﻿Plate 
  5 
  

  

  

  Fossil 
  fragments 
  from 
  the 
  red 
  flux 
  bed. 
  The 
  ore 
  

   is 
  largely 
  made 
  up 
  of 
  such 
  fragments 
  of 
  bryozoans 
  

   and 
  crinoid 
  stems 
  which 
  have 
  been 
  partially 
  or 
  wholly 
  

   replaced 
  by 
  hematite. 
  

  

  Plate 
  6 
  

  

  Oolitic 
  ore, 
  magnified 
  so 
  as 
  to 
  show 
  quartz 
  nuclei 
  and 
  

   concentric 
  structure 
  

  

  