372 C. R. STAUFFER ORTSKANY SANDSTONE OF ONTARIO 



iiized ill tlie overlying Cornileroiis (Oiioiulaga) liiiiostoiie." ^ Scliii- 

 chert's list of Oriskaiiy fossils, made up from HalFs collection, indicates 

 a mingling of Oriskany and Onondaga fossils in the Ontario outcrops. 

 Out of seventy-six S23ecies listed for the Oriskany of Canada, fifty-two 

 are reported to pass from it into the Onondaga limestone.^ Somewhat 

 later, in referring to the above mentioned list, Schuchert says, "When 

 this work was in hand it was apparent that there had been some mixing 

 of Corniferous (Onondaga) corals with those of tlie Oriskany fauna 

 and a number of species were then eliminated. It now appears that 

 more of these corals must be removed from Professor Hall's Oriskany 

 collection." ^ He then gives a revised list, dropping ten species, but still 

 retaining forty-two as common to the two formations. It is interesting 

 to note, as indicated by Whiteaves,' that most of the collection from the 

 Ontario Oriskany, now in the museum of the Geological Survey at 

 Ottawa, was made by Mr. John De C^ew, a civil engineer and amateur 

 geologist. It seems that Hall's collection, on which Schuchert's list was 

 based, came from the same gentleman, and any one who has visited the 

 field in question knows how easily a person might confuse his collections. 

 While discussing the Oriskany and Onondaga faunas in their paper on 

 "Paleozoic Seas and Barriers in Eastern Xorth America," Ulrich and 

 Schuchert state, "The Oriskanian invasion attained the last locality 

 (near Cayuga, Ontario) about the same time that the Onondaga inva- 

 sion, coming in from the southwest, arrived there, the result being tbat 

 the Onondaga and late Oriskany faunas, originally very dissimilar in 

 character, became one, making together what is now known as the east- 

 ern Onondaga fauna. The blending of these two different faunas (Oris- 

 kany and Onondaga) can be seen to best advantage in the townships of 

 Oneida and Xorth Cayuga, Ontario, where there is a sandstone filled 

 with late Oriskany fossils. The sandstone rapidly j^asses into a sandy 

 limestone and then into the typical Onondaga limestone. . . . Out of 

 seventy-two species found here (in the Oriskany) not less than forty- 

 two pass up from the lower horizon into the Onondaga." ^ Still later 

 Weller writes, "The mingling of the Onondaga and Oriskany faunas in 

 western Ontario . . . suggests that this was the first point of contact 

 between the immigrant fauna (Onondaga) and the preexisting Oris- 

 kany." ^ Others might be quoted, but these statements are sufficient to 



* H. C. Nicholson : Idem. p. 8. 



s Charles Schuchert: 8th Ann. Kept. N. Y. State Geologist. 1888 (1880). pp. .-l-r)4. 

 8 Charles Schuchert : Bull. Geol. Soc. Am., vol. xi. 1900. p. 324. 

 ' J. F. Whiteaves : American Geologist, vol. xxiv. 1899, pp. 228. 229. 

 " E. O. Flrich and Charles Schuchert: N. Y. State Museum Bull. o2 (Pal. G). 1901 

 (1002). pp. 052-053. 

 » Stuart Weller : .lournal of Geology, vol. xvii, 1009, p. 261. 



