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  SANTA 
  M 
  AIM 
  A 
  OIL 
  DISTRICT, 
  CALIFORNIA. 
  

  

  

  The 
  Casmalia 
  Hills 
  include 
  the 
  group 
  extending 
  from 
  the 
  coast 
  at 
  

   Point 
  Sal 
  to 
  Graciosa 
  and 
  Harris 
  canyons 
  and 
  San 
  Antonio 
  Valley. 
  

  

  The 
  Solomon 
  Hills 
  lie 
  between 
  the 
  Santa 
  Maria 
  Valley, 
  Foxen 
  

   Canyon, 
  and 
  the 
  Los 
  Alamos 
  Valley, 
  and 
  between 
  Divide 
  and 
  La 
  

   Zaca 
  ('reek. 
  

  

  The 
  Purisima 
  Hills 
  lie 
  between 
  Lompoc, 
  the 
  Santa 
  Rita 
  Valley, 
  and 
  

   the 
  Santa 
  Ynez 
  Valley 
  on 
  the 
  south 
  and 
  the 
  Los 
  Alamos 
  Valley 
  on 
  

   the 
  north, 
  and 
  between 
  Burton 
  Mesa 
  on 
  the 
  west 
  and 
  Alamo 
  Pintado 
  

   Creek 
  on 
  the 
  easl 
  . 
  

  

  The 
  Santa 
  Rita 
  Hills 
  lie 
  between 
  the 
  Santa 
  Ynez 
  and 
  Santa 
  Rita 
  

   valleys, 
  extending 
  from 
  a 
  point 
  east 
  of 
  Lompoc 
  nearly 
  to 
  the 
  east 
  

   edge 
  of 
  the 
  Santa 
  Rosa 
  grant. 
  

  

  The 
  name 
  San 
  Antonio 
  terrace 
  1 
  is 
  applied 
  to 
  the 
  wide 
  terraced 
  region 
  

   between 
  Casmalia 
  and 
  the 
  west 
  end 
  of 
  the 
  Los 
  Alamos 
  Valley. 
  

  

  The 
  Lompoc 
  terrace 
  is 
  the 
  plateau-like 
  region 
  of 
  hills 
  extending 
  

   from 
  the 
  coast 
  a 
  distance 
  of 
  about 
  5 
  miles 
  east 
  from 
  Honda 
  and 
  the 
  

   same 
  distance 
  southeast 
  from 
  Surf. 
  

  

  In 
  1896 
  H. 
  W. 
  Fairbanks 
  used 
  the 
  names 
  "Point 
  Sal 
  Ridge" 
  for 
  

   the 
  axis 
  of 
  the 
  hills 
  between 
  Mount 
  Lospe 
  and 
  Point 
  Sal, 
  and 
  " 
  Lions 
  

   Head" 
  for 
  a 
  high, 
  rugged 
  mass 
  of 
  serpentine 
  on 
  the 
  coast 
  south 
  of 
  

   Point 
  Sal. 
  These 
  features 
  are 
  so 
  named 
  here. 
  

  

  RELIEF. 
  

   GENERAL 
  STATEMENT. 
  

  

  The 
  general 
  character 
  of 
  the 
  region 
  covered 
  by 
  the 
  Lompoc 
  and 
  

   Guadalupe 
  quadrangles 
  is 
  that 
  of 
  a 
  triangular 
  hilly 
  basin 
  opening 
  

   out 
  toward 
  the 
  coast 
  between 
  two 
  divergent 
  ranges 
  of 
  mountains 
  — 
  the 
  

   San 
  Rafael 
  Range 
  in 
  the 
  northeast 
  portion 
  of 
  the 
  area 
  and 
  the 
  Santa 
  

   Ynez 
  Range 
  bordering 
  it 
  on 
  the 
  south. 
  At 
  the 
  east 
  edge 
  of 
  the 
  area 
  

   mapped 
  these 
  ranges 
  are 
  divided 
  only 
  by 
  the 
  valley 
  of 
  Santa 
  Ynez 
  

   River 
  and 
  the 
  foothills 
  north 
  of 
  it. 
  Farther 
  west 
  the 
  distance 
  between 
  

   them 
  grows 
  to 
  30 
  miles 
  or 
  more. 
  The 
  region 
  situated 
  in 
  this 
  angle 
  is 
  

   primarily 
  a 
  basin, 
  owing 
  its 
  character 
  and 
  the 
  details 
  of 
  its 
  structure 
  

   to 
  its 
  position 
  between 
  these 
  ranges. 
  This 
  basin 
  region, 
  its 
  struc- 
  

   ture, 
  and 
  its 
  oil 
  deposits 
  form 
  the 
  principal 
  subjects 
  of 
  discussion 
  in 
  

   the 
  present 
  paper. 
  

  

  Two 
  lines 
  of 
  hills 
  and 
  three 
  valleys 
  occupy 
  this 
  trough 
  between 
  the 
  

   two 
  main 
  ranges, 
  radiating 
  like 
  the 
  intermediate 
  ribs 
  of 
  a 
  fan 
  between 
  

   the 
  lines 
  that 
  bound 
  them. 
  The 
  more 
  northerly 
  of 
  the 
  two 
  lines 
  of 
  

   hills 
  La 
  that 
  of 
  the 
  Solomon 
  and 
  Casmalia 
  hills, 
  which 
  are 
  separated 
  

   from 
  the 
  San 
  Rafael 
  Mountains 
  by 
  the 
  wide 
  valley 
  of 
  Santa 
  Maria 
  

   River. 
  The 
  more 
  southerly 
  is 
  the 
  range 
  of 
  the 
  Purisima 
  Hills, 
  which 
  

   is 
  separated 
  from 
  the 
  Santa 
  Ynez 
  Mountains 
  by 
  Santa 
  Ynez 
  River. 
  

   These 
  two 
  lines 
  of 
  hills 
  are 
  themselves 
  divided 
  by 
  Los 
  Alamos 
  Valley. 
  

  

  