﻿58 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  faulted 
  and 
  folded 
  the 
  Cretaceous 
  strata, 
  throwing 
  up 
  mountain 
  

   chains 
  of 
  vast 
  extent, 
  and 
  raising 
  them 
  far 
  above 
  the 
  waters 
  of 
  

   the 
  gulf. 
  " 
  "If 
  we 
  could 
  remove 
  the 
  covering 
  mantle 
  of 
  Tertiary 
  

   and 
  drift, 
  we 
  would 
  yet 
  see 
  the 
  chains 
  and 
  peaks 
  of 
  limestone 
  

   ranges 
  formed 
  at 
  the 
  close 
  of 
  the 
  middle 
  age 
  of 
  our 
  planet, 
  

   altered 
  somewhat 
  by 
  later 
  erosion 
  and 
  denudation. 
  ' 
  ' 
  He 
  believes 
  

   there 
  was 
  no 
  interval 
  of 
  a 
  land 
  period 
  between 
  the 
  Cretaceous 
  

   and 
  Eocene 
  in 
  this 
  State. 
  

  

  Vaughan 
  * 
  argues 
  that 
  there 
  was 
  a 
  time 
  interval 
  between 
  the 
  

   close 
  of 
  the 
  Cretaceous 
  and 
  the 
  beginning 
  of 
  the 
  Eocene, 
  and 
  

   adds 
  : 
  " 
  Furthermore, 
  the 
  Cretaceous 
  at 
  the 
  Winn 
  parish 
  marble 
  

   quarry 
  is 
  almost 
  horizontal, 
  the 
  limestone 
  rising 
  as 
  a 
  butte-like 
  

   mass 
  into 
  the 
  Eocene. 
  If 
  there 
  had 
  been 
  a 
  mountain 
  chain, 
  as 
  

   Dr. 
  lycrch 
  maintains, 
  with 
  the 
  Eocene 
  deposited 
  immediately 
  

   thereafter, 
  before 
  erosion 
  had 
  degraded 
  the 
  limestone, 
  the 
  Cre- 
  

   taceous 
  rock 
  at 
  the 
  place 
  under 
  discussion 
  should 
  represent 
  either 
  

   a 
  dome 
  or 
  anticline, 
  but 
  such 
  is 
  not 
  the 
  case. 
  In 
  the 
  mind 
  of 
  

   the 
  author 
  the 
  most 
  logical 
  explanation 
  of 
  the 
  relation 
  of 
  the 
  

   Cretaceous 
  to 
  the 
  Eocene 
  is 
  that 
  a 
  land 
  period 
  followed 
  the 
  close 
  

   of 
  the 
  deposition 
  of 
  the 
  rocks 
  belonging 
  to 
  the 
  former 
  series." 
  

  

  Vaughan 
  is 
  doubtless 
  right 
  so 
  far 
  as 
  his 
  last 
  statement 
  is 
  con- 
  

   cerned. 
  Nowhere 
  along 
  the 
  Atlantic 
  or 
  Gulf 
  slope 
  are 
  we 
  aware 
  

   that 
  the 
  Eocene 
  follows 
  the 
  Cretaceous 
  without 
  a 
  marked 
  strati- 
  

   graphic 
  break. 
  But 
  he 
  is 
  wrong 
  in 
  saying 
  that 
  domes 
  and 
  

   anticlines 
  are 
  not 
  here 
  represented. 
  In 
  fact 
  both 
  are 
  splendidly 
  

   exhibited. 
  Nothing 
  could 
  be 
  more 
  apparent 
  than 
  the 
  dome-like 
  

   structure 
  of 
  the 
  easternmost 
  bluff 
  whose 
  western 
  end 
  shows 
  a 
  

   northern 
  dip, 
  which 
  but 
  a 
  few 
  yards 
  eastward 
  swings 
  around 
  

   eastward 
  and 
  finally 
  becomes 
  due 
  east. 
  To 
  be 
  sure 
  it 
  is 
  only 
  the 
  

   N. 
  E. 
  ji 
  of 
  the 
  dome 
  that 
  is 
  represented 
  by 
  this 
  bluff. 
  

  

  In 
  some 
  instances 
  the 
  rocks 
  are 
  so 
  faulted, 
  fractured 
  and 
  

   fissured 
  that 
  no 
  general 
  dips 
  can 
  be 
  ascertained 
  ; 
  but 
  we 
  are 
  

   strongly 
  inclined 
  to 
  believe 
  the 
  huge 
  masses 
  of 
  Lower 
  Claiborne 
  

   limestone 
  indicated 
  to 
  the 
  north 
  — 
  northwest 
  of 
  the 
  Cretaceous 
  

   escarpments 
  are 
  quite 
  highly 
  inclined 
  to 
  the 
  north. 
  It 
  then 
  

   follows 
  that 
  the 
  time 
  of 
  upheavel 
  of 
  these 
  limestone 
  deposits 
  

   was 
  since 
  the 
  Lower 
  Claiborne 
  time. 
  

  

  * 
  Amer. 
  Geol. 
  Vol. 
  15, 
  p. 
  208, 
  1895. 
  

  

  