﻿LIMESTONES 
  OF 
  NEW 
  YORK 
  AND 
  THEIR 
  ECONOMIC 
  VALUE 
  363 
  

  

  An 
  analysis 
  of 
  the 
  Chazy 
  limestone 
  from 
  the 
  quarry 
  of 
  the 
  

   Chazy 
  marble 
  lime 
  co. 
  at 
  Chazy, 
  shows 
  the 
  high 
  degree 
  of 
  purity 
  

   of 
  this 
  limestone 
  which 
  is 
  used 
  in 
  the 
  manufacture 
  of 
  lime. 
  

  

  Silica 
  72 
  

  

  Ferric 
  oxid 
  and 
  alumina 
  ; 
  . 
  . 
  . 
  . 
  .39 
  

  

  Lime 
  " 
  53.90 
  

  

  Magnesia 
  1 
  . 
  44 
  

  

  Carbon 
  dioxid 
  43 
  . 
  92 
  

  

  100.37 
  

  

  i 
  i 
  : 
  i 
  

  

  Niagara 
  limestone. 
  In 
  Schoharie 
  co. 
  we 
  find 
  the 
  eastern 
  end 
  of 
  

   this 
  formation. 
  Its 
  thickness 
  is 
  not 
  more 
  than 
  five 
  feet 
  and 
  it 
  is 
  

   usually 
  a 
  dark 
  gray 
  massive 
  limestone. 
  An 
  exposure 
  of 
  it 
  can 
  

   be 
  seen 
  at 
  Howe 
  Cave 
  just 
  below 
  the 
  cement 
  quarries 
  of 
  which 
  

   it 
  forms 
  the 
  floor. 
  a 
  

  

  The 
  Niagara 
  limestone 
  also 
  appears 
  in 
  Oneida 
  co. 
  north 
  of 
  

   Clayville 
  and 
  extends 
  westward 
  with 
  increasing 
  width 
  to 
  the 
  

   Niagara 
  river. 
  

  

  In 
  Wayne 
  co. 
  in 
  the 
  town 
  of 
  Butler 
  6 
  it 
  is 
  a 
  dark 
  blue, 
  fine 
  

   grained 
  compact 
  limestone 
  and 
  is 
  usually 
  thin 
  bedded. 
  It 
  has 
  been 
  

   used 
  at 
  this 
  point 
  for 
  burning 
  lime. 
  

  

  Other 
  occurrences 
  are 
  at 
  Rose 
  on 
  the 
  head 
  waters 
  of 
  Sheldon 
  

   creek 
  and 
  in 
  the 
  towns 
  of 
  Marion 
  and 
  Walworth. 
  It 
  has 
  been 
  

   quarried 
  at 
  many 
  points 
  in 
  Wayne 
  co. 
  for 
  the 
  manufacture 
  of 
  lime. 
  

  

  In 
  Monroe 
  co. 
  the 
  northern 
  edge 
  of 
  the 
  limestone 
  passes 
  

   through 
  the 
  towns 
  of 
  Penfield, 
  Brighton, 
  Gates, 
  Ogden 
  and 
  

   Sweden. 
  The 
  outcrops 
  at 
  these 
  points 
  generally 
  represent 
  the 
  

   beds 
  of 
  the 
  upper 
  magnesian 
  member 
  and 
  its 
  weathered 
  surface 
  

   presents 
  a 
  characteristic 
  spongy 
  appearance. 
  

  

  The 
  Niagara 
  formation 
  presents 
  two 
  types 
  of 
  lime 
  rock. 
  The 
  

   one 
  a 
  dark 
  gray 
  subcrystalline 
  stone 
  which 
  is 
  used 
  for 
  lime 
  and 
  

   building 
  purposes, 
  the 
  other 
  a 
  gray-brown, 
  crystalline 
  rock 
  with 
  

   numerous 
  cavities 
  and 
  containing 
  a 
  high 
  percentage 
  of 
  magnesia. 
  

  

  aDarton's 
  Helderberg 
  limestones 
  and 
  associated 
  formations 
  in 
  eastern 
  New 
  York. 
  

   13th 
  an. 
  rep't 
  N. 
  Y. 
  state 
  geol. 
  1893, 
  p. 
  218. 
  

   6Hall. 
  Gecl. 
  4th 
  dist. 
  p.84. 
  

  

  