﻿nij 
  The 
  Five 
  Islands 
  : 
  Cote 
  Blanche 
  229 
  

  

  was 
  in 
  the 
  form 
  of 
  a 
  distinct 
  anticline 
  and 
  although 
  the 
  shaft 
  has 
  

   not 
  followed 
  the 
  dome 
  of 
  the 
  anticline 
  exactly, 
  it 
  being 
  now 
  on 
  

   one 
  side 
  of 
  the 
  shaft 
  and 
  now 
  on 
  the 
  other, 
  its 
  presence 
  was 
  

   always 
  clearly 
  indicated. 
  A 
  cross-section 
  of 
  the 
  island 
  from 
  

   A-B, 
  Plate 
  21, 
  made 
  by 
  connecting 
  the 
  data 
  furnished 
  by 
  the 
  

   shaft, 
  the 
  different 
  wells 
  along 
  the 
  line 
  of 
  the 
  section, 
  and 
  the 
  

   surface 
  outcrops 
  show 
  a 
  very 
  distinct 
  anticline, 
  or 
  better, 
  

   elongated 
  dome 
  (Fig. 
  6). 
  It 
  is 
  interesting 
  to 
  note 
  the 
  similarity 
  

   of 
  the 
  dip 
  of 
  the 
  shell 
  layer 
  and 
  that 
  of 
  the 
  salt. 
  This 
  would 
  

   seem 
  to 
  fix 
  the 
  time 
  of 
  uplift. 
  The 
  shells 
  are 
  all 
  species 
  now 
  

   living 
  in 
  the 
  Gulf. 
  They 
  may 
  be 
  regarded 
  as 
  representing 
  the 
  

   marine 
  facies 
  of 
  the 
  Port 
  Hudson 
  of 
  Hilgard. 
  This 
  would 
  

   indicate 
  that 
  in 
  very 
  recent 
  time 
  the 
  Gulf 
  coast 
  has 
  been 
  the 
  

   scene 
  of 
  crustal 
  movements. 
  

  

  Archeology 
  

  

  Shell 
  heap. 
  — 
  Excavations 
  for 
  a 
  canal 
  near 
  the 
  shaft 
  on 
  the 
  

   northeastern 
  corner 
  of 
  the 
  island, 
  have 
  revealed 
  just 
  in 
  the 
  edge 
  

   of 
  the 
  present 
  sea-marsh 
  and 
  covered 
  by 
  from 
  one 
  to 
  three 
  feet 
  

   of 
  its 
  deposits 
  a 
  kitchen-midden 
  or 
  kitchen 
  refuse 
  heap 
  composed 
  

   of 
  shells 
  of 
  Gnathodon 
  cuneatus, 
  Ostrea 
  virginica, 
  an 
  occasional 
  

   representative 
  of 
  the 
  Unionidce 
  and 
  vertebrate 
  remains. 
  As 
  

   exposed 
  along 
  the 
  side 
  of 
  the 
  canal 
  the 
  heap 
  is 
  150 
  to 
  200 
  feet 
  

   long 
  and 
  three 
  feet 
  thick. 
  A 
  human 
  skeleton 
  was 
  taken 
  out 
  

   near 
  the 
  northern 
  end. 
  

  

  The 
  most 
  interesting 
  feature 
  of 
  the 
  shell 
  heap 
  are 
  the 
  numer- 
  

   ous 
  little 
  baked 
  clay 
  objects 
  found 
  scattered 
  through 
  it. 
  Frag- 
  

   ments 
  of 
  pottery 
  are 
  relatively 
  scarce. 
  These 
  little 
  objects 
  

   average 
  about 
  two 
  inches 
  in 
  diameter. 
  A 
  common 
  form 
  has 
  the 
  

   shape 
  of 
  two 
  cones 
  placed 
  base 
  to 
  base. 
  This 
  pattern 
  is 
  varied 
  

   by 
  making 
  four 
  indentations 
  around 
  its 
  equator. 
  Others 
  are 
  

   irregular 
  spheres 
  with 
  four 
  elongated 
  indentations 
  about 
  them 
  

   mediallj'. 
  The 
  way 
  they 
  fit 
  in 
  the 
  hand 
  and 
  their 
  shape 
  would 
  

   suggest 
  that 
  they 
  were 
  used 
  in 
  playing 
  some 
  game. 
  

  

  The 
  location 
  of 
  the 
  mound 
  on 
  the 
  edge 
  of 
  the 
  marsh 
  and 
  not 
  

   on 
  the 
  island 
  or 
  the 
  edge 
  of 
  some 
  bayou 
  and 
  its 
  being 
  covered 
  

   with 
  marsh 
  deposits, 
  would 
  seem 
  to 
  indicate 
  that 
  the 
  subsidence 
  

   which 
  has 
  been 
  progressing 
  on 
  the 
  Gulf 
  coast 
  for 
  the 
  last 
  period 
  

   is 
  still 
  going 
  on 
  at 
  a 
  fairly 
  rapid 
  rate. 
  

  

  