﻿430 
  J. 
  Barrell 
  — 
  Upper 
  Devonian 
  Delta 
  of 
  the 
  

  

  Fig. 
  1. 
  

  

  Fig. 
  1. 
  The 
  Appalachian 
  geosyneline 
  at 
  the 
  close 
  of 
  the 
  Devonian. 
  

  

  