﻿Plate 
  17 
  

  

  1 
  he 
  upper 
  view 
  is 
  of 
  Potash 
  mountain, 
  locally 
  called 
  the 
  " 
  Potash 
  Kettle," 
  

   three 
  miles 
  north 
  of 
  Luzerne, 
  Warren 
  county. 
  It 
  is 
  a 
  remarkable 
  feature 
  

   of 
  the 
  landscape, 
  the 
  almost 
  isolated 
  mountain 
  towering 
  1100 
  feet 
  above 
  the 
  

   surrounding 
  valleys. 
  The 
  rock 
  is 
  Precambric 
  granite. 
  

  

  The 
  lower 
  view 
  shows 
  several 
  dark 
  lava 
  (diabase) 
  dikes 
  cutting 
  gray 
  

   syenite 
  three-fourths 
  of 
  a 
  mile 
  northwest 
  of 
  Northville, 
  Fulton 
  county. 
  

   Both 
  rocks 
  are 
  of 
  Precambric 
  age. 
  Photos 
  by 
  W. 
  J. 
  Miller 
  

  

  