﻿&2 
  santa 
  MABIA 
  OIL 
  DISTRICT, 
  CALIFORNIA. 
  

  

  to 
  aii 
  anticlinal 
  axis 
  and 
  is 
  the 
  line 
  mapped. 
  In 
  places 
  it 
  is 
  a 
  true 
  

   anticline, 
  completed 
  *by 
  beds 
  of 
  gentle 
  dip 
  that 
  form 
  a 
  broad 
  svn- 
  

   cline 
  of 
  the 
  platform 
  on 
  its 
  southwest 
  side. 
  South 
  of 
  Corralillos 
  

  

  (reek 
  the 
  struct 
  nre 
  curves 
  westward 
  and 
  the 
  Schumann 
  anticline 
  is 
  

   sharply 
  denned 
  and 
  overturned. 
  ]t 
  is 
  seemingly 
  to 
  be 
  correlated 
  

   with 
  a 
  Large 
  anticline 
  exposed 
  in 
  the 
  Tejon-Vaqueros 
  rocks 
  on 
  the 
  

   coast 
  north 
  of 
  Point 
  Sal. 
  South 
  of 
  Waldorf 
  this 
  anticline, 
  as 
  shown 
  

   by 
  the 
  dotted 
  line 
  on 
  the 
  map, 
  is 
  not 
  certainly 
  continuous, 
  hut 
  west 
  

   and 
  south 
  of 
  Schumann 
  the 
  same 
  or 
  a 
  similar 
  fold 
  becomes 
  well 
  

   developed 
  and 
  the 
  strata 
  dip 
  away 
  from 
  it 
  on 
  both 
  sides. 
  In 
  this 
  

   portion 
  and 
  southeast 
  of 
  Schumann 
  Canyon 
  its 
  summit 
  is 
  broad, 
  

   hut 
  the 
  dips 
  become 
  very 
  steep 
  farther 
  out 
  on 
  its 
  northeastern 
  

   flank. 
  It 
  plunges 
  to 
  the 
  southeast 
  and 
  finally 
  dies 
  out. 
  

  

  Asphalt 
  and 
  other 
  surface 
  indications 
  of 
  oil, 
  such 
  as 
  burnt 
  shale 
  

   and 
  bituminous 
  shale, 
  occur 
  at 
  many 
  places 
  in 
  the 
  Casmalia 
  Hills. 
  

   The 
  shale 
  is 
  especially 
  bituminous 
  along 
  and 
  near 
  its 
  contact 
  

   with 
  the 
  Fernando 
  on 
  the 
  northeastern 
  side 
  of 
  that 
  part 
  of 
  the 
  hills 
  

   which 
  lies 
  north 
  of 
  Schumann, 
  and 
  it 
  has 
  been 
  burnt 
  in 
  a 
  number 
  of 
  

   places 
  in 
  the 
  same 
  region. 
  Outcrops 
  of 
  burnt 
  shale 
  are 
  prominent 
  

   on 
  the 
  hill 
  just 
  southeast 
  of 
  Schumann, 
  and 
  near 
  the 
  contact 
  at 
  the 
  

   northern 
  base 
  of 
  this 
  hill 
  the 
  shale 
  is 
  extremely 
  bituminous. 
  Wells 
  

   put 
  down 
  in 
  the 
  region 
  about 
  Schumann 
  encounter 
  heavy 
  tar 
  at 
  

   depths 
  below 
  2,000 
  feet, 
  but 
  no 
  paying 
  wells 
  have 
  been 
  struck. 
  It 
  

   seems 
  likely, 
  however, 
  that 
  at 
  greater 
  depths, 
  possibly 
  3,000 
  feet 
  or 
  

   so, 
  the 
  horizon 
  of 
  the 
  productive 
  flinty 
  beds 
  encountered 
  in 
  the 
  

   Graciosa 
  Ridge 
  wells 
  will 
  be 
  penetrated 
  and 
  will 
  yield 
  lighter 
  oil 
  in 
  

   paying 
  quantities. 
  

  

  The 
  region 
  lying 
  north 
  of 
  Schumann 
  Canyon, 
  west 
  of 
  the 
  valley 
  

   that 
  runs 
  southward 
  out 
  of 
  the 
  hills 
  and 
  opens 
  to 
  Schumann 
  Canyon 
  

   1 
  mile 
  X. 
  45° 
  W. 
  of 
  the 
  Casmalia 
  depot, 
  and 
  west 
  of 
  the 
  road 
  that 
  

   crosses 
  the 
  ridge 
  to 
  Waldorf 
  will 
  probably 
  not 
  yield 
  any 
  large 
  quan- 
  

   tity 
  of 
  petroleum, 
  because 
  the 
  strata 
  are 
  so 
  low 
  in 
  the 
  formation 
  

   and 
  because 
  there 
  appear 
  to 
  be 
  no 
  sufficiently 
  well-developed 
  folds 
  

   to 
  afford 
  good 
  points 
  of 
  accumulation. 
  Oil 
  might 
  be 
  found 
  in 
  small 
  

   quantities 
  in 
  the 
  minor 
  folds 
  between 
  the 
  lower 
  portion 
  of 
  Schumann 
  

   Canyon 
  and 
  the 
  fault. 
  The 
  shale 
  along 
  the 
  coast 
  here 
  is 
  very 
  bitu- 
  

   minous. 
  East 
  and 
  south 
  of 
  the 
  supposedly 
  unproductive 
  region 
  

   outlined 
  above 
  the 
  plunging 
  structure 
  exposes 
  higher 
  portions 
  of 
  the 
  

   Monterey 
  shale 
  and 
  the 
  conditions 
  warrant 
  the 
  conclusion 
  that 
  oil 
  

   can 
  probably 
  be 
  obtained 
  in 
  the 
  neighborhood 
  of 
  the 
  major 
  anti- 
  

   cline. 
  Southeast 
  of 
  the 
  point 
  where 
  the 
  road 
  south 
  of 
  Waldorf 
  

   crosses 
  the 
  ridge 
  the 
  territory 
  appears 
  promising, 
  especially 
  along 
  

   the 
  anticline 
  and 
  on 
  its 
  east 
  side. 
  The 
  oil 
  which 
  is 
  supposed 
  to 
  rise 
  

   on 
  the 
  steep 
  eastern 
  flank 
  of 
  the 
  fold 
  probably 
  does 
  not 
  reach 
  far 
  

   under 
  the 
  broad 
  western 
  flank. 
  South 
  of 
  Schumann, 
  where 
  the 
  fold 
  

  

  