﻿588 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  The 
  clay 
  deposits 
  of 
  Hudson, 
  Stockport 
  and 
  Stujvesant 
  are 
  

   like 
  those 
  at 
  Coeymans 
  Landing, 
  being 
  overlain 
  in 
  most 
  places 
  

   by 
  a 
  few 
  feet 
  of 
  loam 
  and 
  underlain 
  by 
  dark 
  sand 
  and 
  gravel. 
  

   At 
  Stockport 
  two 
  ice-scratched 
  boulders 
  were 
  found 
  in 
  the 
  clay; 
  

   one 
  of 
  them 
  3 
  feet 
  in 
  diameter, 
  the 
  other 
  three 
  times 
  as 
  large. 
  

   To 
  the 
  north 
  of 
  Brousseau's 
  yard 
  at 
  Stuyvesant 
  the 
  surface 
  ma- 
  

   terial 
  is 
  stratified 
  sand, 
  15 
  feet 
  of 
  it 
  being 
  exposed 
  thus 
  far. 
  

  

  Eecently 
  a 
  number 
  of 
  borings 
  have 
  been 
  made 
  in 
  the 
  Hudson 
  

   river 
  clays 
  in 
  the 
  interest 
  of 
  a 
  syndicate, 
  . 
  and 
  these 
  corroborate 
  

   most 
  of 
  the 
  observations 
  already 
  published. 
  One 
  interesting 
  fact 
  

   brought 
  out 
  by 
  the 
  sections 
  is 
  the 
  abruptness 
  of 
  the 
  face 
  of 
  the 
  rock 
  

   underlying 
  the 
  clays. 
  The 
  borings 
  in 
  no 
  case 
  attempted 
  to 
  go 
  to 
  

   the 
  bottom 
  of 
  the 
  deposit, 
  but 
  stopped 
  when 
  the 
  sandy 
  beds 
  of 
  clay, 
  

   that 
  seem 
  to 
  constitute 
  a 
  lower 
  member 
  of 
  the 
  deposit, 
  were 
  en- 
  

   countered. 
  C 
  Economic 
  geology 
  of 
  the 
  Hudson 
  river 
  clays," 
  

   C. 
  C. 
  Jones, 
  Trans. 
  Amer. 
  inst. 
  min. 
  eng._, 
  Feb. 
  1899) 
  

  

  The 
  delta 
  deposits 
  of 
  the 
  streams 
  tributary 
  to 
  the 
  Hudson 
  river 
  

   are 
  extremely 
  interesting. 
  They 
  give 
  us 
  an 
  idea 
  of 
  the 
  size 
  of 
  

   the 
  rivers 
  flowing 
  into 
  the 
  Hudson 
  valley 
  when 
  it 
  formed 
  an 
  

   estuary, 
  and 
  also 
  indicate 
  the 
  amount 
  of 
  depression 
  which 
  took 
  

   place 
  at 
  those 
  localities. 
  All 
  three 
  portions 
  of 
  a 
  delta 
  may 
  be 
  

   observed 
  in 
  the 
  ancient 
  deltas 
  on 
  the 
  Hudson; 
  they 
  are 
  the 
  thii^ 
  

   layers 
  of 
  loamy 
  clay 
  which 
  form 
  the 
  secondary 
  alluvial 
  cone 
  of 
  

   the 
  delta, 
  the 
  cross-stratified 
  sand 
  and 
  gravel 
  and 
  the 
  overlying 
  

   unassorted 
  material. 
  This 
  was 
  observed 
  at 
  Haverstraw, 
  'New 
  

   Windsor, 
  Low 
  point 
  and 
  Dutchess 
  Junction. 
  

  

  The 
  following 
  streams 
  between 
  JSTew 
  York 
  and 
  Poughkeepsie 
  

   have 
  formed 
  delta 
  deposits; 
  (as 
  noted 
  by 
  Dr 
  Frederick 
  J. 
  H. 
  Mer- 
  

   rill.-^) 
  "Wappinger 
  creek, 
  New 
  Hamburg; 
  Fishkill 
  creek; 
  Indian 
  

   creek, 
  Coldspring; 
  Peekskill; 
  Croton 
  river; 
  Pocantico 
  river. 
  Tarry- 
  

   town; 
  Sawmill 
  river, 
  Yonkers; 
  Tibbitt^s 
  brook. 
  Van 
  Cortland; 
  

   Minisceongo 
  creek, 
  Haverstraw; 
  Cedar 
  pond 
  brook, 
  Haverstraw; 
  

   Moodna 
  river, 
  Cornwall; 
  and 
  Quassaic 
  creek, 
  E'ewburgh. 
  At 
  the 
  

  

  1 
  Amer. 
  jour. 
  set. 
  June 
  1891. 
  3: 
  41. 
  

  

  