandstone 1" 



Shale Y 5" 



Sandstone Y 



Shale Y 10" 



Sandstone 9" 



Shale 2' 3" 



Sandstone 1' 



Shale 5" 4" 



Sandstone 7' 2" 



Alternation of fine-grained sandstone and shale 50 / 



Hubon Shale 35CK 



In southern Ohio the Waverly group is very largely developed, attain- 

 ing a thickness of not lees than five hundred feet, and being well exposed 

 in the valley of the Scioto. For the most part the outcrops lie on the east 

 side of the river, but the Waverly caps a great number of eminences 

 on the west side of the valley, specially the group of hills known as the 

 "Sunfish Hills," and these outliers extend as far west as the "mount- 

 ains" of Highland county. The details of the extent and structure of 

 the group in this part of the State will be found given in the reports of 

 Professors Andrews and Orton. As a general rule, the formation is here 

 composed of a series of alternations of sandstones and shales, and is not 

 susceptible of division into distinct members, as in the northern part of 

 the State. It is generally barren of fossils; but in certain localities, and 

 at certain horizons, it is highly fossiliferous. At Sciotoville, Rockville, 

 and Buena Vista collections of fossils have been made which rival in 

 variety and interest those obtained from Richfield, Lodi, and Weymouth, 

 in Medina county ; alarge number of species being common to the two ' 

 districts. Lists of the species collected at Rockville and Sciotoville 

 are given in the report of Prof. Andrews, in his contribution to our first 

 Report of Progress (1869). Prof. Andrews also mentions in his report 

 that two fossils, IAngula mbspatulata and Discina capax, are common to 

 the Huron shale and the " Waverly black slate " (Cleveland shale). This 

 is probably an error of identification, as, so far as yet known, the fossils 

 of the two formations are quite distinct. 



In the Waverly of Scioto and Pike counties certain layers of sandstone 

 are found which furnish one of the most beautiful building stones known in 

 the country. One of these, called the City Ledge, supplies a large amount 

 of stone to the cities of the Ohio valley, This lies immediately above the 

 black shale of the Waverly. Some of the flagging from the quarries of 

 W. J. Flagg, in the Waverly hills near the Ohio, and known as the Buena 



