﻿518 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  trip 
  made 
  alone 
  by 
  him, 
  while 
  the 
  writer 
  was 
  working 
  in 
  White- 
  

   hall. 
  The 
  specimen 
  81, 
  was 
  lost 
  in 
  packing 
  and 
  the 
  determi- 
  

   nation 
  has 
  therefore 
  not 
  been 
  verified 
  by 
  the 
  microscope, 
  but 
  on 
  

   the 
  strength 
  of 
  the 
  field-notes 
  the 
  area 
  is 
  given 
  a 
  special 
  sign. 
  

   Still 
  rocks 
  were 
  gathered 
  in 
  Whitehall, 
  in 
  the 
  conviction 
  in 
  the 
  

   field 
  that 
  they 
  were 
  quartzites, 
  which 
  microscopic 
  study 
  leads 
  us 
  

   to 
  think 
  are 
  dynamically 
  crushed 
  eruptives 
  and 
  the 
  determina- 
  

   tion 
  above 
  recorded 
  for 
  no. 
  81 
  is 
  made 
  with 
  reservations. 
  It 
  is, 
  

   however, 
  impossible 
  to 
  visit 
  the 
  locality 
  again 
  before 
  submitting 
  

   this 
  report. 
  The 
  writers 
  appreciate 
  that 
  in 
  this 
  southeastern 
  

   corner 
  of 
  the 
  Adirondack 
  crystallines 
  they 
  are 
  approaching 
  the 
  

   metamorphic 
  areas 
  of 
  northwestern 
  Massachusetts 
  and 
  southern 
  

   Vermont, 
  and 
  that 
  in 
  this 
  portion 
  homotaxial 
  rocks 
  might 
  be 
  an- 
  

   ticipated 
  if 
  anywhere. 
  But 
  none 
  have 
  been 
  yet 
  definitely 
  observed 
  

   which 
  enable 
  us 
  to 
  trace 
  any 
  parallelism. 
  

  

  Series 
  4. 
  Both 
  the 
  Potsdam 
  sandstone 
  and 
  the 
  Calciferous 
  

   limestone 
  are 
  represented 
  by 
  very 
  small 
  exposures. 
  The 
  Pots- 
  

   dam 
  was 
  found 
  in 
  two 
  small 
  outliers 
  well 
  up 
  within 
  the 
  hills. 
  

   The 
  more 
  northerly 
  lies 
  about 
  a 
  mile 
  and 
  a 
  half 
  west 
  of 
  Snody 
  

   dock. 
  The 
  sandstone 
  is 
  found 
  on 
  a 
  steep 
  hillside 
  resting 
  upon 
  

   gneisses, 
  and 
  is 
  only 
  a 
  foot 
  or 
  two 
  thick 
  and 
  a 
  few 
  square 
  feet 
  

   in 
  area. 
  The 
  locality 
  is 
  just 
  below 
  the 
  outlet 
  of 
  Long 
  pond, 
  and 
  

   on 
  the 
  roadside 
  between 
  the 
  house 
  and 
  barn 
  of 
  a 
  farm 
  that 
  is 
  

   situated 
  at 
  this 
  point. 
  The 
  strike 
  is 
  N 
  20 
  E, 
  and 
  the 
  dip 
  10 
  

   E. 
  The 
  sandstone 
  is 
  ripple-marked 
  and 
  the 
  ripples 
  bear 
  N 
  20 
  

   W. 
  -The 
  waves 
  that 
  made 
  the 
  ripples 
  on 
  this 
  sandy 
  bottom 
  must 
  

   have 
  come 
  either 
  from 
  a 
  direction 
  south 
  of 
  west 
  or 
  from 
  one 
  

   north 
  of 
  east. 
  „ 
  This 
  sandstone 
  is 
  now 
  on 
  the 
  900 
  foot 
  contour 
  and 
  

   is 
  one 
  of 
  the 
  most 
  elevated 
  exposures 
  of 
  the 
  Potsdam 
  that 
  we 
  

   have 
  observed. 
  

  

  The 
  small 
  area 
  in 
  the 
  Pike 
  brook 
  valley 
  is 
  larger 
  and 
  the 
  beds 
  

   are 
  seen 
  in 
  several 
  places, 
  but 
  they 
  are 
  of 
  no 
  great 
  thickness. 
  

   The 
  strike 
  is 
  slightly 
  different 
  from 
  the 
  last, 
  being 
  N 
  10 
  W 
  with 
  

   a 
  dip 
  of 
  15 
  E. 
  The 
  ripple 
  marks 
  bear 
  N. 
  and 
  S. 
  In 
  the 
  sections 
  

   EE 
  and 
  FF 
  of 
  map, 
  plate 
  2, 
  the 
  bedding 
  as 
  drawn 
  in 
  the 
  con- 
  

  

  