1166 



NEW YORK STATE MUSEUM 



Section near Port Jervis (Nearpass quarry section) 



For reasons which are more fully stated hereafter Mr Sehu- 

 chert proposed to include under the group term Manlius, the 

 Manilas or Tentaculite limestone, the Rondout waterlime and the 

 Cobleskill limestone as developed in the counties of Schoharie 

 and Herkimer. In the section about Port Jervis it is very evi- 

 dent that these limits have been greatly exceeded and that he has 

 included with the Manlius, strata which contain a fauna that 

 is unquestionably older than the fauna of the Cobleskill as devel- 

 oped in its typical sections. Below the Cobleskill in the Xear- 

 pass section there are 42 feet of shales and limestones. " The 

 diagnostic fossil of the lower half isChonetes jerseyen- 

 s i s , otherwise the fauna is that of the Cobleskill member minus 

 its corals" [p. 174]. It will thus be seen that not a single 

 Niagaran species is recognized in this section since according to 

 Mr Schuchert the Cobleskill contains no Niagaran species. This 

 however is not in agreement with determinations made by Bar- 

 rett, Weller and Whitfield, who have recognized Niagaran species 

 therein. The Bossardville limestone at the base of the formation 

 is correlated by Mr Schuchert with the Salina. 



Section at Rondout 

 The Rondout formation as originally defined was intended to 

 apply to the upper beds of the Salina characterized by an abund- 

 ance of Eurypterus. Since it has been shown that at the type 

 locality of the Rondout, the Wilbur limestone (— Coralline of 

 Hall) is not the equivalent of the Cobleskill but belongs to an 

 earlier age and stratigraphically lies below the cement bed of the 

 Salina as well as below the Cobleskill, it follows that in its type 

 locality the Rondout beds originally included the stratigraphic 

 equivalent of the Eurypterus bearing waterlime of the Salina. the 

 Cobleskill limestone and the Rondout waterlime as now restricted 

 to that portion lying above the Cobleskill limestone. The re- 

 stricted sense in which I have used the term Rondout may be the 

 same as the intended use of this term by Mr Schuchert, but in 

 the Rondout section he has failed to recognize the true Cobleskill, 

 and hence his application of the term Rondout here is with its 

 original limits and includes beds of Salina age, while in the other 



