﻿200 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Trenton 
  limestone 
  

  

  Under 
  this 
  head 
  the 
  Chazy, 
  Birdseye, 
  Black 
  river 
  and 
  Trenton 
  

   limestones 
  are 
  included. 
  

  

  The 
  Chazy 
  limestone 
  crop® 
  out 
  in 
  Eissex 
  and 
  Clinton 
  counties 
  

   and 
  in 
  the 
  Champlain 
  valley 
  — 
  ^its 
  typical 
  localities. 
  The 
  beds 
  

   are 
  thick 
  and 
  generally 
  uneven. 
  Kegular 
  systems 
  of 
  joints 
  help 
  

   the 
  quarrymen 
  in 
  getting 
  out 
  large 
  blocks. 
  Quarries 
  at 
  Wills- 
  

   boro 
  Point 
  and 
  near 
  Plattsburg 
  are 
  in 
  the 
  horizon 
  of 
  the 
  Chazy. 
  

   The 
  stone 
  is 
  suitable 
  for 
  bridge 
  vv^ork 
  and 
  for 
  heavy 
  masonry. 
  

  

  The 
  members 
  of 
  the 
  Trenton 
  above 
  the 
  Chazy 
  limestone 
  are 
  

   recognized 
  in 
  may 
  outcrops 
  in 
  the 
  southeastern 
  part 
  of 
  the 
  

   state; 
  in 
  the 
  Hudson-Champlain 
  valley; 
  in 
  the 
  Mohawk 
  valley; 
  

   in 
  the 
  valley 
  of 
  the 
  Black 
  river 
  and 
  northwest, 
  bordering 
  Lake 
  

   Ontario; 
  and 
  in 
  a 
  border 
  zone 
  on 
  the 
  no-rth 
  of 
  the 
  Adirondacks, 
  

   in 
  the 
  St 
  Lawrence 
  valley. 
  In 
  a 
  formation 
  so 
  widely-extended 
  

   there 
  is, 
  as 
  might 
  be 
  expected, 
  some 
  variation 
  in 
  bedding, 
  texture 
  

   and 
  color. 
  Much 
  of 
  the 
  Trenton 
  limestone 
  formation 
  proper 
  is 
  

   thin-bedded 
  and 
  shaly 
  and 
  unfit 
  for 
  building 
  stone. 
  In 
  the 
  Birds- 
  

   eye 
  also 
  the 
  stone 
  of 
  many 
  loicalities 
  is 
  disfigured 
  on 
  weathering, 
  

   by 
  its 
  peculiar 
  foissils. 
  Generally 
  the 
  stone 
  is 
  sub-crystalline, 
  

   hard 
  and 
  compact 
  and 
  of 
  a 
  high 
  specific 
  gravity 
  and 
  dark-blue 
  

   to 
  gray 
  in 
  color. 
  But 
  the 
  variation 
  is 
  wide, 
  as 
  for 
  example, 
  be- 
  

   tween 
  the 
  black 
  marble 
  of 
  Glens 
  Falls 
  and 
  the 
  gray, 
  crystalline 
  

   nock 
  of 
  the 
  Prospect 
  quarries 
  near 
  Trenton 
  Falls. 
  The 
  variation 
  

   is 
  often 
  great 
  within 
  the 
  range 
  of 
  a 
  comparatively 
  few 
  feet 
  ver- 
  

   tically; 
  and 
  the 
  same 
  quarry 
  may 
  yield 
  two 
  or 
  more 
  varieties 
  of 
  

   building 
  stone. 
  In 
  several 
  quarries 
  the 
  Birdseye 
  and 
  Trenton 
  

   are 
  both 
  represented. 
  Many 
  quarries 
  have 
  been 
  opened 
  in 
  the 
  

   foirmation 
  and 
  there 
  are 
  many 
  more 
  localities 
  where 
  stone 
  has 
  

   been 
  taken 
  from 
  outcropping 
  ledges, 
  which 
  are 
  not 
  developed 
  

   into 
  quarries 
  proper. 
  The 
  more 
  important 
  localities 
  which 
  are 
  

   worked 
  steadily 
  are: 
  Glens 
  Falls, 
  Amsterdam, 
  Tribes 
  Hill, 
  Cana- 
  

   joharie. 
  Palatine 
  Bridge 
  and 
  Prospect 
  in 
  the 
  valley 
  of 
  the 
  Mo- 
  

   hawk; 
  and 
  Lowville, 
  Watertown, 
  Three 
  Mile 
  Bay, 
  Chanmont 
  

   and 
  Ogdensburg 
  in 
  the 
  Black 
  river 
  and 
  St 
  Lawrence 
  valleys. 
  

   The 
  railroad 
  and 
  oanal 
  lines, 
  which 
  traverse 
  the 
  territory 
  occu- 
  

  

  