﻿188 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  and 
  in 
  Clayton, 
  Jefferson 
  county. 
  In 
  parts 
  of 
  Clinton 
  county 
  the 
  

   stone 
  is 
  too 
  friable 
  for 
  building. 
  

  

  The 
  most 
  extensive 
  openings 
  are 
  near 
  Potsdam; 
  the 
  stone 
  

   is 
  hard, 
  compact 
  and 
  even-grained, 
  and 
  pink 
  to 
  red 
  in 
  color. 
  

   Some 
  of 
  it 
  has 
  a 
  laminated 
  structure 
  and 
  striped 
  appearance. 
  It 
  

   is 
  an 
  excellent 
  building 
  stone 
  and 
  is 
  widely 
  known 
  and 
  esteemed 
  

   for 
  its 
  beauty 
  and 
  durability. 
  

  

  The 
  Hammond 
  quarries 
  produce 
  a 
  gray 
  to 
  red 
  stone. 
  Nearly 
  

   all 
  of 
  the 
  output 
  is 
  cut 
  into 
  paving 
  blocks 
  and 
  street 
  material. 
  

  

  Hudson 
  river 
  sandstone 
  

  

  Rocks 
  of 
  this 
  group 
  outcrop 
  in 
  Orange 
  county, 
  northwest 
  

   of 
  the 
  Highlands 
  and 
  in 
  the 
  valley 
  of 
  the 
  Hudson 
  river 
  north- 
  

   ward 
  to 
  the 
  Champlain 
  valley 
  in 
  Washington 
  county. 
  From 
  the 
  

   Hudson 
  westward, 
  the 
  Mohawk 
  valley 
  is 
  partly 
  occupied 
  by 
  them. 
  

   The 
  belt 
  increases 
  thence 
  in 
  breadth, 
  in 
  a 
  northwest 
  course 
  across 
  

   Oneida, 
  Oswego 
  and 
  Lewis 
  counties, 
  and 
  continues 
  to 
  Lake 
  

   Ontario. 
  ' 
  1 
  

  

  The 
  rocks 
  consist 
  of 
  shales 
  interbedded 
  with 
  sandstones 
  and 
  

   silicious 
  conglomerates. 
  

  

  The 
  sandstones 
  are 
  generally 
  fine-grained 
  and 
  of 
  light-gray 
  or 
  

   greenish-gray 
  color. 
  They 
  are 
  often 
  argillaceous 
  and 
  not 
  adapted 
  

   for 
  building 
  purposes. 
  But 
  the 
  even-bedded 
  and 
  well-marked 
  

   jointed 
  structure 
  makes 
  the 
  quarrying 
  comparatively 
  easy, 
  and 
  

   the 
  nearness 
  to 
  lines 
  of 
  transportation, 
  and 
  to 
  the 
  cities 
  of 
  the 
  

   Hudson 
  and 
  Mohawk 
  valleys 
  have 
  stimulated 
  the 
  opening 
  of 
  

   quarries 
  at 
  many 
  points. 
  

  

  For 
  common 
  rubble 
  work 
  and 
  for 
  local 
  use, 
  the 
  quarries 
  in 
  this 
  

   formation 
  have 
  furnished 
  a 
  large 
  amount 
  of 
  stone. 
  The 
  more 
  

   important 
  quarrying 
  centers 
  are 
  now 
  at 
  Rhinecliff-on-the-Hudson,. 
  

   New 
  Baltimore 
  and 
  Troy, 
  in 
  the 
  Hudson 
  valley; 
  at 
  Aqueduct, 
  

   Schenectady 
  and 
  Duanesburg, 
  Schenectady 
  county; 
  and 
  Frank- 
  

   fort 
  Hill, 
  Oneida 
  county. 
  Flagstones 
  are 
  quarried 
  from 
  this 
  

   formation 
  in 
  the 
  gorge 
  of 
  the 
  Bozenkill 
  a 
  few 
  miles 
  northwest 
  

   of 
  Altamont, 
  Albany 
  county. 
  

  

  