CORRELATION OF THE CENOZOIC 



207 



with the Lutetian and the Upper Bridger with the Bartonian of 

 France. The precise survey of the Hfe-zones of the Bridger by 

 Granger and Matthew marks one of the greatest advances of recent 

 times. 



Similarly under the direction of the present writer the Washakie 



Diplacodon 

 zone 



Diplacodon 



Artlodactyla and chief collection 

 of Uinta mammals(small) 

 Dipl acodon 



f_ Dolichorhinus cornutus, 

 chief fossiliferous le^'el 

 Amynodon 



Eohasileiis 



zone /vietarhinus 



"^^^^mmiM'MrW ^ ~ ^'"'^^ fossiUferous level 

 Metarhinus 

 J into] - 



Fig. 3. — Columnar section of the Uinta formation, northern Utah. In A and B 

 the diagram does not properly represent the irregular nature of the so-called sand- 

 stones and clays, which are probably in part coarser and finer volcanic-dust deposits. 

 Modified from notes by O. A. Peterson, 1894. Faunistic studies of Osborn. 



of central Wyoming has been surveyed precisely by Granger, proving 

 that the Lower Washakie is identical in age and in its mammalian 

 life with the Upper Bridger and broadly corresponds with the Barto- 

 nian, or closing stage of the Middle Eocene of France. We are now 

 in the Uintatherium Zone, all the famous discoveries of Cope and 



