OF DENISON UNIVERSITY. 
27 
destruction of almost all the life. xA.gain 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 Bulletin 
Vol. IV of Denison University, will give a correct idea of the strata as 
represented in Hanover Township, Ashland County : 
Shales, Phillipsia serraticaiidata^ - - - 20 ft. 
Freestone and shale, _ . . . 100 ft. 
Co.VGLOMERATE II, - - - - - 3 ft. 
Shale, Sangiiinolites obliquus, . . . 3 ft. 
Freestone. - - - - - - 27 ft 
Conglomerate I, - - - - iK ft. 
Waverly shale, - - - - 40 ft. 
Concretionary shales, - - - - 30 ft- 
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 III2 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, Orbiculoidea 
pleuntes being the only species found , that could be referred to IIIi, 
with that also occurs Disciua ??iaginfica, which is described beyond, 
some specimens of which measure 2^ inches in length. Syringoiheris 
carteri is also found in this stratum, as that species occurs very rarely 
above conglomerate II in Licking County. It would seem to indicate 
that the barriers which held most of the species very closely in Central 
Ohio, were beginning to disappear. This, however, cannot be sub- 
stantiated on stratigraphical grounds, as conglomerate II 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 (I5) 
no species have been found which could be referred to its equivalent 
farther south, but its position between the nodule layer and conglora- 
III3 
III2, 
II2. 
III. 
I5- 
!l4. 
