30 



BULLETIN OF THE LABORATORIES 



conglomerate II, which has thinned out, is approximately indicated by 

 the presence of Allorisma luincJieUi. 



White sandstone, 



Blue shale, - c - • 



( Sandstone, - - - - 



( Sandstone, . . - - 



Concretionary zone, - - - 



Ascending the Killbuck a short distance we find along Shade 

 Creek, which empties into the Killbuck from the west the above sec- 

 tion. About twenty feet of white sandstone containing Schizodus new- 

 arkensis ? and an undetermined species of Orthis forms the top of the 

 section. The blue shale underlying it, is better exposed here than in the 

 section last mentioned and contains numerous fucoids. The thirty 

 feet of sandstone overlying the concretionary zone contains 

 Productus semirdiculatus (which only occurs in III and III 2 in Central 

 Ohio.) Whether these flags belong to !Ii or I II 2, is doubtful, as no 

 line can be drawn between them on any organic evidence. It seems 

 probable, however, that the lower portion belongs to II i, as fossils 

 occupying that height occur farther north. The Waverly shale has 

 thinned out at this locality. The concretionary zone is represented 

 by Syriopeden nodocostatiis, Chondes tuinidas and Ptci'inopecten cari- 

 ni ferns. About one mile from where Shade Creek empties into the 

 Killbuck, and four and one-half miles south of Burbank, in a ditch 

 1)}' the road side, Spirifer biplicatus and Productus dupUcostatus were 

 found, both of these species occur in the middle part of division III 

 in Licking County, as they are found on the same altitude as the upper 

 ])art of the sandstone overlying the concretionary zone in Shade Creek, 

 it would seem to indicate that the upper part belongs to that period. 

 The lithological features are however entirely different from the flags at 

 Shade Creek, and resemble the exposure at Burbank, Ohio. Two 

 miles south of Burbank and a little below the last exposure, Sangtiin- 

 olitcs naiadiformis and Pdf?io>nHa tapcRiformis were found. The 

 former sj)ecies occurs in II i, in Licking County, while the second was 

 described by Meek, from Richfield, Summit County, it has not been 

 found in Central Ohio. On the Killbuck, a short distance southwest 

 of r)url)ank, occurs the Cuyahoga shale of the Ohio geologists. This 

 horizon would include the stratum last mentioned. At Burbank, Spir- 

 ifer biplicatus, Productus 7ie7vberryi and Heniipronites cenistria are the 



