﻿432 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Clinton 
  county 
  

  

  The 
  Trenton 
  and 
  Chazy 
  limestones 
  occupy 
  a 
  broad 
  belt 
  which 
  

   extends 
  along 
  the 
  western 
  side 
  of 
  Lake 
  Champlain 
  from 
  Peru 
  

   northward 
  to 
  the 
  Canadian 
  boundary, 
  the 
  western 
  edge 
  passing 
  

   close 
  to 
  West 
  Chazy, 
  Chazy 
  and 
  Coopersville. 
  

  

  Chazy 
  limestone. 
  This 
  limestone 
  is 
  well 
  exposed 
  at 
  the 
  village 
  

   of 
  Chazy 
  as 
  well 
  as 
  in 
  other 
  portions 
  of 
  Chazy 
  township, 
  specially 
  

   just 
  north 
  of 
  Plattsburg, 
  and 
  on 
  Bluffpoint 
  two 
  miles 
  south 
  of 
  

   the 
  latter 
  place, 
  whence 
  it 
  extends 
  south 
  into 
  Peru 
  where 
  the 
  

   lower 
  portion 
  of 
  the 
  formation 
  is 
  well 
  shown. 
  The 
  aggregate 
  

   thickness 
  of 
  the 
  Chazy 
  limestone 
  at 
  Chazy 
  village 
  is 
  740 
  feet, 
  

   while 
  at 
  Valcour 
  it 
  is 
  said 
  to 
  be 
  890 
  feet. 
  The 
  rock 
  is 
  quarried 
  at 
  

   a 
  number 
  of 
  points 
  either 
  for 
  obtaining 
  marble, 
  rough 
  buildiDg 
  

   stone 
  or 
  stone 
  for 
  lime. 
  

  

  Black 
  river 
  limestone. 
  The 
  rocks 
  of 
  this 
  group 
  occur 
  as 
  massive 
  

   dark 
  colored 
  beds, 
  but 
  are 
  well 
  exposed 
  at 
  numerous 
  points 
  in 
  

   Chazy 
  overlying 
  the 
  Chazy 
  limestone, 
  but 
  outside 
  of 
  the 
  village 
  

   and 
  in 
  Chazy 
  township 
  it 
  is 
  not 
  very 
  well 
  exposed. 
  According 
  

   to 
  Cushing 
  it 
  has 
  a 
  thickness 
  of 
  30 
  to 
  50 
  feet 
  and 
  is 
  a 
  brittle 
  

   black 
  limestone 
  with 
  a 
  conchoidal 
  fracture. 
  

  

  Trenton 
  limestone. 
  This 
  is 
  also 
  well 
  exposed 
  in 
  Chazy 
  town- 
  

   ship 
  and 
  in 
  addition 
  in 
  Plattsburg 
  township. 
  Cushing 
  states 
  

   that 
  in 
  the 
  bed 
  of 
  the 
  river 
  just 
  east 
  of 
  the 
  Chazy 
  village 
  150 
  feet 
  

   are 
  exposed 
  lying 
  on 
  the 
  Black 
  river 
  limestone, 
  while 
  on 
  Crab 
  

   island 
  about 
  200 
  feet 
  of 
  it 
  can 
  be 
  seen. 
  The 
  lower 
  portion 
  of 
  the 
  

   Trenton 
  limestone 
  generally 
  exhibits 
  beds 
  of 
  a 
  slaty 
  character 
  

   and 
  is 
  probably 
  of 
  insufficient 
  purity 
  for 
  any 
  chemical 
  use 
  except 
  

   that 
  of 
  making 
  common 
  lime 
  and 
  for 
  fertilizing 
  purposes. 
  Also 
  

   in 
  northeastern 
  Plattsburg 
  township, 
  and 
  extending 
  into 
  south- 
  

   eastern 
  Beekmantown, 
  the 
  rocks 
  according 
  to 
  Cushing 
  form 
  a 
  

   series 
  of 
  black 
  slaty 
  limestones 
  which 
  are 
  excellently 
  exposed 
  

   on 
  Cumberland 
  head. 
  a 
  

  

  a 
  Cushing. 
  Geology 
  of 
  Clinton 
  county. 
  An. 
  rep't 
  N. 
  Y. 
  state 
  geol. 
  p. 
  613. 
  

  

  