Memoirs Cal Acad. Sci.Vdl. Ill 



[Arnpud] Plate •CC} 



jb^. 





Figure a. Long Beach. — Bluff at Alamitos Beach, looking east, showing horizontal upper San Pedro 

 (Pleistocene) strata. Photograph by R. Arnold. 



^^rrrtp 



S.2^ 



f^': 



_»r2izi-", 



msi 



1^ ■*■• 



t 



idin^mgl 



Figure b. Long Beach.— Typical section of the upper San Pedro (Pleistocene) bluff east of Long 

 Beach. (Lowest visible layer composed of fossil shells). Photograph by R. Arnold. 



