PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. VI, No. 3, pp. 41-52. May 6, 1916 



III 



THE OLIGOCENE OF KITSAP COUNTY. 

 WASHINGTON 



BY 



Charles E. Weaver 

 Assistant Professor of Geology, University of Washington, Seattle 



INTRODUCTION 



The purpose of this paper is to place upon record the re- 

 sults obtained from geologic and paleontologic studies made 

 in Kitsap County, Washington, along the north and south 

 shores of the entrance to the Bremerton Navy Yard. Because 

 of the isolated occurrence of pre-glacial outcrops, it seems 

 desirable to select small areas of importance and to investi- 

 gate the geology of them in as much detail as possible. The 

 area involved in this study is located six miles west of Seattle 

 and is of special importance because of the occurrence there 

 of the most complete and representative section of the Oligo- 

 cene within the Puget Sound basin. With the exception of 

 the exposures along the south side of the Strait of Juan de 

 Fuca, it is the most complete within the state. 



The surface rocks in the larger portion of the Puget Sound 

 basin are composed of deposits of glacial drift. In a number 

 of small and isolated areas the older pre-glacial bedrock for- 

 mations project up through the drift. Such exposures are 

 usually found in the form of low sea cliffs or in the canyons 

 of certain streams. The region under investigation is one of 

 such areas. 



May 6. 1916 



