﻿Plate 
  3 
  

  

  J. 
  Miller, 
  photo 
  

  

  View 
  showing 
  contact 
  between 
  Grenville 
  limestone 
  and 
  granitic 
  syenite 
  

   as 
  seen 
  from 
  across 
  the 
  Hudson 
  river 
  one-fourth 
  of 
  a 
  mile 
  north 
  of 
  the 
  

   ferry 
  (southwest 
  of 
  Moon 
  mountain). 
  The 
  smooth 
  ledge 
  at 
  the 
  river's 
  edge 
  

   on 
  the 
  left 
  and 
  another 
  toward 
  the 
  upper 
  right 
  hand 
  corner 
  are 
  parts 
  of 
  

   a 
  single 
  mass 
  of 
  syenite 
  mostly 
  concealed 
  by 
  the 
  trees. 
  The 
  other 
  rock 
  is 
  

   Grenville 
  limestone 
  (white) 
  with 
  numerous 
  closely 
  involved 
  streaks 
  and 
  

   bands 
  of 
  hornblende 
  (dark) 
  gneiss. 
  The 
  sharp 
  contact 
  between 
  the 
  syenite 
  

   and 
  Grenville 
  is 
  not 
  well 
  brought 
  out 
  in 
  the 
  picture. 
  

  

  