﻿502 
  Forty-seventh 
  Report 
  ojs 
  the 
  State 
  Museum. 
  

  

  The 
  quartzite 
  is 
  in 
  very 
  regular 
  beds 
  having 
  a 
  thickness 
  from 
  

   three 
  to 
  twelve 
  inches 
  which 
  are 
  in 
  greater 
  part 
  welded 
  together. 
  

   The 
  predominating 
  color 
  is 
  light-gray 
  with 
  buff-brown 
  streaks 
  ; 
  

   many 
  of 
  the 
  beds 
  having 
  a 
  characteristic 
  cross-bedding 
  within 
  

   themselves 
  brought 
  out 
  by 
  slight 
  differences 
  in 
  tints. 
  The 
  lower 
  

   cement 
  bed 
  lies 
  directly 
  on 
  the 
  surface 
  of 
  this 
  quartzite, 
  but 
  is 
  

   sharply 
  separated 
  by 
  dissimilarity 
  of 
  materials 
  without 
  beds 
  of 
  

   passage. 
  The 
  shales 
  underlying 
  the 
  quartzite 
  are 
  in 
  greater 
  part 
  

   dull-red 
  in 
  color, 
  moderately 
  fine-grained, 
  and 
  massively 
  bedded 
  

   as 
  a 
  whole, 
  but 
  they 
  readily 
  break 
  into 
  shale 
  on 
  exposure. 
  They 
  

   are 
  quite 
  sharply 
  separated 
  from 
  the 
  quartzite. 
  

  

  The 
  shales 
  and 
  quartzites 
  are 
  extensively 
  exposed 
  in 
  the 
  cement 
  

   quarries 
  along 
  the 
  anticlinal 
  of 
  the 
  Eosendale-Whiteport 
  belt 
  

   and 
  the 
  eastern 
  edge 
  of 
  the 
  synclinal 
  eastward. 
  The 
  two 
  

   members 
  preserve 
  their 
  distinctive 
  characters 
  to 
  some 
  distance 
  

   south 
  of 
  Eosendale, 
  where 
  the 
  quartzite 
  gives 
  place 
  to 
  argilla- 
  

   ceous 
  and 
  calcareous 
  sediments 
  finely 
  exposed 
  in 
  the 
  north 
  

   bank 
  of 
  the 
  Eondout, 
  at 
  High 
  Falls. 
  In 
  this 
  region 
  the 
  

   red 
  of 
  the 
  lower 
  shales 
  increases 
  to 
  a 
  bright 
  tint, 
  which 
  

   is 
  strikingly 
  exhibited 
  in 
  the 
  High 
  Falls 
  exposure. 
  There 
  are 
  

   also 
  outcrops 
  of 
  these 
  red 
  beds 
  on 
  the 
  Coxingkill, 
  two 
  miles 
  south- 
  

   southeast 
  of 
  High 
  Falls, 
  and 
  on 
  the 
  point 
  of 
  an 
  anticlinal 
  near 
  

   Stony 
  creek, 
  a 
  mile 
  southeast 
  of 
  Port 
  Jackson. 
  Exposures 
  of 
  the 
  

   members 
  are 
  rare 
  in 
  Wawarsing 
  township, 
  but 
  at 
  several 
  points 
  

   south 
  of 
  Ellenville 
  there 
  are 
  a 
  few 
  small 
  showings 
  of 
  red 
  and 
  

   brown 
  shales 
  along 
  the 
  western 
  base 
  of 
  the 
  Shawangunk 
  mountain. 
  

  

  The 
  evidence 
  as 
  to 
  the 
  precise 
  equivalency 
  of 
  these 
  beds 
  

   between 
  the 
  Shawangunk 
  grit 
  and 
  Salina 
  formation, 
  in 
  Ulster 
  

   county, 
  is 
  unsatisfactory. 
  No 
  fossils 
  have 
  been 
  found 
  and 
  the 
  

   phjrsical 
  characters 
  are 
  not 
  wholy 
  distinctive. 
  The 
  quartzite 
  and 
  

   calcareous 
  upper 
  member 
  is 
  thought 
  to 
  represent 
  the 
  Clinton 
  

   formation, 
  for 
  the 
  upper 
  part 
  of 
  this 
  horizon 
  is 
  characterized 
  by 
  

   somewhat 
  similar 
  beds 
  in 
  western 
  New 
  York. 
  The 
  lower 
  red 
  

   beds 
  may 
  also 
  be 
  Clinton, 
  but 
  as 
  they 
  appear 
  to 
  expand 
  into 
  a 
  

   series 
  of 
  red 
  sandstones 
  southward, 
  it 
  is 
  suggested 
  that 
  they 
  are 
  

   of 
  Medina 
  age. 
  

  

  Shawangunk 
  grit. 
  — 
  This 
  formation 
  is 
  a 
  great 
  sheet 
  of 
  silicified 
  

   quartz 
  conglomerate 
  lying 
  on 
  the 
  Hudson 
  river 
  shales, 
  and 
  giving 
  

  

  