﻿PLEISTOCENE 
  GEOLOGY 
  OF 
  NASSAU 
  CO. 
  AND 
  BOROUGH 
  OF 
  QUEENS 
  029 
  

  

  A 
  small 
  exposure 
  of 
  a 
  bed 
  of 
  till 
  also 
  existed 
  in 
  the 
  summer 
  oi 
  

   1900 
  near 
  Rocky 
  point 
  at 
  the 
  northwestern 
  extremity 
  of 
  the 
  so-called 
  

   Center 
  island 
  in 
  Oyster 
  bay. 
  The 
  annexed 
  sketches 
  illustrate 
  the 
  

   varying 
  conditions 
  seen 
  at 
  this 
  

   locality. 
  In 
  fig. 
  3 
  the 
  beds 
  in 
  

   the 
  bluff 
  west 
  of 
  Rocky 
  point 
  

   show 
  again 
  the 
  transition 
  from 
  

   till 
  to 
  stratified 
  beds. 
  A 
  detail 
  

   of 
  the 
  western 
  part 
  of 
  the 
  sec- 
  

   tion 
  is 
  given 
  in 
  fig. 
  4, 
  showing 
  

   loesslike 
  sands 
  at 
  top, 
  inclosing 
  

   boulders, 
  beneath 
  which 
  comes 
  

   a 
  bed 
  of 
  gravelly 
  sand 
  from 
  6 
  

  

  to 
  10 
  feet 
  thick, 
  with 
  pockets 
  /4;^/^'\'/\-^\zfe) 
  

  

  of 
  clay. 
  A 
  gravelly 
  till 
  10 
  

   feet 
  thick 
  underlies 
  this 
  bed, 
  

   below 
  which 
  again 
  appear 
  ^^^r, 
  -I. 
  X- 
  \ 
  VA-^/ 
  A 
  ^- 
  ' 
  v>^^^/\\ 
  

  

  compound 
  gravels 
  and 
  sand. 
  pig. 
  2 
  southwestern 
  face 
  of 
  Barker 
  point. 
  

  

  Near 
  the 
  headland 
  underlying 
  ^' 
  cross-bedded 
  ferruginous 
  sands; 
  b, 
  the 
  tiu 
  

  

  . 
  bed 
  5 
  or 
  6 
  feet 
  thick, 
  resting 
  uncon 
  form 
  ably 
  

  

  blue 
  clays 
  rise 
  up 
  ni 
  a 
  knob, 
  on 
  the 
  sands, 
  and 
  overlaln 
  by 
  sands; 
  C, 
  sands; 
  

  

  with 
  sands 
  cut 
  off 
  on 
  the 
  east, 
  I>. 
  surface 
  till 
  and 
  boulders, 
  the 
  fine 
  materials 
  

  

  ^ 
  being 
  largely 
  rearranged 
  sands 
  

  

  the 
  whole 
  being 
  overlain 
  uncon- 
  

  

  formably 
  by 
  till 
  with 
  boulders 
  up 
  to 
  2 
  feet 
  in 
  diameter. 
  At 
  the 
  

   headland 
  on 
  the 
  southwest, 
  the 
  sections 
  shown 
  in 
  fig. 
  5 
  and 
  6 
  

   exhibit 
  an 
  earthy 
  gravel 
  (as 
  in 
  fig. 
  6) 
  evidently 
  a 
  phase 
  of 
  the 
  till 
  

   bed 
  or 
  the 
  till 
  as 
  in 
  fig. 
  5, 
  resting 
  unconformably 
  on 
  tilted 
  yellow 
  

   sands, 
  which 
  in 
  turn 
  repose 
  on 
  disturbed 
  clays. 
  

  

  Fig. 
  3 
  Section 
  along 
  the 
  bluff 
  west 
  of 
  Rocky 
  point, 
  a, 
  clay 
  exposure* 
  B, 
  till; 
  c, 
  sands 
  and 
  

   gravels; 
  d, 
  partially 
  buried 
  surface 
  boulders 
  

  

  Above 
  these 
  exposures 
  on 
  the 
  shore 
  the 
  ground 
  rises 
  on 
  the 
  eroded 
  

   and 
  till-covered 
  slopes 
  of 
  the 
  Columbia. 
  The 
  evidence 
  of 
  uncon- 
  

   formity 
  between 
  the 
  till 
  bed 
  and 
  the 
  underlying 
  disturbed 
  clays 
  and 
  

   sands 
  is 
  in 
  sharp 
  contrast 
  with 
  the 
  sections 
  on 
  Hempstead 
  bay 
  and 
  

  

  