UF DENISON UMVKRSITV. 2^ 



destruction of almost all the life. Ag;iin there was a submergence and 

 the freestone of division II was deposited. In course of time con- 

 glomerate II was laid in the same way as conglomerate I had been, 

 then the Waverly s^^a had a long period of rest during which over 130 

 feet of sediment was deposited It is the object of this paper to show 

 how the different horizons were affected by such oscillations, and if 

 the strata in the northern part of the state cannot be most satisfac- 

 torily correlated on such an hypothesis. For convenience of compari- 

 son the same numbers for the different subdivisions will be used as are 

 given in the first section. The following section taken from I?ulletin 

 Vol. IV of Denison University, will give a correct idea ol the strata as 

 represented in Hanover Township, Ashland County : 



Shales, P/i /////* s /a scrraticaudata. 



Freestone and shale, . . . . 



CO.V GLOMERATE II, - 



Shale, SanguinoUtcs obliquus. 



Freestone. . . . . 



CONGl.O.MERATI:: I, ... - 



Waverly shale. 



Concretionary shales, . . . . 



As can be seen the portion above conglomerate I has undergone 

 scarcely any change, but a few facts observed are perhaps worthy of 

 notice. The part designated I II 2 is not as fossiliferous as at Newark, 

 Ohio, although the different species are represented and occupy the 

 same place as farther south. The layer above conglomerate II has 

 almost entirely lost its lithological character and fauna. Orhkiiloidca 

 pleiintcs bei:ig the only sjjecies found that could be referred to IIIi, 

 with that also occurs Discina magnifica, which is described beyond, 

 some specimens of which measure 2 's inches in length. Synni^(>i/urts 

 carieri is also found in this stratum, as that si>ecies occurs very rarely 

 above conglomerate II in Licking County. It would seem to indicate 

 that the barriers which held most of the si)ecies very closely in Central 

 Ohio, were beginning to disapi)ear. This, however, cannot be sub- 

 stantiated on stratigraphical grounds, as conglomerate 1 1 is as thick 

 here as in Granville Township. The freestone or II i of Licking 

 County is almost ten feet less in thickness than farther .south, and is 

 not as fossiliferous as in Licking County. In the Waverly shale (1 5) 

 no species have been found which coukl be referred tt) its ecjmvalent 

 farther south, but its position between the nodule layer and conglnm- 



