﻿THE 
  GEOLOGICAL 
  HISTORY 
  OF 
  NEW 
  YORK 
  STATE 
  

  

  45 
  

  

  that 
  the 
  western 
  and 
  southern 
  portions 
  of 
  the 
  State 
  were 
  submerged 
  

   under 
  the 
  Ordovicic 
  sea. 
  In 
  northern 
  New 
  York, 
  however, 
  there 
  

   is 
  no 
  positive 
  evidence 
  whatever 
  that 
  the 
  whole 
  Adirondack 
  area 
  

   was 
  ever 
  completely 
  submerged 
  during 
  this 
  period. 
  Accordingly 
  

   the 
  central 
  Adirondacks 
  formed 
  a 
  persistent 
  island 
  in 
  the 
  Ordovicic 
  

   sea. 
  Furthermore, 
  in 
  northern 
  New 
  York 
  there 
  were 
  various 
  rather 
  

  

  Fig. 
  16 
  Generalized 
  map 
  of 
  North 
  America 
  showing 
  the 
  relations 
  of 
  land 
  

   and 
  water 
  during 
  the 
  Midordovicic 
  period. 
  Horizontally 
  lined 
  areas 
  = 
  land 
  ; 
  

   blank 
  areas 
  = 
  water. 
  All 
  of 
  New 
  York 
  State 
  was 
  submerged 
  except 
  

   the 
  central 
  Adirondacks 
  which 
  stood 
  out 
  as 
  an 
  island. 
  The 
  conditions 
  in 
  

   Mexico 
  and 
  Central 
  America 
  are 
  practically 
  unknown. 
  

  

  local 
  oscillations 
  of 
  level 
  bringing 
  the 
  land 
  around 
  the 
  island 
  now 
  

   above 
  and 
  now 
  below 
  sea 
  level, 
  but 
  all 
  such 
  details 
  are 
  here 
  omitted. 
  

   For 
  our 
  purpose 
  it 
  will 
  suffice 
  to 
  say 
  that, 
  except 
  for 
  the 
  Adirondack 
  

   island, 
  northern 
  New 
  York 
  was 
  mostly 
  below 
  sea 
  level 
  during 
  the 
  

   Ordovicic. 
  To 
  summarize 
  the 
  above 
  statement 
  : 
  New 
  York 
  State 
  

  

  