﻿Fig-.l. 
  

   Hesperus 
  J^ountain 
  from 
  Sentinel 
  Rochm 
  

  

  Shoyt^inff 
  Mr^clffes 
  emd 
  sfieete 
  of 
  trachyte 
  iivtrudecl 
  into 
  the 
  

   shales 
  irom 
  JMt-Moss. 
  

  

  FlateXLV. 
  

  

  AM. 
  PH0T0-LITH9. 
  CO. 
  N. 
  Y. 
  ( 
  OSSORNE'S 
  PB0CESS.1 
  

  

  Fig. 
  2. 
  

   Ideal 
  Section 
  of 
  the 
  Ld 
  a 
  Plata 
  Mountains 
  , 
  

  

  Shovfririff 
  the 
  supposed 
  methoof 
  of 
  ijitruaion 
  of 
  trczchyte 
  > 
  

   a. 
  a. 
  Is 
  the 
  present 
  jor 
  a 
  file, 
  which 
  cuts 
  Hesperus 
  Mtn.ancL 
  Mt.Mosa. 
  

  

  