THE FACTS 



379 



from the Oswegan and it is Silurian and not Ordovician ; hence I place 

 it at the bottom of the Silurian; it is evidently Lower Wenlockian. It 

 bears affinities with the New York Niagaran, and that is about as much 

 as can be affirmed at present as to its relations. 





New York . 



(after Hartnagel, 



1912) 



Maine 



(H.S.Williams, 



1912) 



England 

 (after R. Etheridge, 



1888) 





Chemung and Catskill 



Perry 





Devonian 



X X X X X 

 X X X X X 

 X X X X X 



(Absent) 



Devonian or. old red sand- 

 stone 







Eastport 







f Manlius 



n„„.„,o„ J Rondout 

 Cayugan^j Cobleskm 



tSalina 



Pembroke 



Dowhtonian or 



Temeside 

 Upper Ludlow 



Lud- 

 low 



1 





Edmunds 

 Dennys 



Aymestry 

 Lower Ludlow 



Silurian 



fGuelph 

 | Lockport 



NijumranJ Clm ton (in- 

 JNiagaranj cluding Ro _ 



J Chester shale 

 t at top) 



Wenlock limestone * 





Quoddy 



(not younger 

 than Wen- 

 lock shale) 



Wenlock shales 1 Wen- 

 Woolhope j lock 

 Upper Llandovery J 





f Medina (in- 

 | c 1 u d i n g 

 Oswegan \ Oneida con- 

 | glomerate) 

 I Oswego 



Ordovician 



Cincinnatian 



Mohawkian 



Canadian 





Lower Llandovery 

 Caradoc or Bala 

 Llandeilo 



So far, there is little difficulty in establishing the general relationship 

 pf the faunas to well known faunas in the formations of New York and 

 other points of the North American continent. 



The difficulties arise when the attempt is made to establish precise 

 time-relations between these formations of the Eastport area and those 



