﻿20 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  of 
  the 
  Adirondacks 
  on 
  the 
  north 
  and 
  the 
  comparatively 
  hard 
  lime- 
  

   stones 
  immediately 
  southward. 
  The 
  work 
  of 
  erosion 
  has 
  made 
  

   rapid 
  progress 
  in 
  this 
  belt 
  of 
  weak 
  rocks, 
  and 
  at 
  two 
  places, 
  Little 
  

  

  i^Pnr 
  

  

  irr^xrrnrn 
  

  

  • 
  V 
  V 
  • 
  

  

  v 
  ^ 
  

  

  >/ 
  is 
  v 
  

  

  V 
  V 
  • 
  

  

  Sea- 
  level 
  

  

  "V 
  V 
  i/ 
  ^ 
  V 
  ' 
  ? 
  "" 
  

  

  ^ 
  

  

  

  

  * 
  \s 
  s/ 
  1/ 
  ^ 
  V 
  

  

  N 
  <a 
  -l 
  t 
  -l 
  i 
  J- 
  

  

  =JD 
  

  

  Fig. 
  7 
  Geologic 
  and 
  topographic 
  sketch 
  map 
  and 
  structure 
  sections 
  of 
  the 
  

   vicinity 
  of 
  Little 
  Falls. 
  Crosslined 
  area 
  at 
  bottom 
  of 
  gorge 
  = 
  Precambric 
  

   rock 
  (syenite); 
  blank 
  areas 
  = 
  Little 
  Falls 
  (Cambric) 
  dolomite; 
  vertical 
  

   line 
  areas 
  = 
  Trenton 
  (Ordovicic) 
  limestone 
  and 
  shale; 
  horizontal 
  lined 
  

   areas 
  = 
  Utica 
  (Ordovicic) 
  shale; 
  dotted 
  areas 
  = 
  Quaternary 
  sand 
  and 
  

   gravel. 
  Heavy 
  black 
  lines 
  are 
  faults. 
  The 
  structure 
  sections 
  show 
  the 
  con- 
  

   dition 
  of 
  things 
  along 
  the 
  lines 
  AB 
  and 
  CD. 
  In 
  the 
  sections 
  the 
  vertical 
  scale 
  

   is 
  four 
  times 
  exaggerated. 
  

  

  Based 
  upon 
  map 
  by 
  H. 
  P. 
  Cushing 
  

  

  