STUDIES FOR STUDENTS 



471 



theoretical considerations alone. Only extensive, critical study 

 in the field will furnish the data upon which the final conclusions 

 must be based. It will be well if the investigator shall enter the 

 field with a clear knowledge of the facts already known, with the 

 possibilities of the different modes of deposition and with the 

 criteria for distinguishing these modes well in mind ; and with a 

 willingness to be led to any conclusion to which the facts may 

 conduct him. 



CORRELATION TABLE 1 



Eocene 



Pacific Coast 



Interior 



European 



Upper 

 Middle 

 Lower 



r 



1 



Basal \ 

 I 



Foraminiferal 

 Shales (?) 



Arago 



Kenai (?) 



Tyee ) (? 

 Umpqua ) v ' 

 Tejon 

 Martinez 

 Puget 



Uinta 



Bridger (upper part) 



Brideer \ Brid g er - Huerfano (upper) 



s ) Wind River-Huerfano (lower) 



Wasatch 



Torrejon 

 Puerco 

 Fort Union 



Ligurien 



Bartonien 

 Lutetien 



Suessonien 



Thanetien 

 Montienj 



James Hervey Smith. 



1 Cf. Dall : Eighteenth Ann. Rep. U. S. Geol. Surv., Part II, table facing p. 334, 

 1897. Scott : Science, n. s., Vol. II, p. 499, 1895. Also Introduction to Geology, 

 p. 496. Osborn : Science, n. s., Vol. XI, p. 562, 1900. 



Many Eocene formations, not yet correlated, are omitted from the table. 



