Vol. VI] WEAVER— EOCENE OF LOWER COWLITZ VALLEY 15 



The above listed faunas are typically Tejon. The Cowlitz 

 phase of the Tejon as represented at Locality No. 1 on the 

 Cowlitz River one and one-half miles east of Vader was in a 

 previous paper by the writer regarded as older than the Tejon, 

 and more closely related to it than to the Martinez of California. 

 Since the publication of that report more extensive collections 

 have been made, as well as more detailed stratigraphic studies. 

 The faunal evidence now points directly to its Tejon age. Dr. 

 Dickerson*' believes it is to be correlated with the type Tejon 

 of Grapevine Canyon in southern California. He considers it 

 to represent the middle division of the Tejon or Rimella sim- 

 plex zone. 



Arnold and Hannibar in their report on "The Marine Ter- 

 tiary Stratigraphy of the North Pacific Coast of America" 

 consider two divisions of the Tejon to be present in the Ole- 

 quah Creek region. The lower division or Chehalis formation 

 is described as occurring at "the bluffs along Cowlitz River 

 below the mouth of Drew Creek, one and one-half miles east 

 of Olequah." It is apparent that they must have meant Vader 

 rather than Olequah, as Cowlitz River is less than one-half mile 

 east of Olequah, and the only rock exposures in that region are 

 deposits of Pleistocene gravels and sands. Their faunal local- 

 ity. No. 113, is probably the same as Locality No. 1, la, 232 

 and 233 of this report and California Academy of Sciences 

 Localities Nos. 182 and 183, as referred to in Dr. Dickerson's 

 report. Detailed stratigraphic measurements made with a 

 transit show that the strata occurring at the above mentioned 

 localities are stratigraphically higher than the strata exposed 

 along Olequah Creek from a point two miles north of Vader 

 southward to Olequah. The type locality of the Olequah for- 

 mation as described by Arnold and Hannibal "extends from the 

 Erwing ranch a little over two miles above Little Falls south- 

 ward down Olequah Creek to Olequah, a distance of about five 

 and one-half miles." 



In this area, where both the Chehalis and Olequah forma- 

 tions are described as occurring by Arnold and Hannibal, strat- 

 igraphic evidence shows their lower division or Chehalis for- 



Ph,c!PH''?K^°^' •^'■•r?- ^•' r'^,?r""?.°^ ^^^ "^^P^ ^ejon: Its Relation to the Cowlitz 

 pp 39-51 " ""'^ Washington." Gal. Acad. Sci. Proc. 4th series, vol. 5. 



'Op. 'Cit. 



