﻿IRON 
  ORES 
  OF 
  THE 
  CLINTON 
  FORMATION 
  1 
  3 
  

  

  to 
  overlapping 
  of 
  the 
  strata, 
  due 
  to 
  a 
  slight 
  uplift 
  which 
  seems 
  to 
  

   have 
  occurred 
  at 
  the 
  close 
  of 
  the 
  Clinton 
  age. 
  The 
  effect 
  of 
  the 
  

   uplift 
  is 
  apparent 
  in 
  limiting 
  the 
  transgression 
  of 
  the 
  Niagaran 
  sea 
  

   to 
  the 
  east, 
  causing 
  the 
  disappearance 
  of 
  the 
  upper 
  members 
  in 
  

   that 
  direction 
  and 
  bringing 
  the 
  Salina 
  into 
  contact 
  with 
  the 
  Clinton 
  

   beds. 
  

  

  The 
  whole 
  series 
  of 
  Upper 
  Siluric 
  strata 
  of 
  central 
  and 
  western 
  

   New 
  York 
  from 
  the 
  Medina 
  up 
  to 
  and 
  including 
  the 
  Niagaran 
  group 
  

   was 
  laid 
  down 
  in 
  the 
  great 
  mediterranean, 
  known 
  as 
  the 
  Mississip- 
  

   pian 
  sea, 
  which 
  came 
  into 
  existence 
  probably 
  during 
  Cambric 
  times. 
  

   The 
  sea 
  was 
  shut 
  off 
  from 
  the 
  Atlantic 
  basin 
  by 
  a 
  broad 
  barrier 
  that 
  

   extended 
  along 
  the 
  Appalachian 
  protaxis 
  from 
  New 
  Brunswick 
  

   through 
  New 
  England, 
  eastern 
  New 
  York 
  and 
  the 
  intervening 
  states 
  

   to 
  northern 
  Alabama 
  and 
  connected 
  on 
  the 
  north 
  with 
  the 
  conti- 
  

   nental 
  old-land 
  or 
  Laurentia 
  of 
  Canada. 
  At 
  the 
  opening 
  of 
  Upper 
  

   Siluric 
  time 
  the 
  barrier 
  had 
  assumed 
  increased 
  proportions 
  through 
  

   the 
  Taconic 
  revolution. 
  The 
  sediments 
  which 
  had 
  accumulated 
  along 
  

   the 
  shore 
  of 
  the 
  Appalachian 
  and 
  Canadian 
  regions 
  during 
  Cam- 
  

   bric 
  and 
  Lower 
  Siluric 
  times 
  were 
  upraised 
  and 
  folded. 
  Thus, 
  the 
  

   entire 
  eastern 
  section 
  of 
  New 
  York 
  State 
  became 
  land. 
  Follow- 
  

   ing 
  this 
  uplift 
  the 
  interior 
  sea 
  began 
  to 
  extend 
  its 
  limits 
  so 
  that 
  the 
  

   Upper 
  Siluric 
  deposits 
  encroached 
  more 
  and 
  more 
  upon 
  the 
  land 
  

   surface 
  to 
  the 
  east. 
  

  

  With 
  the 
  Cayugan 
  period, 
  sedimentation 
  took 
  place 
  again 
  in 
  

   southeastern 
  New 
  York. 
  Representatives 
  of 
  this 
  group 
  are 
  found 
  

   across 
  the 
  State 
  from 
  the 
  Niagara 
  river 
  to 
  Albany 
  county. 
  Here 
  

   their 
  line 
  of 
  outcrop 
  bends 
  to 
  the 
  south, 
  passing 
  into 
  Ulster 
  county, 
  

   and 
  thence 
  southwest 
  through 
  Sullivan 
  and 
  Orange 
  counties 
  and 
  

   into 
  New 
  Jersey 
  in 
  the 
  vicinity 
  of 
  Port 
  Jervis. 
  Disconnected 
  areas, 
  

   constituting 
  outliers 
  of 
  the 
  main 
  belts, 
  are 
  met 
  with 
  in 
  Orange 
  

   county, 
  running 
  southwest 
  from 
  the 
  Skunnemunk 
  mountain 
  region. 
  

   These 
  outliers 
  consist 
  of 
  conglomerate 
  of 
  Salina 
  age 
  (the 
  Shawan- 
  

   gunk 
  conglomerate 
  of 
  New 
  York 
  State 
  and 
  the 
  Green 
  Pond 
  con- 
  

   glomerate 
  of 
  New 
  Jersey) 
  followed 
  by 
  a 
  series 
  of 
  sandstones, 
  

   shales 
  and 
  limestones. 
  Formerly 
  the 
  series 
  was 
  considered 
  to 
  be- 
  

   long 
  to 
  an 
  earlier 
  period 
  of 
  deposition, 
  the 
  conglomerate 
  having 
  

   "been 
  taken 
  for 
  the 
  equivalent 
  of 
  the 
  Oneida 
  in 
  central 
  New 
  York 
  

   and 
  some 
  of 
  the 
  overlying 
  beds 
  for 
  the 
  Clinton. 
  

  

  The 
  Upper 
  Siluric 
  beds 
  follow 
  each 
  other 
  in 
  conformable 
  ar- 
  

   rangement. 
  After 
  the 
  Taconic 
  upheaval 
  sedimentation 
  appears 
  to 
  

   have 
  been 
  continuous 
  during 
  the 
  w 
  r 
  hcle 
  of 
  the 
  following 
  era. 
  The 
  

  

  