Memoirs Cal Acad. 5ci Vol hi. 



[Arnold] Plate XXV. 



Figure a. San Pedro. — North end of Deadman Island, looking east, showing unconformity between 

 Pliocene and lower San Pedro (Pleistocene) strata. (See Diagram B, Plate XXII, for explanation.) 



Photograph by R. Arnold. 



Figure b. San Pedro,— East point of Deadman Island, looking north, showing unconrormity between 

 Pliocene and lower San Pedro (Pleistocene) strata. 



Photograph by R. Arnold. 



