﻿LIMESTONES 
  OF 
  NEW 
  YORK 
  AND 
  THEIR 
  ECONOMIC 
  VALUE 
  459 
  

  

  "At 
  High 
  falls 
  the 
  upper 
  bed 
  is 
  15 
  feet 
  thick, 
  the 
  lower 
  bed 
  

   5 
  feet 
  thick 
  with 
  3 
  feet 
  of 
  intervening 
  beds 
  of 
  waterlime 
  rock. 
  

   The 
  High 
  falls 
  are 
  over 
  the 
  thicker 
  beds." 
  

  

  Darton 
  also 
  states 
  that 
  " 
  cement 
  may 
  be 
  looked 
  for 
  in 
  the 
  

   upper 
  Kondout 
  valley, 
  from 
  Port 
  Jackson 
  to 
  Ellenville, 
  but 
  owing 
  

   to 
  the 
  absence 
  of 
  outcrops 
  this 
  should 
  only 
  be 
  regarded 
  as 
  a 
  

   suggestion." 
  

  

  Nothing 
  further 
  will 
  be 
  said 
  in 
  this 
  portion 
  of 
  the 
  report 
  con- 
  

   cerning 
  the 
  Eosendale 
  cement 
  rock 
  as 
  it 
  is 
  mentioned 
  more 
  fully 
  

   in 
  the 
  chapter 
  on 
  natural 
  cements. 
  

  

  Coralline 
  or 
  Niagara 
  limestone. 
  This 
  forms 
  a 
  thin 
  bed 
  under- 
  

   lying 
  the 
  cement 
  at 
  Kondout. 
  It 
  is 
  a 
  dark 
  gray 
  limestone 
  of 
  vari- 
  

   able 
  thickness. 
  Under 
  the 
  cement 
  at 
  Rondout 
  it 
  is 
  7 
  feet, 
  but 
  

   at 
  the 
  entrance 
  to 
  the 
  Becraft 
  limestone 
  quarries 
  one 
  mile 
  north 
  

   of 
  East 
  Kingston 
  it 
  is 
  only 
  5 
  inches. 
  

  

  Warren 
  county 
  

  

  At 
  Glens 
  Falls 
  the 
  Trenton 
  limestone 
  has 
  been 
  quarried 
  for 
  a 
  

  

  number 
  of 
  years 
  for 
  lime 
  manufacture 
  and 
  the 
  product 
  bears 
  an 
  

  

  excellent 
  reputation. 
  

  

  There 
  are 
  four 
  companies 
  operating 
  lime 
  quarries 
  but 
  the 
  rock 
  

  

  in 
  all 
  of 
  them 
  is 
  very 
  much 
  the 
  same. 
  The 
  section 
  in 
  the 
  quarry 
  

  

  beginning 
  at 
  the 
  top 
  consists 
  of: 
  

  

  Thin 
  bedded 
  impure 
  black 
  limestone 
  12 
  to 
  15 
  ft 
  

  

  Massive 
  black 
  limestone 
  2 
  to 
  3 
  

  

  Fine 
  grained, 
  black, 
  crystalline 
  limestone 
  15 
  

  

  The 
  upper 
  bed 
  is 
  used 
  for 
  building 
  and 
  also 
  for 
  portland 
  

   cement, 
  being 
  mixed 
  with 
  the 
  overlying 
  clay; 
  the 
  lower 
  bed 
  makes 
  

   a 
  high 
  grade 
  of 
  lime. 
  The 
  following 
  partial 
  analysis 
  represents 
  

   the 
  composition 
  of 
  the 
  upper 
  stone 
  : 
  a 
  

  

  Silica 
  3.90 
  

  

  Alumina 
  1 
  . 
  30 
  

  

  Ferric 
  oxid 
  

  

  Lime 
  52.15 
  

  

  Magnesium 
  1 
  . 
  58 
  

  

  Sulfuric 
  acid 
  .30 
  

  

  a 
  Mineral 
  industry. 
  1897. 
  

  

  