REPORT OF THE STATE PALEONTOLOGIST 1902 1167 



sections cited by him it is restricted to the waterlime above the 



Cobleskill limestone. For the upper Eurypterus-bearing beds 



of the Salina Mr Schuchert uses the term Bertie formation which 



was introduced by Chapman in 1864. This formation strati- 



graphically is equivalent to the basal portion of the original 



Rondout. 



Herkimer county section 



In the town of Litchfield the upper Eurypterus beds of the 

 Salina are exposed on the farm of Prof. C. P. Wheelock. Near 

 the outcrop of the Eurypterus beds, Wheelock's creek has its 

 origin. This creek flows north and joins Moyer creek near the 

 point where the Oneida conglomerate outcrops. It is along 

 Wheelock's creek that the following section was observed. 



Oneida conglomerate. Basal member very coarse, resting on 

 the Lorraine. After 5 feet of conglomerate there is an alterna- 

 tion of sandstone and conglomerate which finally grades into the 

 Medina. The pebbles are found quite abundantly for 45 feet. 



Medina sandstone. Above the conglomerate are about 70 feet 

 of Medina sandstone. In his section Schuchert states that the 

 Medina is absent. Likewise Vanuxem 1 and Hall 2 both state that 

 the Medina is not found east of Oneida county. It should be 

 observed, however, that Hall's statement appears to have been 

 based on the report of Vanuxem and the latter always considered 

 the Clinton as directly following the Oneida while the Medina 

 was described as below the Oneida. A single quotation from 

 Vanuxem's report [p. 75] will serve to show that he regarded the 

 Oneida as part of the Clinton. He says " The conglomerate forms 

 a part of the Clinton group, the next mass in order of super- 

 position." 



Clinton formation. The Clinton shales and sandstones are well 

 exposed and have a thickness not far from 150 feet. 



Niagara formation. The presence of the Niagara in this section 

 is of special interest in showing that at one of the original locali- 

 ties of the Cobleskill limestone we have both the Niagara and the 

 Cobleskill present, being separated from each other by the entire 



1 Geol. N. Y. 3d Dist. 1842. p. 72. 



2 Palaeontology of New York. 1852. 2: 4. 



