﻿Plate 
  7 
  

  

  W. 
  J. 
  Miller, 
  photo 
  

  

  Photograph 
  of 
  a 
  hand 
  specimen 
  showing 
  the 
  contact 
  between 
  diabase 
  

   and 
  Grenville 
  limestone 
  from 
  the 
  Asbestos 
  mine 
  three-fourths 
  of 
  a 
  mile 
  

   southeast 
  of 
  Thurman 
  village. 
  Nearly 
  natural 
  size. 
  The 
  zones 
  numbered 
  

   on 
  the 
  left 
  side 
  correspond 
  to 
  those 
  described 
  on 
  page 
  43. 
  Zone 
  4 
  is 
  scarcely- 
  

   brought 
  out 
  in 
  the 
  picture 
  and 
  zone 
  3 
  is 
  best 
  shown 
  on 
  the 
  right 
  side. 
  

  

  