CORRELATION OF TYPICAL FORMATIONS 



393 



a Plesiosaur skeleton in the Edmonton, and by the characters of the in- 

 vertebrate fauna. 



WYOMING 



WESTERN 

 EUROPE 



NEW MEXICO 



Was ate A 



Tor re/ on. 



Puerco 



0/0 A /a/no ' 



\ 

 \ 

 \ 

 \ 



\\ 



\ 



\ 

 \ 

 \ 



Wasatch 



Tort Union 



Lance 



Fox Hills 



Pierre 



MONTANA 



Fori Union 



Hell Creek 



Fox Hills 



Pierre 



Judith P, 



Pierre. 



Ypresian 



Sparnaciar k 

 k 



Thanetian 



ALBERTA 



*Sira.ti^r<tphic position disputed. 



Pas/capoo 





Dan tan 



Edmonton 



Upper 

 Senonian 



Pierre 



Belly R. 



Pierre. 





Lower 

 Senonian 



Figure 2. — ApiJioxiinate Correlations of typical Formations of the late Cretaceous and 

 early Tertiary in Europe and icestem America based on their Vertebrate Faunas 



Kelations of the Judith Eiver Fauna 



On account of the disputed age of this formation it is better to rest 

 the vertebrate evidence on other faunae of unquestionable stratigraphic 

 relations. I may say, however, that the fauna described by Cope from 

 beds which Peale regards as equivalent to the Lance is unquestionably 

 closely allied to that of the Belly Eiver and of approximately the same 

 age. The attempt made by Peale to show that it is identical with that 

 of the Lance is based chiefly on a list of fragmentary specimens which, 

 as stated by Hatcher (American Geologist, 1903, page 374) are practi- 



