﻿444 
  ' 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Another 
  limestone 
  quarry 
  has 
  been 
  opened 
  by 
  George 
  Ross 
  oh 
  

   the 
  eastern 
  edge 
  of 
  the 
  town. 
  The 
  rock 
  has 
  thus 
  far 
  been 
  used 
  

   only 
  for 
  structural 
  work. 
  It 
  contains 
  some 
  sandy 
  streaks 
  which 
  

   could 
  be 
  separated 
  if 
  the 
  stone 
  were 
  to 
  be 
  burned 
  into 
  lime. 
  The 
  

   average 
  composition 
  of 
  the 
  stone 
  is 
  : 
  

  

  Silica 
  7.46 
  

  

  Alumina 
  2 
  . 
  48 
  

  

  Ferric 
  oxid 
  1 
  . 
  07 
  

  

  Lime 
  carbonate 
  71 
  .76 
  

  

  Magnesium 
  carbonate 
  18 
  . 
  19 
  

  

  101.46 
  

  

  This 
  rock 
  is 
  probably 
  Calciferous 
  and 
  not 
  Trenton 
  judging 
  from 
  

   its 
  magnesian 
  character. 
  Portions 
  of 
  it 
  in 
  the 
  eastern 
  end 
  of 
  the 
  

   quarry 
  run 
  as 
  low 
  as 
  4$ 
  in 
  insoluble 
  matter. 
  

  

  Niagara 
  county 
  

  

  The 
  limestone 
  passes 
  through 
  the 
  towns 
  of 
  Royalton, 
  Lockport, 
  

   Cambria 
  and 
  Lewiston. 
  In 
  this 
  county 
  the 
  Guelph 
  or 
  magnesian 
  

   member 
  is 
  missing 
  but 
  the 
  lower 
  member 
  is 
  of 
  increased 
  thick- 
  

   ness. 
  The 
  lower 
  beds 
  overlying 
  the 
  shale 
  are 
  apt 
  to 
  be 
  somewhat 
  

   siliceous 
  but 
  the 
  upper 
  ones 
  are 
  a 
  crinoidal 
  limestone 
  of 
  greater 
  

   purity. 
  

  

  The 
  following 
  section 
  of 
  beds 
  composing 
  the 
  Niagara 
  limestone 
  

   at 
  Lockport 
  is 
  given 
  by 
  "Prof. 
  Hall. 
  a 
  

  

  5 
  Thinly 
  laminated 
  blackish 
  gray 
  limestone 
  with 
  thin 
  laminae 
  

   of 
  bituminous 
  shaly 
  matter, 
  the 
  whole 
  exhibiting 
  a 
  tendency 
  to 
  

   a 
  concretionary 
  or 
  contorted 
  structure 
  and 
  the 
  surface 
  of 
  the 
  

   layers 
  marked 
  by 
  small 
  knobs. 
  

  

  4 
  Grayish 
  brown 
  bituminous 
  limestone, 
  the 
  lower 
  part 
  with 
  

   irregular 
  cavities 
  containing 
  spar. 
  

  

  3 
  A 
  dark 
  colored 
  limestone 
  with 
  cavities 
  and 
  veins 
  of 
  spar 
  

   often 
  concretionary. 
  

  

  2 
  Irregularly 
  thick 
  bedded 
  limestone 
  of 
  a 
  light 
  gray 
  color, 
  also 
  

   containing 
  cavities 
  lined 
  with 
  spar. 
  

  

  o-Geol. 
  4th 
  dist. 
  p. 
  89. 
  j 
  

  

  