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  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Quartz 
  is 
  the 
  principal 
  mineral 
  constituent 
  associated 
  with 
  

   some 
  kaolinized 
  feldspar. 
  The 
  cementing 
  material 
  is 
  mainly 
  

   oxide 
  of 
  iron, 
  with 
  less 
  carbonate 
  of 
  lime. 
  The 
  stone 
  is 
  even- 
  

   bedded 
  and 
  the 
  strata 
  dip 
  gently 
  southward. 
  The 
  prevailing 
  

   systems 
  of 
  vertical 
  joints, 
  generally 
  at 
  right 
  angles 
  to 
  one 
  an- 
  

   other, 
  divide 
  the 
  beds 
  into 
  blocks, 
  facilitating 
  the 
  labor 
  of 
  

   quarrying. 
  

  

  Quarries 
  have 
  been 
  opened 
  at 
  Fulton, 
  Granby 
  and 
  Oswego, 
  in 
  

   Oswego 
  county; 
  at 
  several 
  points 
  in 
  Wayne 
  county; 
  at 
  Rochester^ 
  

   on 
  the 
  Irondequoit 
  creek, 
  and 
  at 
  Brockport, 
  Monroe 
  county; 
  at 
  

   Holley, 
  Hulburton, 
  Hindsburg, 
  Albion, 
  Medina 
  and 
  Shelby 
  Basin^ 
  

   in 
  Orleans 
  county; 
  and 
  at 
  Lockport 
  and 
  Lewiston, 
  in 
  Niagara 
  

   county. 
  The 
  Medina 
  sandstone 
  district 
  proper 
  is 
  restricted 
  to 
  

   the 
  group 
  of 
  quarries 
  from 
  Brockport 
  west 
  to 
  Lockport. 
  

  

  The 
  leading 
  varieties 
  of 
  stone 
  are 
  known 
  as 
  the 
  Medina 
  red 
  

   stone, 
  the 
  white 
  or 
  gray 
  Medina 
  and 
  the 
  variegated 
  (red 
  and 
  

   white) 
  or 
  spotted. 
  The 
  quarries 
  in 
  this 
  district 
  are 
  worked 
  on 
  

   an 
  extensive 
  scale, 
  and 
  their 
  equipment 
  is 
  adequate 
  to 
  a 
  large 
  

   annual 
  production. 
  The 
  aggregate 
  output 
  is 
  larger 
  and 
  more 
  

   valuable 
  in 
  dimension 
  stone 
  for 
  dressing 
  than 
  that 
  of 
  any 
  other 
  

   quarry 
  district 
  in 
  the 
  state. 
  Including 
  the 
  stone 
  for 
  street 
  work, 
  

   the 
  total 
  value 
  is 
  greater 
  than 
  that 
  obtained 
  from 
  the 
  stone 
  of 
  

   any 
  other 
  geological 
  formation 
  in 
  the 
  state. 
  The 
  stone 
  has 
  

   gained 
  a 
  well-deserved 
  reputation 
  for 
  its 
  value 
  as 
  a 
  beautiful 
  

   and 
  durable 
  building 
  material 
  ; 
  and 
  its 
  more 
  general 
  employment^ 
  

   both 
  in 
  construction 
  and 
  in 
  paving, 
  is 
  much 
  to 
  be 
  desired. 
  The 
  

   extent 
  of 
  the 
  outcrops 
  offers 
  additional 
  sites 
  for 
  quarrying 
  opera- 
  

   tions, 
  and 
  the 
  greater 
  use 
  of 
  this 
  stone, 
  and 
  the 
  increase 
  of 
  the 
  

   producing 
  capacity 
  of 
  the 
  district 
  are 
  here 
  suggested. 
  

  

  Clinton 
  group 
  

  

  The 
  rocks 
  of 
  this 
  group 
  are 
  shales, 
  thin 
  beds 
  of 
  limestone 
  and 
  

   shaly 
  sandstones. 
  They 
  crop 
  out 
  in 
  a 
  narrow 
  belt 
  from 
  Herkimer 
  

   county 
  west 
  to 
  the 
  Niagara 
  river 
  and 
  bordering 
  the 
  Medina 
  sand- 
  

   stone 
  on 
  the 
  south. 
  Sandstone 
  for 
  building 
  has 
  been 
  quarried 
  

   in 
  the 
  southern 
  part 
  of 
  Herkimer 
  county; 
  at 
  Clinton, 
  near 
  Vernon 
  

  

  