REPORT OF THE STATE PALEONTOLOGIST 1902 1171 



shales of the Schoharie section are not the thinned edge of the 

 Cobleskill of Herkimer county. I am of the opinion that the 

 pyritiferous shales of the Schoharie section can not be of an age 

 later than the Eurypterus beds of the Salina. In western New 

 York we have the Cobleskill following directly the Eurypterus 

 beds. The transition from the one to the other has previously 

 been noted. Specimens of Eurypterus from the Salina water- 

 lime of Erie county have associated with them Orthothetes 

 interstriatus and Leperditia s c a 1 a r i s, two fos- 

 sils common to the Cobleskill from Schoharie county westward. 

 At Union Springs somewhat similar conditions exist, while in 

 Herkimer county the Eurypterus beds are also in close proxim- 

 ity to the Cobleskill. These observations together with an 

 examination of the section at Sharon Springs makes it difficult 

 to conceive how the shales of the Schoharie section can be other 



than the Salina. 



The formational term Manlius 



The term " Waterlime group of Manlius " was introduced by 

 Vanuxem 1 and takes its name 2 from the two layers of water- 

 lime lying above the horizon of the blue limestones containing 

 the typical Manlius limestone fauna. That is we have in New 

 York State three distinct waterlime horizons, (1) the Salina 

 waterlime below the Cobleskill, (2) the Rondout waterlime above 

 the Cobleskill and (3) the Manlius waterlimes above the horizon 

 containing what is now recognized as the Manlius limestone 

 fauna. These upper layers of waterlime are of a somewhat 

 local development, a fact that was not clearly brought out by 

 Vanuxem and thus has arisen much confusion relative to the 

 position of the several cement horizons and they have generally 

 been treated without much regard to their stratigraphic rela- 

 tions. It should then be observed that included in the upper 

 portion of the original Manlius is a waterlime and that the group 

 was made to include all the Waterlimes of the vicinity having 

 a commercial value and not founded on any exact or even ap- 

 proximate stratigraphic or paleontologic determinations. It 



Nl 3d Annual Report. 1839. p. 272. 



2 Geol. N. Y. 3d Dist. p. 110. N. Y. State Geologist. 15th An. Report. 

 1898. p. 267. 



