38 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



The reader is referred to the papers by Clark and Stanton 

 for a more complete review of the literature concerning the 

 age and correlation of the Tejon. 



Anderson^^ mapped an area in the southern end of the San 

 Joaquin Valley which included the Type Locality of the Tejon 

 group and he described the stratigraphic relations there. 



Weaver^^ first discovered and described the Cowlitz phase of 

 the Tejon group in Washington. The interesting new species 

 described by him in this paper were so numerous that the com- 

 plexion of the fauna suggested that a new phase of the Eocene 

 was discovered on the Pacific Coast and he named the rocks 

 containing this fauna the Cowlitz formation. Since then Dr. 

 Weaver has withdrawn this formational name, and he now 

 recognizes these strata as a member of the enormously thick 

 Tejon group of Washington. 



Arnold and Hannibal~° listed species from Weaver's type 

 locality and included the strata which yielded this fauna in the 

 "Chehalis formation, Tejon series." They state concerning the 

 fauna of their Chehalis formation that "No equivalent strata 

 have been recognized elsewhere in the northwest but the Tejon 

 of the type locality near old Fort Tejon in California evidently 

 represents the same faunal stage. In many respects the Che- 

 halis fauna is similar to that of the succeeding Olequa forma- 

 tion, but the floras are markedly dififerent, that of the Chehalis 

 formation lacking the distinctly tropical facies of the later 

 divisions of the Tejon, and thus affording a most characteris- 

 tic feature." If the plants were found at horizons of about 

 the sam'6 age as the marine beds then the foregoing conclu- 

 sions concerning climate do not agree with the evidence of the 

 marine shells, which indicate a warm temperate or subtropical 

 condition. It is possible that the plant beds are not the same 

 in age as the marine beds of the Cowlitz phase. 



" Anderson, R. V., "Preliminary Report on the Geology and Possible Oil Resources 

 of the South End of the San Joaquin Valley, Cal.", Bull. 471, U. S. Geol. Surv., pp. 

 117-119, 1912. 



•• Weaver, C. E., "A Preliminary Report on the Tertiary Palaeontology of Western 



Washington", Bull. IS, Wash. Geol. Surv., pp. 12-15, 1912. 



^° Arnold, Ralph, and Hannibal, Harold, The Marine Tertiary Stratigraphy of the 



North Pacific Coast of America, Proc. Am. Phil. Soc, vol. 52, pp. 567-569, 1913. 



