﻿Plate 
  8 
  

  

  Contact 
  of 
  the 
  Potsdam 
  sandstone 
  on 
  Granville 
  quartzite 
  by 
  roadside 
  

   I 
  mile 
  southeast 
  of 
  Redwood, 
  looking 
  west. 
  The 
  quartzite 
  is 
  somewhat 
  

   contorted 
  but 
  its 
  dips 
  are 
  not 
  steep, 
  from 
  20-30°. 
  The 
  upper 
  view 
  is 
  from 
  

   15 
  feet 
  distance, 
  the 
  lower 
  with 
  the 
  camera 
  only 
  4 
  feet 
  away 
  and 
  showing 
  

   only 
  the 
  lower 
  layer 
  of 
  the 
  Potsdam 
  clearly. 
  H. 
  N. 
  Eaton, 
  photo, 
  1908 
  

  

  