﻿138 
  8. 
  Powers— 
  The 
  Butler 
  Salt 
  Dome. 
  

  

  bedded 
  sandstones 
  appear 
  to 
  be 
  either 
  horizontal 
  or 
  to 
  

   dip 
  slightly 
  toward 
  the 
  dome. 
  On 
  the 
  west 
  side 
  of 
  the 
  

   Steen 
  salt 
  dome 
  hills 
  above 
  the 
  central 
  lake 
  are 
  similarly 
  

   capped 
  by 
  almost 
  horizontal 
  ferruginous 
  sandstone 
  sug- 
  

   gesting 
  an 
  unconformity. 
  These 
  observations 
  tend 
  to 
  

   confirm 
  the 
  belief 
  of 
  Deussen 
  (cited 
  by 
  Hopkins) 
  that 
  the 
  

   interior 
  domes 
  were 
  uplifted 
  in 
  late 
  Wilcox 
  time. 
  

  

  The 
  amount 
  of 
  uplift 
  in 
  the 
  center 
  of 
  the 
  dome 
  is 
  esti- 
  

   mated 
  from 
  a 
  comparison 
  of 
  well 
  logs 
  as 
  approximately 
  

   3000 
  feet, 
  but 
  when 
  estimated 
  from 
  Hopkins' 
  section 
  it 
  

   appears 
  to 
  be 
  only 
  about 
  1200 
  feet. 
  The 
  amount 
  of 
  

   uplift 
  in 
  the 
  Keechi 
  and 
  Palestine 
  domes, 
  according 
  to 
  

   Hopkins' 
  figures, 
  is 
  2000-2500 
  feet 
  and 
  3000 
  feet, 
  respec- 
  

   tively. 
  That 
  in 
  the 
  Brooks, 
  Steen, 
  and 
  Grand 
  Saline 
  

   domes, 
  using 
  the 
  figures 
  of 
  Hopkins' 
  stratigraphic 
  sec- 
  

   tion, 
  is 
  3000, 
  900, 
  and 
  400 
  feet, 
  respectively. 
  

  

  The 
  presence 
  of 
  oil-bearing 
  sands 
  at 
  about 
  the 
  horizon 
  

   of 
  the 
  Woodbine 
  is 
  questionable 
  as 
  no 
  sands 
  appear 
  to 
  

   have 
  been 
  found 
  in 
  deep 
  tests 
  in 
  the 
  region 
  except 
  for 
  

   the 
  showing 
  of 
  oil 
  in 
  one 
  of 
  the 
  wells 
  on 
  the 
  Keechi 
  dome. 
  

   The 
  Woodbine 
  formation 
  thins 
  rapidly 
  to 
  the 
  south 
  and 
  

   seems 
  to 
  disappear 
  on 
  the 
  outcrop 
  at 
  the 
  Brazos 
  Eiver. 
  7 
  

   The 
  age 
  of 
  the 
  lower 
  gas 
  rock 
  (Blossom 
  sand) 
  in 
  North 
  

   Louisiana 
  is 
  Eagle 
  Ford 
  and 
  the 
  age 
  of 
  the 
  Woodbine 
  

   sands 
  is 
  placed 
  near 
  the 
  base 
  of 
  the 
  Eagle 
  Ford 
  on 
  

   evidence 
  secured 
  from 
  fossils 
  identified 
  by 
  Dr. 
  L. 
  W. 
  

   Stephenson, 
  8 
  but 
  the 
  rapid 
  thinning 
  of 
  the 
  Woodbine 
  

   formation 
  to 
  the 
  south 
  suggests 
  that 
  a 
  similar 
  thinning 
  

   and 
  disappearance 
  of 
  sandy 
  conditions 
  probably 
  takes 
  

   place 
  in 
  the 
  Eagle 
  Ford. 
  

  

  Other 
  horizons 
  from 
  which 
  petroleum 
  is 
  produced, 
  ex- 
  

   cluding 
  the 
  higher 
  portion 
  of 
  the 
  Sabine 
  uplift, 
  are 
  the 
  

   Navarro 
  formation 
  probably 
  producing 
  some 
  oil 
  in 
  the 
  

   Tracy 
  field, 
  Milam 
  County, 
  Texas 
  ; 
  the 
  Nacatoch 
  sand, 
  

   producing 
  oil 
  on 
  the 
  sides 
  of 
  the 
  uplift 
  in 
  Shelby 
  County, 
  

   Texas, 
  and 
  at 
  Homer, 
  Louisiana, 
  and 
  producing 
  gas 
  at 
  

   Mexia, 
  Texas, 
  and 
  Monroe, 
  Louisiana; 
  the 
  Taylor 
  marl 
  

   producing 
  oil 
  at 
  Corsicana 
  and 
  at 
  Somerset, 
  Texas 
  ; 
  the 
  

  

  7 
  J. 
  A. 
  Udden 
  et 
  al., 
  Review 
  of 
  the 
  geology 
  of 
  Texas, 
  Univ. 
  of 
  Texas 
  Bull. 
  

   44, 
  3d 
  ed., 
  pp. 
  78-9, 
  1919. 
  

  

  8 
  G. 
  C. 
  Matson 
  and 
  O. 
  B. 
  Hopkins, 
  The 
  DeSoto-Red 
  River 
  oil 
  and 
  gas 
  

   field, 
  Louisiana, 
  U. 
  S. 
  Geol. 
  Surv., 
  Bull. 
  661, 
  p. 
  115; 
  Mowry 
  Bates, 
  A 
  Con- 
  

   crete 
  example 
  of 
  the 
  use 
  of 
  well 
  logs, 
  Amer. 
  Inst. 
  Min. 
  Engrs., 
  Bull. 
  137, 
  

   p. 
  980, 
  1918. 
  

  

  