﻿478 
  NEW 
  YORK 
  STATE 
  1 
  MUSEUM 
  

  

  eighth 
  of 
  a 
  mile, 
  apparently 
  cutting 
  out 
  all 
  of 
  the 
  fine 
  grained 
  

   gneiss 
  together 
  with 
  much 
  limestone, 
  but 
  lack 
  of 
  outcrops 
  again 
  

   prevents 
  a 
  positive 
  conclusion. 
  Beyond 
  this 
  point 
  the 
  boundary 
  

   of 
  the 
  syenite 
  is 
  vague 
  and 
  no 
  structural 
  data 
  of 
  importance 
  are 
  

   shown 
  within 
  the 
  limits 
  of 
  this 
  season's 
  work. 
  

  

  East 
  of 
  Harrisville 
  and 
  about 
  a 
  mile 
  south 
  of 
  Pitcairn 
  forks, 
  

   near 
  the 
  road 
  leading 
  to 
  Goose 
  pond 
  the 
  syenite 
  boundary 
  is 
  

   again 
  shown 
  and 
  while 
  the 
  actual 
  contacts 
  are 
  covered 
  the 
  break 
  

   in 
  outcrops 
  is 
  only 
  a 
  few 
  feet 
  and 
  does 
  not 
  suffice 
  to 
  hide 
  some 
  

   important 
  facts. 
  The 
  syenite 
  appears 
  a 
  few 
  feet 
  south 
  of 
  a 
  good 
  

   outcrop 
  of 
  limestone 
  and 
  again 
  just 
  north 
  of 
  the 
  latter. 
  The 
  

   limestone 
  is 
  filled 
  with 
  coccolitic 
  bands 
  and 
  irregular 
  masses 
  of 
  

   feldspar 
  of 
  peculiar 
  green 
  and 
  purple 
  tints. 
  The 
  whole 
  aspect 
  

   of 
  this 
  small 
  outcrop 
  of 
  limestone 
  suggests 
  that 
  it 
  has 
  been 
  much 
  

   altered 
  by 
  contact 
  with 
  metamorphism 
  and 
  it 
  resembles 
  closely 
  

   some 
  of 
  the 
  typical 
  contact 
  zones 
  of 
  the 
  region. 
  The 
  limestone 
  of 
  

   the 
  main 
  mass 
  a 
  few 
  rods 
  to 
  the 
  north 
  is 
  on 
  the 
  other 
  hand 
  of 
  

   the 
  normal 
  character. 
  

  

  The 
  writer 
  would 
  interpret 
  this 
  locality 
  as 
  another 
  intrusive 
  

   contact, 
  the 
  small 
  area 
  of 
  impure 
  limestone 
  being 
  an 
  inclusion 
  

   caught 
  in 
  the 
  syenite. 
  But 
  from 
  the 
  description 
  given 
  it 
  is 
  evi- 
  

   dent 
  that 
  the 
  data 
  are 
  far 
  from 
  conclusive 
  and 
  are 
  capable 
  of 
  

   totally 
  different 
  explanations. 
  It 
  is 
  only 
  when 
  taken 
  in 
  connec- 
  

   tion 
  with 
  other 
  localities 
  that 
  this 
  one 
  has 
  a 
  value 
  chiefly 
  con- 
  

   firmatory. 
  

  

  On 
  making 
  a 
  comparison 
  with 
  the 
  phenomena 
  shown 
  near 
  the 
  

   station 
  one 
  important 
  point 
  is 
  brought 
  out. 
  At 
  the 
  latter 
  locality 
  

   the 
  syenite 
  is 
  generally 
  in 
  contact 
  with 
  a 
  narrow 
  band 
  of 
  gray 
  

   gneiss, 
  north 
  of 
  which 
  limestone 
  extends 
  for 
  a 
  mile 
  or 
  there- 
  

   abouts 
  across 
  the 
  strike. 
  At 
  the 
  locality 
  just 
  described 
  on 
  the 
  

   other 
  hand 
  the 
  syenite 
  is 
  in 
  contact 
  with 
  the 
  limestone 
  itself, 
  and 
  

   continuing 
  northward 
  there 
  is 
  a 
  series 
  of 
  alternating 
  limestones 
  

   and 
  fine 
  gneisses 
  quite 
  different 
  from 
  that 
  at 
  the 
  other 
  locality. 
  

   This 
  appears 
  in 
  the 
  following 
  figure 
  of 
  a 
  roughly 
  made 
  section 
  

   about 
  a 
  half 
  mile 
  in 
  length. 
  Thus 
  it 
  is 
  evident 
  that 
  the 
  syenite 
  

   is 
  in 
  contact 
  with 
  different 
  parts 
  of 
  the 
  limestone 
  formation 
  in 
  

  

  