﻿Education 
  Department 
  Bulletin 
  

  

  Published 
  monthly 
  by 
  the 
  University 
  of 
  the 
  State 
  of 
  New^York 
  

  

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  at 
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  N. 
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  as 
  second-class 
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  NO. 
  423 
  ALBANY, 
  N. 
  Y. 
  APRIL 
  1908 
  

  

  New 
  York 
  State 
  Museum 
  

  

  John 
  M. 
  Clarke,' 
  Director 
  

   Museum 
  Bulletin 
  119 
  

  

  GEOLOGY 
  OF 
  THE 
  ADIRONDACK 
  MAGNETIC 
  

   IRON 
  ORES 
  

  

  BY 
  

  

  DAVID 
  H. 
  NEWLAND 
  

  

  WITH 
  A 
  REPORT 
  ON 
  THE 
  

  

  MINEVILLE-PORT 
  HENRY 
  MINE 
  GROUP 
  

  

  BY 
  

  

  JAMES 
  F. 
  KEMP 
  

  

  » 
  

  

  INTRODUCTION 
  

  

  The 
  description 
  of 
  the 
  Adirondack 
  magnetites 
  has 
  been 
  pre- 
  

   pared 
  in 
  partial 
  fulfilment 
  of 
  a 
  plan 
  to 
  give 
  an 
  account 
  of 
  the 
  iron 
  

   ore 
  deposits 
  throughout 
  the 
  State. 
  Field 
  work 
  was 
  started 
  in 
  the 
  

   Adirondacks 
  in 
  1905 
  and 
  has 
  been 
  carried 
  on, 
  as 
  opportunity 
  

   offered, 
  during 
  each 
  succeeding 
  season. 
  It 
  is 
  hoped 
  to 
  complete 
  the 
  

   investigation 
  of 
  the 
  other 
  ore-bearing 
  regions 
  in 
  the 
  near 
  future. 
  

  

  In 
  the 
  present 
  report 
  Prof. 
  James 
  F. 
  Kemp 
  has 
  contributed 
  the 
  

   part 
  relating 
  to 
  the 
  important 
  Mineville 
  deposits, 
  a 
  section 
  which 
  he 
  

   has 
  recently 
  mapped 
  in 
  connection 
  with 
  the 
  geological 
  investiga- 
  

   tion 
  that 
  is 
  being 
  carried 
  on 
  in 
  the 
  region 
  under 
  direction 
  of 
  the 
  

   State 
  Geologist. 
  

  

  The 
  Adirondack 
  region 
  of 
  crystalline 
  rocks 
  affords 
  a 
  variety 
  of 
  

   iron 
  ores 
  differing 
  in 
  their 
  character 
  and 
  geological 
  surroundings. 
  

   Those 
  found 
  in 
  sufficient 
  abundance 
  to 
  be 
  exploitable 
  commer- 
  

   cially 
  may 
  be 
  classified 
  under 
  the 
  main 
  groups 
  — 
  (1) 
  nontitaniferous 
  

  

  5 
  

  

  