I9I3.] STRATIGRAPHY OF PACIFIC COAST OF AMERICA. 601 



but if this is true it is difficult to explain why all the Tertiary and 

 older rocks exposed about its borders or at various points in it form 

 an integral part of a series of northward- or southward-dipping fault 

 blocks which cross its major direction at right angles. 



Notes on the Geological Formation Names Applied to the 

 Tertiary of the North Pacific Coast. 



During his work in 191 1 and 1912 the junior writer made a 

 special endeavor to visit as many as possible of the type-sections of 

 the formations described on the North Pacific Coast and data are 

 at hand to decide the age and status of practically all, as shown on 

 the accompanying table. Those not already discussed may be noted 

 chronologically. 



Thos. Condon, in Cope, 1880, " Corrections of the Geological 

 Map of Oregon. "•'^ The Astoria shales and Solcn beds have already 

 been considered in connection with the identity of the Astoria Series. 



C. A. White, 1888, 1899, "On the Puget Group of Washington 

 Territory"''^ and "The Mollusca of the Puget Group. ""^ Broadly 

 speaking the Puget Group is the equivalent of the Tejon Series. 

 It was described as a freshwater deposit, but this is hardly true. 

 While molluscan remains of any kind are generally scarce, several 

 species described as freshwater forms are well-known marine Tejon 

 species. Exactly how much of the Tejon is represented by the 

 Puget is somewhat uncertain, however, and will continue to be so 

 until the various floras are described and the species characteristic 

 of the different portions of the Tejon become known. The Pierce 

 County coal field where the Wilkeston section first described by 

 White is located, represents about 14,700 feet of beds. The lowest 

 2,000 feet at the Fairfax and Montezuma mines evidently belong to 

 the Chehalis formation judging by the flora. The upper 10,000 or 

 12,000 feet of beds (Carbonado, Wilkeston and Burnett formations) 

 are certainly later and probably represent the Olequa. The beds on 

 the Duwamish River near Allentown, eastward to Newcastle and 



60 ^»L Nat., XIV., 1880, p. 457. 



61 ^m. Jour. Sci. (3d sen), XXXVL, 1888, pp. 4^3-450. 



62 Bull. SI, U. S. Geo!. Sur., 1889, pp. 49-63- 



