178 



University of California Publications. 



[Geology 



Below these is a system of fine-grained sometimes shaly rocks of 

 delicate gray, huff and greenish colors, containing calamites. 

 which Professor Condon calls the Calamite beds. Their age is 

 undetermined. ' ' 



In his monograph on the Tertiary Vertebrata, Cope 14 writes 

 of the White River and John Day: "The eastern area of this 

 formation is the true White River epoch of Hayden ; the western 

 deposits form the Truckee epoch of King. I named this forma- 

 tion the Oregon, but Mr. King's name is the older and must be 

 retained." 



"According to Professor Condon, the Truckee formation of 

 Oregon, on the John Day River, rests unconformably on the 

 laminated beds containing Taxodium and fish remains, which, as 

 I have suggested on a previous page, may be an extension of the 

 Amyzon shales. These in turn rest on a formation of hard 

 laminated beds, which contain an abundance of calamites, which 

 doubtless belong to the Triassic or Jurassic period. The Truckee 

 beds are, like the true White River, overlaid by the Loup Fork, 

 and this in turn by heavy beds of basalt." 



The beds at Van Horn's ranch containing fish remains, which 

 Cope assumed were to be correlated with the Amyzon group, 

 were referred by Lesquereux" to the late Miocene and are now 

 known as the Mascall formation. The Calamite beds were placed 

 by Lesquereux in the Eocene and are undoubtedly the Clarno. 

 Cope's error in correlating the beds containing the fish remains 

 with the Amyzon group arose from confusing the Mascall with 

 the Clarno. 



In the monograph referred to above, 10 Cope proposes the 

 following table of equivalent European and American horizons : 



West Europe North America 



Oeningian 



Oeningian 





Lonp Fork 



Procamelus beds 



Tortonian 



Falunian 



>* 



Ticholeptus beds 



Langhian 



< 







rERT] 





Truckee 



Aquitanian 



Aquitanian 



White River 







Stampian 



Tongrian 







White River 



14 U. S. G. S. of the Terrs. Report, Vol. 3, p. 15. 

 15 Proe. TJ. S. National Mus., Vol. 11, p. 13, 1889. 

 10 Tertiary Vertebrata, table opposite p. 43. 



