﻿Ill] 
  

  

  The 
  Five 
  Islands 
  : 
  Belle 
  Isle 
  

  

  Analyses 
  of 
  Salt. 
  

  

  227 
  

  

  Sodium 
  chloride 
  

  

  Calcium 
  sulphate 
  

  

  Magnesium 
  chloride 
  

  

  Magnesium 
  sulphate 
  

  

  Magnesium 
  carbonate 
  

  

  Sodium 
  carbonate 
  

  

  Sodium 
  sulphate 
  

  

  Calcium 
  carbonate 
  

  

  Calcium 
  chloride 
  

  

  Ferric 
  and 
  Aluminic 
  Oxides 
  

   (Fe. 
  O^and 
  Al, 
  O 
  ) 
  .... 
  

  

  Water 
  ." 
  

  

  Insoluble 
  matter 
  

  

  Black 
  salt 
  

   Belle 
  Isle 
  While 
  salt 
  

   I,ayer 
  12 
  Belle 
  Isle 
  

  

  (120 
  ft.) 
  (175 
  ft-) 
  

  

  92.750 
  

  

  .201 
  

   .067 
  

  

  ■837 
  

   1.804 
  

  

  .500 
  

  

  3-325 
  

  

  96405 
  

  

  3-051 
  

  

  .074 
  

  

  .226 
  

  

  .025 
  

  

  -059 
  

  

  Martha's 
  

  

  Vineyard, 
  

  

  Mass. 
  

  

  (Goess- 
  

  

  niann). 
  

  

  94-71 
  

   1.42 
  

  

  • 
  24 
  

  

  •'9 
  

  

  3-24 
  

  

  These 
  analyses 
  show 
  a 
  marked 
  difference 
  between 
  the 
  black 
  

   and 
  white 
  salt 
  of 
  Belle 
  Isle 
  and 
  a 
  close 
  similarity 
  between 
  the 
  

   white 
  salt 
  and 
  salt 
  obtained 
  from 
  sea 
  water 
  by 
  evaporation. 
  

  

  Limestone 
  in 
  salt. 
  — 
  The 
  white 
  chalk-like 
  limestone, 
  eight 
  inches 
  

   thick 
  struck 
  74 
  feet 
  below 
  the 
  top 
  of 
  the 
  salt 
  shows 
  no 
  traces 
  of 
  

   organic 
  remains. 
  It 
  is 
  composed 
  of 
  extremely 
  small 
  globular 
  

   grains, 
  like 
  an 
  oolite, 
  only 
  the 
  grains 
  are 
  much 
  smaller. 
  The 
  

   presence 
  of 
  a 
  limestone 
  of 
  this 
  type 
  in 
  the 
  midst 
  of 
  a 
  salt 
  deposit 
  

   possibly 
  indicates 
  a 
  continental 
  movement 
  of 
  considerable 
  mag- 
  

   nitude 
  during 
  the 
  deposition 
  of 
  the 
  salt. 
  

  

  Section 
  of 
  hole 
  No. 
  12. 
  About 
  150 
  yards 
  northwest 
  of 
  the 
  shaft 
  

  

  and 
  near 
  the 
  old 
  U. 
  S. 
  Engineers 
  pits 
  in 
  hole 
  12. 
  It 
  is 
  ten 
  feet 
  

  

  higher 
  than 
  the 
  shaft. 
  

  

  Hole 
  No. 
  12. 
  

   No. 
  Depths 
  Feet 
  

  

  1. 
  0-12 
  Clay 
  and 
  sandy 
  barytic 
  limestone 
  12 
  

  

  2. 
  12-21 
  Blue 
  clay 
  9 
  

  

  3. 
  21- 
  53 
  Blue 
  clay 
  with 
  indurate 
  dark 
  colored 
  clay 
  32 
  

  

  4. 
  53- 
  80 
  Dark 
  colored 
  clay 
  27 
  

  

  5. 
  80-103 
  Dark 
  colored 
  clay 
  with 
  hard 
  bands 
  33 
  

  

  6. 
  103-130 
  Dark 
  colored 
  clay 
  21 
  

  

  7. 
  1 
  30-1 
  3 
  1 
  Hard 
  bowlder 
  (probably 
  similar 
  to 
  6 
  of 
  the 
  shaft 
  

  

  section) 
  i 
  

  

  8. 
  131-138 
  Dark 
  colored 
  clay 
  7 
  

  

  9. 
  138-213 
  Salt 
  with 
  dark 
  colored 
  clay 
  75 
  

  

  