﻿492 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  rence, 
  but 
  they 
  exist 
  in 
  appreciable 
  proportion 
  in 
  nearly 
  every 
  

   bed. 
  

  

  It 
  is 
  not, 
  by 
  any 
  means, 
  the 
  highest 
  formation 
  in 
  the 
  Catskill 
  

   mountains, 
  and 
  is 
  probably 
  a 
  local 
  development. 
  This 
  forma- 
  

   tion, 
  and 
  the 
  underlying 
  members 
  to 
  the 
  base 
  of 
  the 
  Upper 
  Flag 
  

   series, 
  belong 
  to 
  the 
  Catskill 
  group 
  of 
  Mather 
  and 
  Yanuxem. 
  

  

  Red 
  conglomeratic 
  sandstones. 
  — 
  This 
  member 
  occupies 
  the 
  

   higher 
  portions 
  of 
  the 
  western 
  townships. 
  It 
  consists 
  of 
  coarse, 
  

   heavily-bedded 
  sandstones 
  of 
  dull 
  brownish 
  hue, 
  containing 
  dis 
  

   seminated 
  pebbles 
  and 
  conglomeratic 
  streaks 
  and 
  only 
  differs 
  

   from 
  the 
  overlying 
  white 
  conglomeratic 
  beds 
  in 
  its 
  color. 
  It 
  

   should 
  not 
  be 
  classed 
  as 
  a 
  conglomerate 
  for 
  the 
  reason 
  that 
  it 
  is 
  

   in 
  greater 
  part 
  composed 
  of 
  sand 
  grains. 
  The 
  pebbles 
  and 
  con- 
  

   glomeratic 
  portions 
  are 
  scattered 
  very 
  irregularly 
  through 
  the 
  

   series, 
  but 
  are 
  nearly 
  everywhere 
  more 
  or 
  less 
  conspicuous. 
  The 
  

   bedding 
  is 
  thinner 
  and 
  flaggy 
  at 
  some 
  portions, 
  and 
  there 
  is 
  

   much 
  coarser 
  cross 
  bedding. 
  Locally 
  there 
  are 
  included 
  masses 
  

   of 
  more 
  or 
  less 
  heavily 
  -bedded 
  gray 
  sandstone, 
  but 
  these 
  are 
  of 
  

   no 
  great 
  thickness, 
  and 
  are 
  not 
  conspicuous 
  features. 
  Several 
  

   thin 
  layers 
  of 
  red 
  shales 
  also 
  occur. 
  This 
  series 
  merges 
  into 
  the 
  

   underlying 
  Upper 
  Flag 
  series 
  by 
  a 
  short, 
  irregular 
  transition 
  which 
  

   may 
  vary 
  somewhat 
  in 
  horizon. 
  The 
  thickness 
  of 
  the 
  beds 
  in 
  

   Ulster 
  county 
  is 
  about 
  1375 
  feet 
  to 
  the 
  eastward 
  and 
  apparently 
  

   somewhat 
  more 
  to 
  the 
  westward. 
  The 
  formation 
  constitutes 
  the 
  

   higher 
  slope 
  of 
  the 
  Slide 
  mountain 
  ridge 
  and 
  all 
  of 
  the 
  higher 
  

   region 
  west 
  of 
  the 
  heads 
  of 
  Big 
  Indian 
  and 
  Neversink 
  creeks. 
  

  

  The 
  Upper 
  Flagstone 
  series. 
  — 
  This 
  formation 
  consists 
  of 
  a 
  thick- 
  

   ness 
  of 
  thin 
  and 
  thick-bedded 
  sandstones 
  with 
  intercalated 
  red 
  

   shales, 
  occupying 
  a 
  wide 
  area 
  in 
  the 
  middle 
  and 
  lower 
  portions 
  of 
  

   the 
  Catskill 
  mountains. 
  The 
  red 
  shale 
  intercalations 
  are 
  thickest 
  

   and 
  most 
  frequent 
  to 
  the 
  northwestward 
  and 
  in 
  the 
  lower 
  

   members. 
  Above 
  and 
  to 
  the 
  west 
  and 
  south 
  they 
  occur 
  less 
  

   frequently 
  and 
  in 
  thinner 
  beds. 
  The 
  sandstones 
  occur 
  in 
  series 
  

   from 
  20 
  to 
  200 
  feet 
  in 
  thickness, 
  which 
  give 
  rise 
  to 
  sharp 
  

   terraces 
  in 
  the 
  northern 
  slopes. 
  They 
  are 
  in 
  greater 
  part 
  

   light-gray 
  to 
  gray 
  -brown 
  in 
  color 
  and 
  from 
  two 
  to 
  six 
  

   inches 
  in 
  thickness. 
  Many 
  of 
  the 
  beds 
  are 
  suitable 
  for 
  flag- 
  

   ging 
  or 
  for 
  "bluestone," 
  and 
  these 
  are 
  worked 
  at 
  numerous 
  

  

  