﻿LIMESTONES 
  OF 
  NEW 
  YORK 
  AND 
  THEIR 
  ECONOMIC 
  VALUE 
  437 
  

  

  any 
  given 
  beds 
  as 
  they 
  are 
  variable. 
  At 
  times 
  the 
  rock 
  is 
  quite 
  

   low 
  in 
  silica. 
  

  

  Quarries 
  have 
  been 
  opened 
  on 
  Willsboro 
  point 
  and 
  in 
  the 
  town 
  

   of 
  Essex. 
  

  

  A 
  partial 
  analysis 
  of 
  the 
  Chazy 
  limestone 
  on 
  Willsboro 
  point 
  

   furnished 
  the 
  writer 
  by 
  Prof. 
  J. 
  F. 
  Kemp 
  showed: 
  

  

  Lime 
  51.00 
  

  

  Magnesia 
  1 
  . 
  00 
  

  

  Silica 
  2.43 
  

  

  Greene 
  county 
  

  

  West 
  of 
  Catskill 
  the 
  Becraft 
  limestone 
  has 
  been 
  extensively 
  

   quarried 
  by 
  George 
  Holdredge. 
  

  

  The 
  rock 
  shows 
  the 
  usual 
  coarse 
  grained 
  fossiliferous 
  char- 
  

   acter 
  and 
  the 
  beds 
  lie 
  nearly 
  horizontal 
  with 
  a 
  slight 
  dip 
  to 
  the 
  

   west. 
  

  

  The 
  stone 
  is 
  quite 
  homogeneous 
  and 
  a 
  sample 
  analyzed 
  by 
  the 
  

   writer 
  and 
  representing 
  the 
  average 
  of 
  the 
  quarry 
  gave 
  : 
  

  

  Silica 
  2.75 
  

  

  Alumina 
  1 
  . 
  50 
  

  

  Ferric 
  oxid 
  1 
  . 
  60 
  

  

  Lime 
  53.10 
  

  

  Carbonic 
  acid 
  42 
  . 
  10 
  

  

  101.05 
  

  

  The 
  quarries 
  lie 
  about 
  one 
  mile 
  from 
  the 
  river 
  and 
  the 
  West 
  

   Shore 
  R. 
  R. 
  

  

  Herkimer 
  county 
  

  

  Calciferous 
  sandrock 
  occurs 
  in 
  the 
  county 
  around 
  Little- 
  

   falls 
  and 
  is 
  well 
  exposed 
  in 
  several 
  quarries 
  in 
  the 
  town. 
  It 
  is 
  

   generally 
  a 
  light 
  bluish 
  gray, 
  fine 
  grained, 
  massive 
  bedded 
  

   sandy 
  limestone 
  whose 
  weathered 
  surfaces 
  are 
  generally 
  dirty 
  

   buff. 
  

  

  