﻿4 
  CONTENTS. 
  

  

  Geology 
  * 
  kml 
  inued. 
  

  

  Sedimentary 
  formations 
  — 
  Continued. 
  

  

  Monterey 
  shale 
  (middle 
  Miocene) 
  Continued. 
  

  

  Structure 
  and 
  thickness 
  47 
  

  

  Evidence 
  of 
  age 
  17 
  

  

  Metamorphism 
  of 
  the 
  Bhale 
  by 
  combustion 
  48 
  

  

  Localities 
  where 
  the 
  shale 
  is 
  at 
  presenl 
  burning 
  18 
  

  

  Typical 
  occurrences 
  of 
  burnl 
  Bhale 
  l!» 
  

  

  Depth 
  i" 
  which 
  alteration 
  has 
  extended 
  49 
  

  

  Lithologic 
  character 
  of 
  burnt 
  shale 
  50 
  

  

  Cause 
  of 
  the 
  alteration 
  51 
  

  

  Range 
  in 
  time 
  of 
  the 
  phenomenon 
  52 
  

  

  Fernando 
  formation 
  (Miocene-Pliooenc-Pleistocene) 
  52 
  

  

  General 
  statement 
  52 
  

  

  Lit 
  hologic 
  character 
  54 
  

  

  Structure 
  56 
  

  

  Distribution 
  57 
  

  

  Evidence 
  of 
  age 
  57 
  

  

  Quaternary 
  GO 
  

  

  General 
  statement 
  60 
  

  

  Terrace 
  deposits 
  60 
  

  

  ( 
  reneral 
  description 
  60 
  

  

  Lithologic 
  character 
  61 
  

  

  Origin 
  63 
  

  

  Dune 
  sand 
  63 
  

  

  Alluvium 
  64 
  

  

  Igneous 
  rocks 
  (54 
  

  

  General 
  statement 
  64 
  

  

  Igneous 
  rocks 
  of 
  pre-Monterey 
  age 
  64 
  

  

  Igneous 
  rocks 
  intruding 
  the 
  Monterey 
  65 
  

  

  Geologic 
  history 
  66 
  

  

  Earliest 
  periods 
  66 
  

  

  Eocene 
  period 
  66 
  

  

  Lower 
  Miocene 
  period 
  67 
  

  

  Middle 
  Miocene 
  period 
  67 
  

  

  Late 
  Tertiary 
  and 
  early 
  Quaternary 
  period 
  69 
  

  

  Main 
  Quaternary 
  period 
  70 
  

  

  Structure 
  and 
  conditions 
  affecting 
  the 
  presence 
  of 
  oil 
  71 
  

  

  The 
  anticlinal 
  theory 
  71 
  

  

  Accumulation 
  of 
  oil 
  in 
  the 
  Santa 
  Maria 
  district 
  * 
  72 
  

  

  Indicat 
  ions 
  of 
  oil 
  74 
  

  

  General 
  structural 
  considerations 
  75 
  

  

  Detailed 
  discussion 
  of 
  structure 
  75 
  

  

  Region 
  of 
  the 
  San 
  Rafael 
  Mountains 
  76 
  

  

  Areas 
  of 
  rocks 
  older 
  than 
  the 
  Monterey 
  76 
  

  

  Areas 
  of 
  Monterey 
  and 
  later 
  formations 
  76 
  

  

  Folds 
  76 
  

  

  Faults 
  77 
  

  

  Evidences 
  of 
  pet 
  roleum 
  78 
  

  

  Conclusions 
  regarding 
  future 
  development 
  79 
  

  

  Region 
  of 
  Santa 
  Ynez 
  Mountains 
  80 
  

  

  Area 
  south 
  of 
  Lompoc 
  80 
  

  

  Area 
  of 
  Santa 
  Rita 
  Hills 
  80 
  

  

  Main 
  portion 
  of 
  the 
  Santa 
  Ynez 
  Range 
  81 
  

  

  