374 C. R. STAUFFER ORISKANY SANDSTONE OF ONTARIO 



(Conrad), RhijndoNieJIa musculosa Hall, Hippariomjx proximus Xslti- 

 uxem, Meristella lata Hall, Leptostrophia magnifica Hall, Leptostrophia 

 magniventra Hall, Rensselceria ovoides (Eaton), Rensselceria caynga 

 Hall and Clarke, Platyceras nodosum Conrad, Platy stoma ventricosa 

 Conrad, etcetera. In fact about all of the most characteristic forms of 

 the central and western ISTew York Oriskany occur here. 



During the course of a half dozen or more days collecting at this 

 place, some of the time with the assistance of Mr. Walter A. Bell, a fair 

 collection from all beds was made. A single specimen of Strophonella 

 ampla was found occurring in such relation to Spirifer arenosus as to 

 make it seem probable that the two species lived at the same time. How- 

 ever, since this find Avas made at or very near the top of the sandstone, 

 it may not be significant of anything. Then, too, it is to be remembered 

 that Spirifer arenosus has been found in the Onondaga limestone and 

 Strophonella ampla at least as low down as the Schoharie grit. In the 

 sandstone there was also found a coral belonging to the genus Favosites 

 and resembling quite closely Favosites turhinata of the Onondaga lime- 

 stone. A study of this form, however, has made it seem more than prob- 

 able that it is a different species. The arenaceous chert and cherty 

 limestone overlying the sandstone carry a pure Onondaga fauna with 

 not a, single species, other than long range forms, properly belonging in 

 the Oriskany. It is true that man}^ specimens of Onondaga fossils can 

 be obtained from rock which is more sandstone than limestone, but in 

 every case Avhere these have been obtained in place they have been found 

 to occur above tlie Oriskany and never mingled with that fanna. 



SANDSTONE OF WALPOLE TOWNSHIP 



Ten miles farther west, near the village of Springvale, Walpole town- 

 ship, there is another outcrop of sandstone resembling very closely that 

 just discussed. It occurs as a narrow surface outcrop, extending for a 

 distance of several miles, and consists of about 8 feet of coarse white to 

 yellowish sandstone, with hard white masses resembling quartzite, as at 

 the previous locality. This sandstone usually rests on several feet of 

 cherty material, which at places where the base is exposed is found to 

 rest unconformably on the Silurian limestone. This latter shows the 

 sand penetrating cracks, etcetera, as previously mentioned — that is, the 

 base of the Devonian and the horizon of the true Oriskany sandstone 

 apparently lies below the chert. The sandstone near Springvale is over- 

 laid by arenaceous chert and cherty limestone, which appear to be the 

 same, both lithologically and faunally, as those beds overlying the Oris- 

 kany sandstone 10 miles farther to the east. One difference, however, 



