﻿CLAYS 
  OF 
  KEW 
  YORK 
  581 
  

  

  We 
  now 
  come 
  to 
  a 
  narrow 
  portion 
  of 
  the 
  river 
  from 
  Staatsbiirg 
  

   to 
  ISTew 
  Hamburg, 
  Avhere 
  the 
  terrace 
  if 
  present 
  is 
  of 
  small 
  extent, 
  

   and 
  presuniablv 
  underlain 
  by 
  drift 
  material. 
  

  

  Where 
  the 
  river 
  broadens 
  ont 
  again 
  at 
  Roeeton, 
  at 
  the 
  head 
  of 
  

   ^ewburgh 
  bay, 
  there 
  is 
  a 
  thick 
  bed 
  of 
  clay. 
  It 
  is 
  nearly 
  all 
  blue 
  

   and 
  underlies 
  the 
  remnant 
  of 
  a 
  terrace 
  120 
  feet 
  high, 
  which 
  has 
  

   escaped 
  entire 
  destruction 
  owing 
  to 
  its 
  position 
  in 
  a 
  reentrant 
  

   angle 
  of 
  the 
  upper 
  Cambrian 
  limestone 
  ridge 
  along 
  the 
  river 
  at 
  

   this 
  point. 
  The 
  overlying 
  stratified 
  sand 
  and 
  gravel 
  is 
  10 
  to 
  15 
  

   feet 
  thick. 
  At 
  Jova's 
  upper 
  yard 
  the 
  clay 
  rests 
  on 
  the 
  glaciated 
  

   limestone, 
  rver 
  whose 
  surface 
  are 
  scattered 
  several 
  boulders 
  of 
  

   the 
  same 
  rock. 
  The 
  clay 
  at 
  Rose's 
  yard 
  is 
  180 
  feet 
  thick, 
  while 
  

   that 
  at 
  Jova's 
  has 
  a 
  total 
  thickness 
  of 
  240 
  feet. 
  A 
  boring 
  of 
  135 
  

   feet 
  made 
  at 
  Rose's 
  yard 
  at 
  river 
  level 
  is 
  of 
  interest 
  in 
  connec- 
  

   tion 
  with 
  the 
  depth 
  of 
  the 
  preglacial 
  channel 
  of 
  the 
  Hudson. 
  

  

  Borings 
  recently 
  made 
  indicate 
  that 
  most 
  of 
  the 
  135 
  feet 
  is 
  sandy 
  

   blue 
  clay.^ 
  

  

  About 
  800 
  feet 
  south 
  of 
  Roseton 
  station 
  the 
  material 
  under 
  the 
  

   terrace 
  is 
  a 
  yellowish 
  loamy 
  clay, 
  thinly 
  stratified. 
  This 
  may 
  be 
  

   a 
  portion 
  of 
  the 
  secondary 
  cone 
  of 
  the 
  delta 
  of 
  Wappinger's 
  creek 
  

   at 
  Kew 
  Hamburg. 
  ]^orth 
  of 
  this 
  a 
  cutting 
  has 
  been 
  made 
  in 
  the 
  

   terrace 
  escarpment, 
  the 
  section 
  exposed 
  showing 
  alternating 
  layers 
  

   of 
  yellow 
  and 
  black 
  sand. 
  

  

  From 
  Newburgh 
  to 
  l^ew 
  Windsor 
  the 
  clay 
  is 
  overlain 
  by 
  the 
  ex- 
  

   tensive 
  delta 
  deposits 
  of 
  Quaseaic 
  creek 
  and 
  Moodna 
  river. 
  To 
  the 
  

   east 
  of 
  Mrs 
  T. 
  Christie's 
  yard 
  the 
  clay, 
  which 
  is 
  mostly 
  blue 
  and 
  

   thin 
  layered, 
  is 
  overlaid 
  by 
  fine 
  gravel 
  and 
  sand 
  obscurely 
  cross- 
  

   stratified 
  in 
  places. 
  Over 
  this 
  is 
  3 
  to 
  4 
  feet 
  of 
  sandy 
  soil. 
  The 
  

   upper 
  layers 
  of 
  the 
  clay 
  are 
  wrinkled 
  in 
  places, 
  probably 
  owing 
  

   to 
  the 
  oblique 
  downward 
  pressure 
  of 
  the 
  overlying 
  delta 
  deposits. 
  

   It 
  seems 
  likely 
  that 
  at 
  this 
  spot 
  only 
  a 
  small 
  portion 
  of 
  them 
  re- 
  

   mains, 
  muych 
  having 
  probably 
  been 
  eroded. 
  At 
  Lang's 
  yard, 
  south 
  

   of 
  Christie's, 
  there 
  is 
  4 
  to 
  6 
  feet 
  of 
  sand 
  and 
  gi-avel 
  over 
  the 
  clay, 
  

  

  1 
  T. 
  A. 
  T. 
  M. 
  E. 
  1S99. 
  29: 
  7G. 
  

  

  