﻿IRON 
  ORES 
  OF 
  THE 
  CLINTON 
  FORMATION 
  41 
  

  

  The 
  character 
  of 
  the 
  fossil 
  ore 
  is 
  shown 
  by 
  the 
  following 
  

   analysis 
  made 
  by 
  E. 
  Touceda 
  on 
  a 
  sample 
  of 
  the 
  ore. 
  

  

  Fe 
  2 
  3 
  40.9 
  2 
  

  

  Si0 
  2 
  7-o6 
  

  

  Ti0 
  2 
  tr. 
  

  

  Al 
  2 
  O 
  a 
  11. 
  13 
  

  

  . 
  MnO 
  tr. 
  

  

  CaO 
  14.68 
  

  

  MgO 
  "... 
  3-84 
  

  

  S0 
  3 
  025 
  

  

  Po0 
  5 
  1.02 
  

  

  cb 
  2 
  16.3 
  

  

  H 
  2 
  (combined) 
  4-88 
  

  

  99.855 
  

  

  Iron 
  28.64 
  

  

  Phosphorus 
  . 
  445 
  

  

  ORE 
  DISTRIBUTION 
  AND 
  RESOURCES 
  

  

  Over 
  most 
  of 
  the 
  area 
  occupied 
  by 
  the 
  Clinton, 
  the 
  hematite 
  

   beds 
  contribute 
  an 
  essential 
  feature 
  to 
  the 
  sedimentary 
  succes- 
  

   sion. 
  They 
  are, 
  indeed, 
  next 
  to 
  the 
  shales, 
  the 
  most 
  persistent 
  

   element 
  in 
  the 
  formation 
  as 
  represented 
  in 
  the 
  State, 
  having 
  a 
  

   wider 
  development 
  than 
  either 
  the 
  limestones 
  or 
  sandstones. 
  

  

  Their 
  eastern 
  and 
  western 
  limits 
  are 
  somewhat 
  indefinite, 
  

   due 
  to 
  the 
  long 
  intervals 
  between 
  exposures; 
  it 
  is 
  a 
  question, 
  

   also, 
  not 
  of 
  an 
  abrupt 
  termination, 
  but 
  of 
  a 
  gradual 
  thinning 
  to 
  

   disappearance 
  with 
  the 
  progressive 
  diminution 
  of 
  the 
  formation 
  

   itself. 
  

  

  At 
  Rochester, 
  the 
  extreme 
  westerly 
  point 
  where 
  the 
  ore 
  is 
  

   known 
  to 
  be 
  represented, 
  there 
  is 
  a 
  single 
  bed 
  of 
  fossil 
  hematite 
  

   14 
  inches 
  thick. 
  This 
  is 
  very 
  likely 
  a 
  continuation 
  of 
  the 
  bed 
  

   which 
  stretches 
  across 
  Wayne 
  county 
  and 
  is 
  mined 
  at 
  Ontario 
  

   Center, 
  15 
  miles 
  northeast 
  of 
  Rochester. 
  At 
  any 
  rate 
  the 
  

   ore 
  shows 
  so 
  moderate 
  a 
  decrease 
  within 
  the 
  interval 
  that. 
  its 
  

   continuity 
  for 
  a 
  considerable 
  distance 
  farther 
  west 
  Seems 
  prob- 
  

   able. 
  Beyond 
  Rochester 
  there 
  are 
  no 
  good 
  exposures 
  until 
  the 
  

   Niagara 
  gorge 
  is 
  reached 
  where 
  the 
  ore 
  fails 
  entirely 
  and 
  the 
  

   whole 
  section 
  of 
  the 
  Clinton 
  is 
  reduced 
  to 
  40 
  feet 
  or 
  less. 
  

  

  