﻿436 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  the 
  following 
  analysis 
  made 
  by 
  H. 
  Carlson 
  and 
  quoted 
  by 
  

   Bishop 
  : 
  a 
  

  

  Lime 
  carbonate 
  ."..." 
  96.54 
  

  

  Magnesia 
  carbonate 
  1 
  . 
  00 
  

  

  Iron 
  and 
  alumina 
  oxid 
  .84 
  

  

  Silica 
  17 
  

  

  Sulfur 
  ... 
  .101 
  

  

  Phosphorus 
  . 
  017 
  

  

  98.668 
  

  

  Some 
  of 
  the 
  rock 
  is 
  used 
  for 
  smelting 
  purposes 
  and 
  the 
  waste 
  

   is 
  burned 
  for 
  lime. 
  

  

  Corniferous 
  limestone. 
  The 
  chief 
  use 
  for 
  this 
  is 
  also 
  for 
  build- 
  

   ing 
  operations. 
  The 
  largest 
  quarry 
  in 
  Erie 
  co. 
  is 
  that 
  of 
  the 
  

   Buffalo 
  cement 
  works 
  but 
  there 
  are 
  numerous 
  other 
  smaller 
  ones. 
  

   The 
  limestone 
  while 
  making 
  a 
  good 
  building 
  material 
  on 
  account 
  

   of 
  its 
  hardness 
  is 
  very 
  cherty 
  in 
  places, 
  and 
  therefore 
  for 
  any 
  

   chemical 
  or 
  similar 
  work 
  would 
  probably 
  have 
  to 
  be 
  handpicked. 
  

   The 
  limestone 
  is 
  usually 
  thick 
  bedded. 
  

  

  Essex 
  county 
  

  

  Three 
  distinct 
  areas 
  of 
  Chazy 
  and 
  Trenton 
  limestones 
  occur 
  in 
  

   this 
  CQunty, 
  The 
  first 
  forms 
  Willsboro 
  point 
  and 
  extends 
  south- 
  

   ward 
  as 
  far 
  as 
  Whallonsburg. 
  A 
  second 
  area 
  begins 
  at 
  West- 
  

   port 
  and 
  extends 
  southward 
  about 
  six 
  miles. 
  A 
  third 
  area 
  forms 
  

   Crown 
  point 
  and 
  extends 
  southward 
  to 
  the 
  town 
  of 
  that 
  name. 
  

   A 
  fourth 
  is 
  on 
  Larrabee's 
  point. 
  

  

  The 
  Black 
  river 
  limestone 
  member 
  of 
  the 
  Trenton 
  is 
  usually 
  

   heavy 
  bedded, 
  very 
  tough 
  and 
  compact. 
  The 
  rock 
  has 
  been 
  quar- 
  

   ried 
  on 
  Crown 
  point. 
  

  

  On 
  Crown 
  point 
  the 
  Trenton 
  proper 
  is 
  150 
  feet 
  thick, 
  but 
  is 
  

   usually 
  thin 
  bedded, 
  showing 
  alternations 
  of 
  limestone 
  and 
  shale 
  

   layers. 
  

  

  The 
  Trenton 
  has 
  been 
  used 
  at 
  several 
  places 
  for 
  making 
  lime 
  

   but 
  no 
  definite 
  statement 
  can 
  be 
  made 
  concerning 
  the 
  purity 
  of 
  

  

  a 
  Geology 
  of 
  Erie 
  county, 
  15th 
  an. 
  rep't 
  N. 
  Y. 
  state 
  geol. 
  

  

  