﻿92 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  is 
  shown 
  by 
  the 
  complete 
  absence 
  of 
  the 
  Oneida 
  conglomerate 
  and 
  

   the 
  nearly 
  complete 
  absence 
  of 
  the 
  Clinton 
  and 
  Niagara 
  formations 
  

   from 
  southern 
  Herkimer 
  county 
  eastward. 
  Such 
  a 
  widespread 
  and 
  

   important 
  elevation 
  of 
  the 
  land 
  in 
  the 
  Mohawk 
  valley 
  region 
  almost 
  

   certainly 
  upraised 
  the 
  whole 
  southern 
  Adirondacks 
  except 
  possibly 
  

   the 
  very 
  western 
  border. 
  Cushing 
  3 
  has 
  given 
  evidence 
  to 
  show 
  that 
  

   the 
  northeastern 
  Adirondack 
  area 
  was 
  distinctly 
  elevated 
  even 
  

   earlier 
  in 
  the 
  late 
  Ordovicic 
  than 
  the 
  southern 
  area. 
  It 
  is 
  more 
  

   than 
  probable 
  that 
  this 
  period 
  of 
  elevation 
  in 
  northern 
  New 
  York 
  

   culminated 
  with 
  the 
  great 
  Taconic 
  revolution. 
  

  

  To 
  summarize 
  for 
  Ordovicic 
  Posttrenton 
  time 
  we 
  find 
  that 
  a 
  con- 
  

   siderable 
  portion 
  of 
  the 
  western 
  side 
  of 
  the 
  Adirondacks 
  was 
  sub- 
  

   merged, 
  while 
  the 
  whole 
  middle 
  and 
  eastern 
  portion 
  was 
  dry 
  land 
  

   except 
  possibly 
  locally 
  along 
  the 
  southeastern 
  border 
  during 
  the 
  

   deposition 
  of 
  the 
  Indian 
  Ladder 
  beds. 
  After 
  the 
  deposition 
  of 
  the 
  

   Frankfort 
  shales 
  there 
  was 
  an 
  important 
  uplift 
  (inaugurating 
  the 
  

   Taconic 
  revolution) 
  which 
  brought 
  the 
  whole 
  southern 
  Adirondack 
  

   area, 
  except 
  probably 
  the 
  very 
  western 
  border, 
  well 
  above 
  sea 
  

   level, 
  and 
  we 
  have 
  no 
  good 
  reason 
  to 
  think 
  that 
  any 
  considerable 
  

   portion 
  of 
  the 
  Adirondack 
  region 
  was 
  ever 
  again 
  submerged. 
  

  

  Some 
  of 
  the 
  more 
  important 
  conclusions, 
  regarding 
  the 
  early 
  

   Paleozoic 
  physiography 
  of 
  the 
  southern 
  Adirondacks, 
  reached 
  in 
  

   this 
  paper 
  are 
  the 
  following: 
  

  

  i 
  The 
  early 
  Paleozoic 
  sea 
  encroached 
  upon 
  a 
  more 
  or 
  less 
  well- 
  

   developed 
  peneplain 
  in 
  the 
  Adirondack 
  region, 
  this 
  peneplain 
  being 
  

   moderately 
  rugged 
  in 
  the 
  northeastern 
  and 
  eastern 
  portions 
  ; 
  less 
  

   so 
  in 
  the 
  southern 
  portion 
  ; 
  and 
  very 
  smooth 
  in 
  the 
  southwestern 
  

   portion, 
  such 
  a 
  difference 
  in 
  character 
  of 
  the 
  peneplain 
  no 
  doubt 
  

   being 
  due 
  to 
  the 
  fact 
  that 
  the 
  southwestern 
  portion 
  longest 
  re- 
  

   mained 
  above 
  sea 
  level. 
  

  

  2 
  When 
  the 
  early 
  Paleozoic 
  sea 
  encroached 
  upon 
  the 
  region 
  it 
  

   did 
  not 
  set 
  up 
  embayments 
  or 
  estuaries 
  in 
  the 
  Precambric 
  rock 
  

   area, 
  except 
  possibly 
  to 
  some 
  extent 
  on 
  the 
  eastern 
  side, 
  as 
  shown 
  

   by 
  the 
  peneplain 
  character 
  of 
  the 
  Precambric 
  rock 
  surface 
  ; 
  the 
  

   typical 
  marine 
  character 
  of 
  the 
  deposits 
  in 
  the 
  Paleozoic 
  rock 
  out- 
  

   liers 
  ; 
  and 
  the 
  downfaulted 
  structure 
  of 
  the 
  outliers. 
  

  

  3 
  The 
  region 
  was 
  never 
  completely 
  submerged 
  during 
  the 
  Paleo- 
  

   zoic 
  era 
  though, 
  at 
  the 
  time 
  of 
  maximum 
  submergence 
  during 
  the 
  

   Trenton, 
  only 
  a 
  comparatively 
  small 
  land 
  mass 
  remained. 
  

  

  3 
  Page 
  285. 
  

  

  