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



ei'ton Inlet and the highest beds along the north shore of the 

 entrance to Blakeley Harbor. 



Top of Section 



Feet 



Massive, coarse grained conglomeratic sandstones containing numer- 

 ous lenticular bands of conglomerates. Occasional, narrow bands 

 of clay shale are interbedded 1,300 



Sandy shales exposed beneath the waters of Blakeley Harbor 1,400 



Brownish gray, massive to slightly bedded, sandy shales as exposed 

 along the south shore of Blakeley Harbor for a distance of one- 

 half mile northwesterly 2,400 



Shaly sandstone grading in places into a shale. Stratification well 

 defined. Upper portion of this belt is located at Restoration 

 Point 1,200 



Shaly sandstones gradually becoming more sandy in depth. Bedding, 



very distinct 450 



Massive, sandy shales 350 



Massive, brownish-gray, coarse grained conglomeratic sandstones and 

 interbedded bands of coarse conglomerate, the pebbles of which 

 attain a diameter of two feet. Many of the pebbles are composed 

 of basalt and others of light colored shale and sandstone 1,800 



Total 8,900 



SEQUENCE OF FAUNAS 



In the report by Arnold and Hannibal on the "Stratigraphy 

 of the North Pacific Coast," deposits of Oligocene age are re- 

 ferred to as the Astoria Series. This series is divided into three 

 divisions, namely: the San Lorenzo, Seattle and Twin River 

 formations. The distinctions between these formations are 

 largely based upon difterences of faunas rather than upon lith- 

 ologic grounds. In the opinion of the writer, it would be 

 preferable to refer to these divisions as faunal zones rather 

 than formations. The application of the term San Lorenzo 

 formation to the deposits described as such in Washington 

 seems hardly justifiable. The type locality for the San Lorenzo 

 is located in the Coast Ranges of California. Whether the 

 strata assigned to the San Lorenzo in western Washington 

 represent a part, all, or more than tliat, belonging to the for- 

 mation in California, has not been determined. Until such 

 information is available it would be misleading to make such 

 direct correlation. If future in\estigations should prove that 

 the deposits were formed contemporaneously, the term could 

 with justice be introduced. Studies made by the writer on 



