﻿N. 
  Y. 
  STATE 
  MUSEUM 
  BULLETIN 
  168 
  

  

  PLATE 
  10 
  

  

  _ 
  _ 
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  / 
  

  

  H 
  K 
  I 
  L 
  L 
  

  

  A 
  portion 
  of 
  the 
  West 
  Point 
  (U. 
  S. 
  G. 
  S.) 
  contour 
  map, 
  illustrating 
  the 
  

   topography 
  of 
  the 
  Highlands 
  of 
  the 
  Hudson. 
  The 
  river 
  here 
  flows 
  through 
  

   a 
  deep, 
  narrow 
  gorge 
  which 
  has 
  been 
  cut 
  through 
  the 
  northeast-southwest 
  

   ridges 
  of 
  very 
  hard 
  Precambric 
  rock. 
  The 
  sides 
  of 
  the 
  gorge 
  rise 
  abruptly 
  

   from 
  the 
  river 
  to 
  heights 
  of 
  1200 
  or 
  1400 
  feet, 
  while 
  the 
  rock 
  bottom 
  of 
  the 
  

   gorge 
  is 
  hundreds 
  of 
  feet 
  below 
  the 
  river 
  level. 
  Scale, 
  about 
  1 
  mile 
  to 
  

   the 
  inch. 
  

  

  