﻿U. 
  S. 
  GEOLOGICAL 
  SURVEY 
  

  

  BULLETIN 
  NO. 
  322 
  PL. 
  VIII 
  

  

  A. 
  ALCATRAZ 
  ASPHALT 
  MINE, 
  3 
  MILES 
  EAST 
  OF 
  SISQUOC. 
  

   Showing 
  the 
  horizontal 
  Fernando 
  brea 
  deposits 
  overlying 
  the 
  steeply 
  tilted 
  Monterey 
  shale. 
  

  

  B. 
  UNCONFORMITY 
  BETWEEN 
  TILTED 
  MONTEREY 
  SHALE 
  AND 
  HORIZONTAL 
  PLEISTOCENE 
  

  

  SAND 
  AND 
  GRAVEL. 
  

  

  In 
  railroad 
  cut 
  northeast 
  of 
  Casmalia. 
  Photograph 
  by 
  Ralph 
  Arnold. 
  

  

  