MemdirsCal Acad. Sci.Vdl. III. 



[arndld] PiATE mi 



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

 (Pleistocene) strata. Photograph by R. Arnold. 



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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. 



