﻿452 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  many 
  crystals 
  of 
  white 
  or 
  light 
  green 
  pyroxene 
  scattered 
  through 
  

   it. 
  Mica 
  flakes 
  are 
  also 
  abundant 
  in 
  the 
  rock. 
  It 
  is 
  a 
  magnesian 
  

   limestone 
  with 
  considerable 
  silica 
  in 
  its 
  composition. 
  

  

  The 
  quarry 
  at 
  Paterson 
  is 
  on 
  the 
  Haight 
  property 
  half 
  a 
  mile 
  

   southeast 
  of 
  the 
  railway 
  depot. 
  The 
  opening 
  is 
  about 
  15 
  by 
  40 
  

   feet 
  and 
  60 
  feet 
  deep. 
  A 
  number 
  of 
  blocks 
  of 
  stone 
  have 
  been 
  

   taken 
  out 
  but 
  all 
  show 
  the 
  rock 
  to 
  be 
  full 
  of 
  mineral 
  impurities 
  

   so 
  that 
  it 
  would 
  not 
  make 
  a 
  very 
  high 
  grade 
  lime. 
  

  

  Rensselaer 
  county 
  

  

  A 
  belt 
  of 
  impure 
  limestone 
  of 
  Cambrian 
  age 
  extends 
  from 
  

   Lebanon 
  Springs 
  to 
  Petersburg, 
  but 
  outcrops 
  are 
  scarce. 
  

  

  Another 
  small 
  area 
  extends 
  from 
  the 
  vicinity 
  of 
  North 
  Peters- 
  

   burg 
  to 
  Eagle 
  Bridge 
  -and 
  underlying 
  an 
  area 
  several 
  miles 
  wide 
  

   west 
  of 
  Hoosick 
  Falls. 
  At 
  this 
  latter 
  locality 
  a 
  number 
  of 
  small 
  

   quarries 
  have 
  been 
  opened 
  on 
  a 
  hill 
  west 
  of 
  the 
  town 
  and 
  show 
  

   well 
  the 
  varying 
  character 
  of 
  the 
  stone 
  as 
  well 
  as 
  its 
  purity 
  in 
  

   certain 
  beds. 
  The 
  rock 
  varies 
  from 
  a 
  nearly 
  pure 
  limestone 
  to 
  a 
  

   black 
  calcareous 
  slate. 
  It 
  has 
  been 
  used 
  to 
  some 
  extent 
  for 
  flux 
  

   in 
  a 
  local 
  furnace 
  while 
  some 
  has 
  been 
  shipped 
  to 
  Troy, 
  and 
  at 
  

   times 
  it 
  has 
  also 
  been 
  used 
  for 
  lime 
  manufacture. 
  

  

  The 
  best 
  stone 
  is 
  found 
  in 
  Cornelius 
  MeCaffery's 
  quarry. 
  The 
  

   section 
  there 
  is 
  nearly 
  60 
  feet 
  thick, 
  rather 
  flinty 
  in 
  the 
  upper 
  

   part 
  but 
  in 
  the 
  lower 
  yielding 
  stone 
  which 
  analyzed: 
  

  

  Silica 
  , 
  . 
  1.20 
  

  

  Ferric 
  oxid 
  1 
  . 
  50 
  

  

  Alumina 
  2.00 
  

  

  Lime 
  34.11 
  

  

  Magnesia 
  8.97 
  

  

  Saratoga 
  county 
  

  

  Bandyliill. 
  Both 
  the 
  Calciferous 
  and 
  Trenton 
  limestones 
  occur 
  

   in 
  Sandyhill. 
  The 
  Calciferous 
  is 
  quarried 
  by 
  Higley, 
  Monty 
  & 
  

  

  