﻿LIMESTONES 
  OF 
  NEW 
  YORK 
  AND 
  THEIR 
  ECONOMIC 
  VALUE 
  455 
  

  

  At 
  Gouverneur 
  extensive 
  quarries 
  have 
  been 
  opened 
  for 
  ob- 
  

   taining 
  marble 
  and 
  much 
  of 
  the 
  refuse 
  is 
  used 
  for 
  lime. 
  

  

  This 
  stone 
  often 
  runs 
  low 
  in 
  impurities, 
  as 
  indicated 
  by 
  the 
  

   following 
  analysis 
  made 
  by 
  J. 
  D. 
  Irving: 
  

  

  Silica 
  1.85 
  

  

  Alumina 
  .23 
  

  

  Ferric 
  oxid 
  .38 
  

  

  Lime 
  carbonate 
  92 
  . 
  29 
  

  

  Magnesium 
  carbonate 
  4.28 
  

  

  99.03 
  

  

  The 
  crystalline 
  limestone 
  is 
  well 
  exposed 
  at 
  Harrisville, 
  N. 
  Y. 
  

   in 
  the 
  quarries 
  of 
  the 
  Harrisville 
  marble 
  co. 
  which 
  lie 
  about 
  half 
  

   a 
  mile 
  from 
  the 
  C. 
  & 
  A. 
  R. 
  R. 
  The 
  rock 
  there 
  approaches 
  very 
  

   closely 
  in 
  composition 
  to 
  the 
  mine 
  at 
  Gouverneur. 
  At 
  Lewis- 
  

   burg, 
  N. 
  Y. 
  there 
  is 
  a 
  considerable 
  ledge 
  of 
  crystalline 
  limestone 
  

   on 
  the 
  Hungerford 
  farm, 
  near 
  Lewisburg, 
  about 
  four 
  and 
  one 
  

   half 
  miles 
  north 
  of 
  Natural 
  Bridge. 
  It 
  is 
  rather 
  far 
  from 
  a 
  rail- 
  

   road, 
  but 
  it 
  has 
  been 
  estimated 
  that 
  it 
  could 
  be 
  put 
  on 
  the 
  car 
  at 
  

   Natural 
  Bridge 
  for 
  $1.35 
  a 
  ton. 
  The 
  stone 
  is 
  coarsely 
  granular 
  

   but 
  not 
  very 
  hard. 
  Certain 
  portions 
  of 
  the 
  rock 
  are 
  very 
  white, 
  

   evidently 
  quite 
  pure 
  but 
  rather 
  free 
  from 
  silica. 
  At 
  other 
  times 
  

   it 
  contains 
  an 
  abundance 
  of 
  mica 
  grains. 
  

  

  Ulster 
  county 
  

  

  The 
  limestone 
  formations 
  occurring 
  in 
  Ulster 
  co. 
  together 
  with 
  

   their 
  thickness 
  is 
  as 
  follows 
  : 
  a 
  

   Onondaga, 
  60 
  ft 
  cherty 
  

   Upper 
  shaly 
  limestone, 
  30-125 
  ft 
  impure 
  

   Becraft 
  limestone, 
  20-30 
  ft 
  fairly 
  pure 
  

   Lower 
  shaly 
  limestone, 
  60 
  ft 
  impure 
  

   Pentamerous, 
  30-60 
  ft 
  dark 
  massive 
  

   Tentaculite 
  limestone, 
  20-40 
  ft 
  thin 
  bedded 
  

   Cement 
  series, 
  20-50 
  ft 
  cement 
  and 
  waterlime 
  

   Niagara 
  limestone, 
  0-45 
  ft 
  

   Wappinger 
  limestone, 
  200 
  ft 
  siliceous 
  

  

  oDarton. 
  Geology 
  of 
  Ulster 
  co. 
  p. 
  297. 
  

  

  