﻿86 
  SANTA 
  MAKIA 
  OIL 
  DISTRICT, 
  CALIFORNIA. 
  

  

  CONCLUSIONS 
  REGARDING 
  FUTURE 
  DEVELOPMENT. 
  

  

  The 
  Purisima 
  Hills 
  anticlinal 
  fold 
  seems 
  to 
  offer 
  a 
  favorable 
  loca- 
  

   tion 
  for 
  oil 
  wells 
  along 
  most 
  of 
  its 
  south 
  flank. 
  Owing 
  to 
  the 
  plung- 
  

   ing 
  of 
  the 
  fold 
  toward 
  its 
  middle, 
  lower 
  and 
  lower 
  strata 
  are 
  reached 
  

   as 
  its 
  extremities 
  are 
  approached. 
  In 
  the 
  region 
  mapped 
  as 
  Fer- 
  

   nando, 
  between 
  the 
  Hill 
  wells 
  and 
  the 
  head 
  of 
  Canada 
  Laguna 
  Seca, 
  

   the 
  summit 
  beds 
  of 
  the 
  Monterey 
  are 
  overlain 
  by 
  later 
  sand 
  and 
  a 
  

   well 
  would 
  have 
  to 
  be 
  drilled 
  to 
  a 
  great 
  depth 
  before 
  reaching 
  the 
  

   oil 
  horizon. 
  East 
  and 
  west 
  of 
  that 
  region 
  the 
  oil 
  horizon 
  probably 
  

   approaches 
  nearer 
  to 
  the 
  surface. 
  In 
  the 
  vicinity 
  of 
  Redrock 
  Moun- 
  

   tain, 
  especially 
  to 
  the 
  west 
  of 
  it, 
  the 
  conditions 
  seem 
  very 
  favorable 
  

   for 
  the 
  occurrence 
  of 
  oil. 
  Farther 
  east, 
  near 
  La 
  Zaca 
  Creek, 
  a 
  much 
  

   lower 
  portion 
  of 
  the 
  Monterey 
  is 
  exposed 
  and 
  the 
  rocks 
  have 
  been 
  

   affected 
  by 
  considerable 
  disturbance, 
  so 
  that 
  it 
  is 
  less 
  likely 
  that 
  large 
  

   accumulations 
  of 
  oil 
  will 
  be 
  found 
  there. 
  

  

  AREA 
  AROUND 
  SANTA 
  YNEZ. 
  

  

  The 
  Santa 
  Ynez 
  anticline 
  is 
  a 
  distinct 
  steep 
  fold 
  exposed 
  southeast 
  

   of 
  the 
  town 
  of 
  that 
  name. 
  It 
  supports 
  on 
  its 
  flanks 
  a 
  thickness 
  of 
  

   at 
  least 
  2,500 
  feet 
  of 
  calcareous 
  and 
  porcelaneous 
  shales 
  belonging 
  to 
  

   the 
  lower 
  portion 
  of 
  the 
  Monterey. 
  The 
  dips 
  at 
  the 
  axis 
  range 
  

   between 
  50° 
  and 
  80°, 
  but 
  become 
  lower 
  toward 
  either 
  side. 
  This 
  

   fold 
  is 
  seemingly 
  a 
  structural 
  continuation 
  of 
  that 
  of 
  the 
  Purisima 
  

   Hills, 
  and 
  it 
  probably 
  extends 
  under 
  the 
  gravels 
  of 
  the 
  region 
  around 
  

   Santa 
  Ynez, 
  its 
  axis 
  passing 
  approximately 
  under 
  that 
  town. 
  But 
  

   it 
  is 
  doubtful 
  whether 
  it 
  is 
  actually 
  the 
  same 
  as 
  either 
  of 
  the 
  anti- 
  

   clines 
  that 
  are 
  shown 
  on 
  the 
  map 
  as 
  stopping 
  indefinitely 
  near 
  the 
  

   east 
  end 
  of 
  the 
  Purisima 
  Hills. 
  The 
  terraced 
  stretch 
  between 
  La 
  

   Zaca 
  Creek 
  and 
  Ballard 
  seems 
  from 
  the 
  fragmentary 
  evidence 
  obtain- 
  

   able 
  to 
  be 
  in 
  a 
  way 
  an 
  undulating 
  structural 
  plateau 
  formed 
  of 
  beds 
  

   low 
  in 
  the 
  oil-bearing 
  shale, 
  dipping 
  at 
  slight 
  angles 
  in 
  various 
  direc- 
  

   tions. 
  It 
  is 
  probable 
  that 
  the 
  structure 
  of 
  the 
  Purisima 
  Hills 
  is 
  

   here 
  interrupted, 
  but 
  continued 
  in 
  a 
  general 
  way 
  beyond 
  by 
  the 
  

   Santa 
  Ynez 
  anticline. 
  Owing 
  to 
  the 
  low 
  position 
  of 
  the 
  beds 
  in 
  the 
  

   formation, 
  the 
  chances 
  for 
  finding 
  a 
  consklerable 
  amount 
  of 
  oil 
  along 
  

   this 
  anticline 
  do 
  not 
  seem 
  to 
  be 
  as 
  good 
  as 
  farther 
  west. 
  No 
  sur- 
  

   face 
  evidence 
  of 
  petroleum 
  was 
  seen. 
  Any 
  definite 
  statements, 
  

   however, 
  in 
  regard 
  to 
  the 
  region 
  between 
  Los 
  Olivos 
  and 
  Santa 
  

   Ynez 
  River 
  and 
  between 
  La 
  Zaca 
  Creek 
  and 
  the 
  east 
  edge 
  of 
  the 
  area 
  

   mapped 
  are 
  hazardous, 
  for 
  the 
  reason 
  that 
  the 
  widespread 
  terrace 
  

   deposits 
  obscure 
  practically 
  all 
  of 
  the 
  structure. 
  

  

  