﻿232 
  Geological 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  island 
  were 
  shipped 
  by 
  light-draught 
  schooners 
  which 
  could 
  enter 
  

   the 
  bay. 
  Finally, 
  at 
  a 
  very 
  considerable 
  expense, 
  Mr. 
  Weeks 
  con- 
  

   nected 
  the 
  island 
  with 
  the 
  main 
  land 
  of 
  Cypremort 
  Point 
  by 
  a 
  

   raised 
  dirt- 
  way. 
  This 
  rendered 
  access 
  to 
  the 
  island 
  much 
  easier. 
  

  

  Surrou7idi7ig 
  country. 
  — 
  The 
  island 
  overlooks, 
  on 
  its 
  western 
  

   side, 
  an 
  arm 
  of 
  Vermillion 
  bay 
  called 
  Weeks' 
  bay. 
  Two 
  bayous 
  

   approach 
  the 
  island 
  near 
  enough 
  to 
  furnish 
  convenient 
  landing 
  

   places. 
  Near 
  the 
  southwestern 
  corner 
  of 
  the 
  island, 
  Garrett's 
  

   bayou 
  is 
  within 
  a 
  hundred 
  yards 
  of 
  the 
  timber. 
  The 
  largest 
  

   bayou 
  and 
  the 
  one 
  which 
  affords 
  the 
  best 
  landing 
  place 
  is 
  Weeks' 
  

   bayou 
  near 
  the 
  northwest 
  corner 
  of 
  the 
  island. 
  It 
  is 
  probably 
  

   more 
  than 
  three 
  hundred 
  feet 
  across 
  and 
  quite 
  deep. 
  Were 
  it 
  

   not 
  for 
  the. 
  shallowness 
  of 
  Vermillion 
  ba}^, 
  which 
  prevents 
  the 
  

   passage 
  of 
  vessels 
  of 
  even 
  moderate 
  draught, 
  water 
  transportation 
  

   of 
  the 
  salt 
  would 
  be 
  quite 
  feasible. 
  Here 
  is 
  the 
  remains 
  of 
  an 
  

   old 
  pier, 
  a 
  relic 
  of 
  the 
  days 
  when 
  water 
  transportation 
  was 
  the 
  

   only 
  thing 
  possible. 
  This 
  bayou 
  skirts 
  the 
  island 
  for 
  a 
  little 
  over 
  

   a 
  quarter 
  of 
  a 
  mile 
  then 
  turns 
  northwestern 
  and 
  finally 
  south- 
  

   westward 
  into 
  Vermillion 
  bay. 
  On 
  three 
  sides 
  of 
  the 
  island 
  is 
  a 
  

   trembling 
  sea 
  marsh 
  ; 
  on 
  the 
  eastern 
  side 
  is 
  a 
  swamp 
  which 
  with- 
  

   out 
  the 
  " 
  causeway 
  " 
  would 
  be 
  utterly 
  impassible. 
  

  

  Topography 
  

  

  Shape 
  atid 
  area. 
  — 
  Grande 
  C6te 
  is 
  almost 
  circular 
  with 
  an 
  

   indentation 
  in 
  the 
  shore 
  line 
  on 
  either 
  side 
  a 
  little 
  above 
  the 
  

   center. 
  The 
  area 
  as 
  shown 
  by 
  the 
  land 
  office 
  records 
  is 
  1907.69 
  

   acres. 
  It 
  is 
  the 
  largest 
  of 
  the 
  islands. 
  

  

  Central 
  ridge. 
  — 
  The 
  " 
  Devil's 
  Backbone," 
  the 
  principle 
  topo- 
  

   graphical 
  feature, 
  extends 
  north 
  from 
  the 
  mine 
  store 
  to 
  near 
  

   boring 
  No. 
  2, 
  thus 
  occupying 
  the 
  central 
  part 
  of 
  the 
  island 
  and 
  

   having 
  a 
  general 
  trend 
  a 
  little 
  east 
  of 
  north. 
  The 
  slopes 
  of 
  the 
  

   gullies 
  on 
  either 
  side 
  of 
  this 
  dividing 
  ridge 
  are 
  almost 
  perpen- 
  

   dicular 
  and 
  from 
  20 
  to 
  60 
  feet 
  in 
  height. 
  Occasionally 
  the 
  divide 
  

   is 
  no 
  wider 
  than 
  a 
  wagon 
  bed 
  and 
  near 
  the 
  northern 
  end 
  is 
  almost 
  

   severed 
  in 
  two 
  or 
  three 
  places. 
  This 
  ridge 
  is 
  from 
  100 
  to 
  

   135 
  feet 
  high 
  and 
  contains 
  the 
  highest 
  point 
  on 
  the 
  island. 
  

   From 
  the 
  mine 
  store 
  it 
  turns 
  eastward 
  and 
  then 
  northward 
  

   giving 
  the 
  whole 
  ridge 
  the 
  shape 
  of 
  a 
  fishhook 
  (Plate 
  25). 
  

  

  The 
  lakes. 
  — 
  In 
  the 
  space 
  thus 
  inclosed 
  by 
  steep 
  hills 
  is 
  Lake 
  

  

  