﻿114 
  C. 
  L. 
  Baker 
  — 
  Contributions 
  to 
  the 
  

  

  Strata 
  subdivided 
  as 
  follows: 
  

  

  a. 
  Sandy 
  limestone 
  . 
  5' 
  

  

  b. 
  Shaly 
  sandstone 
  80' 
  

  

  c. 
  Sandy 
  limestone 
  5' 
  

  

  d. 
  Shaly 
  sandstone, 
  at 
  a 
  few 
  places 
  argilla- 
  

   ceous 
  and 
  carbonaceous, 
  in 
  beds 
  from 
  

  

  one 
  to 
  three 
  feet 
  thick 
  200' 
  

  

  e. 
  Smooth 
  shaly 
  to 
  massive 
  arenaceous 
  lime- 
  

   stone 
  20' 
  

  

  f 
  . 
  Shaly 
  sandstone 
  25' 
  

  

  g. 
  Limestone, 
  cherty, 
  f 
  ossilif 
  erous 
  20' 
  

  

  h. 
  Shaly 
  sandstone 
  somewhat 
  calcareous 
  

  

  towards 
  top 
  200' 
  

  

  Followed 
  one 
  mile 
  to 
  the 
  northwest, 
  300 
  feet 
  of 
  the 
  

   lower 
  strata 
  of 
  members 
  5, 
  6, 
  and 
  7 
  are 
  found 
  lacking 
  

   through 
  non-deposition, 
  and 
  member 
  4 
  has 
  increased 
  in 
  

   thickness 
  to 
  200 
  feet. 
  In 
  a 
  distance 
  of 
  one 
  fourth 
  of 
  a 
  

   mile 
  farther 
  north-northwest, 
  another 
  100 
  feet 
  of 
  member 
  

   7 
  has 
  disappeared. 
  

  

  The 
  contact 
  between 
  members 
  4 
  and 
  5 
  is 
  marked 
  by 
  

   irregular 
  depressions 
  in 
  the 
  underlying 
  limestone 
  filled 
  

   with 
  sandstone, 
  blocks 
  of 
  the 
  underlying 
  limestone 
  being 
  

   included 
  in 
  the 
  sandstone. 
  The 
  unconformity 
  and 
  basal 
  

   conglomerate 
  were 
  traced 
  southward 
  beyond 
  Guadalupe 
  

   Point. 
  

  

  Members 
  5, 
  6, 
  and 
  7 
  are 
  the 
  Delaware 
  Mountain 
  forma- 
  

   tion, 
  overlain 
  here 
  by 
  more 
  than 
  a 
  thousand 
  feet 
  of 
  mas- 
  

   sive 
  white 
  Capitan 
  limestone. 
  The 
  Delaware 
  Mountain 
  

   formation 
  gradually 
  thins 
  out 
  to 
  the 
  north 
  and 
  entirely 
  

   disappears 
  from 
  the 
  section 
  where 
  the 
  next 
  exposure 
  of 
  

   the 
  lower 
  rocks 
  is 
  seen, 
  near 
  El 
  Paso 
  Gap 
  in 
  the 
  Guada- 
  

   lupe 
  Mountains 
  of 
  New 
  Mexico. 
  Here 
  the 
  lower 
  San 
  

   Andreas 
  limestone 
  is 
  directly 
  overlain 
  by 
  the 
  Capitan 
  

   limestone. 
  The 
  Delaware 
  Mountain 
  formation 
  wedges 
  

   out 
  both 
  above 
  and 
  below 
  north 
  of 
  Bone 
  Springs, 
  the 
  

   upper 
  beds 
  passing 
  to 
  the 
  north 
  into 
  limestone 
  only 
  a 
  

   little 
  less 
  massive 
  than 
  the 
  overlying 
  Capitan. 
  

  

  Capitan 
  Limestone. 
  — 
  The 
  Capitan 
  limestone 
  is 
  more 
  

   than 
  2000 
  feet 
  thick 
  in 
  the 
  eastern 
  Guadalupe 
  Mountains. 
  

   The 
  limestone 
  is 
  in 
  large 
  part 
  dolomitic 
  and 
  exhibits 
  

   many 
  secondary 
  structures, 
  such 
  as 
  pisolites, 
  stalactites, 
  

   wavy-bedded 
  travertines 
  and 
  cave-fillings. 
  Locally 
  it 
  is 
  

   uniform-bedded, 
  but 
  passes 
  along 
  the 
  strike 
  into 
  massive 
  

   rock 
  without 
  bedding 
  planes. 
  The 
  prevailing 
  color 
  is 
  

  

  