﻿564 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  deposits 
  in 
  the 
  Hudson 
  valley, 
  and 
  from 
  this 
  work 
  the 
  followicg 
  

   observations 
  are 
  taken 
  : 
  

  

  From 
  Glasco 
  to 
  Kondout 
  the 
  terrace, 
  which 
  is 
  perhaps 
  one- 
  

   eighth 
  of 
  a 
  mile 
  broad 
  at 
  Glasco, 
  narrows 
  as 
  it 
  nears 
  Eondout 
  

   and 
  has 
  an 
  average 
  height 
  of 
  150 
  feet. 
  The 
  clays, 
  so 
  far 
  as 
  

   could 
  be 
  ascertained, 
  lie 
  on 
  the 
  upturned 
  edges 
  of 
  the 
  shale. 
  In 
  

   the 
  Yan 
  Dusen 
  yard 
  at 
  Glasco 
  the 
  clay 
  is 
  in 
  places 
  " 
  as 
  much 
  as 
  

   seventy 
  feet 
  thick 
  and 
  is 
  mostly 
  blue, 
  with 
  several 
  feet 
  of 
  loams 
  

   on 
  top." 
  The 
  clay 
  lies 
  on 
  a 
  ridge 
  of 
  shale 
  which 
  rises 
  steeply 
  

   from 
  the 
  shore 
  for 
  some 
  sixty 
  feet. 
  a 
  At 
  the 
  Washburn 
  yards 
  

   the 
  blue 
  clay 
  has 
  a 
  thickness 
  of 
  132 
  feet, 
  with 
  four 
  feet 
  of 
  yellow 
  

   clay 
  and 
  six 
  to 
  eight 
  feet 
  of 
  fine 
  sand 
  above. 
  It 
  lies 
  on 
  shale 
  at 
  

   an 
  altitude 
  of 
  eight 
  feet 
  above 
  the 
  river." 
  At 
  the 
  rear 
  of 
  A. 
  S. 
  

   Staple's 
  yard 
  (two 
  miles 
  north 
  of 
  Rondout) 
  there 
  is 
  an 
  exposure 
  

   of 
  li 
  hardpan 
  " 
  underlying 
  the 
  clay. 
  The 
  overlying 
  material 
  at 
  

   this 
  locality 
  consists 
  of 
  sand 
  and 
  gravel, 
  in 
  some 
  cases 
  stratified 
  

   and 
  sometimes 
  cross-bedded. 
  The 
  sand 
  in 
  some 
  spots 
  is 
  ten 
  to 
  

   fifteen 
  feet 
  thick 
  and 
  fine 
  enough 
  to 
  be 
  blown 
  by 
  the 
  wind. 
  At 
  

   Hutton's 
  yard 
  (near 
  by) 
  the 
  blue 
  clay 
  is 
  exposed 
  from 
  eight 
  feet 
  

   above 
  tide 
  to 
  110 
  feet; 
  above 
  this 
  there 
  is 
  about 
  ten 
  feet 
  of 
  

   yellow 
  and 
  over 
  this 
  about 
  fifteen 
  feet 
  of 
  sand. 
  

  

  At 
  Port 
  Ewen 
  the 
  clay 
  is 
  mostly 
  blue, 
  resting 
  on 
  a 
  mass 
  of 
  

   hardpan 
  and 
  in 
  a 
  few 
  places 
  on 
  the 
  glaciated 
  rock 
  surface. 
  The 
  

   clay 
  seems 
  to 
  lie 
  as 
  a 
  deposit 
  eighteen 
  to 
  twenty 
  feet 
  thick 
  on 
  

   the 
  hardpan 
  and 
  is 
  in 
  turn 
  overlaid 
  in 
  many 
  places 
  by 
  fine 
  strat- 
  

   ified 
  sand. 
  A 
  point 
  worthy 
  of 
  notice 
  is 
  the 
  difference 
  in 
  level 
  of 
  

   fifty 
  feet 
  between 
  the 
  terrace 
  at 
  Port 
  Ewen 
  and 
  that 
  at 
  Glasco. 
  

   This 
  may 
  be 
  due 
  to 
  the 
  fact 
  that 
  when 
  sediment 
  is 
  deposited 
  in 
  

   a 
  basin 
  its 
  upper 
  surface 
  will 
  be 
  higher 
  at 
  the 
  edge 
  of 
  the 
  basin 
  

   than 
  in 
  the 
  center. 
  The 
  quaternary 
  formation 
  broadens 
  out 
  at 
  

   Port 
  Ewen 
  toward 
  the 
  west 
  and 
  Port 
  Ewen 
  would 
  be 
  on 
  a 
  point 
  

   of 
  the 
  basin's 
  edge, 
  while 
  Glasco 
  is 
  near 
  the 
  center. 
  At 
  Port 
  

   Ewen 
  the 
  terrace 
  is 
  207 
  feet 
  above 
  the 
  river, 
  but 
  it 
  must 
  be 
  fully 
  

   225 
  feet 
  at 
  the 
  base 
  of 
  Hussey 
  mountain, 
  which 
  was 
  probably 
  an 
  

   island 
  in 
  the 
  estuary. 
  

  

  The 
  thicknes- 
  of 
  the 
  clay 
  between 
  Glasco 
  and 
  Rondout 
  varies 
  

   considerably, 
  amounting 
  to 
  120 
  feet 
  in 
  places, 
  and 
  in 
  others 
  not 
  

   over 
  twenty 
  feet. 
  This 
  is 
  owing 
  to 
  the 
  great 
  irregularity 
  of 
  the 
  

   underlying 
  rock 
  surface. 
  

  

  