﻿24 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  that 
  were 
  built 
  in 
  the 
  marine 
  waters 
  that 
  occupied 
  the 
  valley 
  as 
  

   the 
  ice 
  gave 
  way. 
  This 
  water 
  plane 
  rises 
  from 
  zero 
  in 
  the 
  vicin- 
  

   ity 
  of 
  New 
  York 
  to 
  at 
  least 
  350 
  feet 
  at 
  Schenectady, 
  or 
  at 
  the 
  

   rate 
  of 
  2.2 
  feet 
  a 
  mile. 
  

  

  The 
  practical 
  continuity 
  and 
  correspondence 
  in 
  level 
  of 
  the 
  

   highest 
  water 
  plane 
  on 
  both 
  sides 
  of 
  the 
  Hudson-Champlain 
  val- 
  

   ley 
  proves 
  that 
  the 
  waters 
  rilled 
  the 
  entire 
  breadth 
  of 
  the 
  valley 
  

   and 
  that 
  the 
  shore 
  phenomena 
  are 
  not 
  the 
  product 
  of 
  ice-border 
  

   lakes. 
  It 
  also 
  appears 
  that 
  the 
  waters 
  were 
  not 
  held 
  up 
  by 
  any 
  

   moraine 
  dam 
  or 
  any 
  barrier 
  of 
  land 
  uplift. 
  

  

  Over 
  the 
  Fort 
  Edward 
  divide 
  the 
  waters 
  were 
  more 
  than 
  300 
  

   feet 
  deep, 
  and 
  all 
  the 
  phenomena, 
  in 
  the 
  Fort 
  Edward-Schuyler- 
  

   ville 
  district 
  are 
  those 
  of 
  static 
  waters, 
  slowly 
  lowering 
  and 
  ter- 
  

   racing 
  the 
  copious 
  detrital 
  deposits 
  on 
  both 
  sides 
  of 
  the 
  valley. 
  

   There 
  is 
  found 
  no 
  evidence 
  of 
  any 
  glacial 
  stream 
  flow 
  below 
  the 
  

   summit 
  water 
  plane. 
  

  

  As 
  the 
  ice 
  front 
  melted 
  back 
  the 
  ocean 
  followed 
  it 
  and 
  flooded 
  

   the 
  valley. 
  The 
  waters 
  were 
  at 
  first 
  the 
  Hudson 
  inlet 
  ; 
  later 
  the 
  

   Hudson-Champlain 
  inlet; 
  and 
  finally 
  the 
  Hudson-Champlain 
  strait. 
  

  

  The 
  minimum 
  amount 
  of 
  continental 
  uplift 
  on 
  the 
  Canadian 
  

   boundary 
  is 
  approximately 
  determined 
  by 
  the 
  deformation 
  of 
  the 
  

   Iroquois 
  plane. 
  In 
  the 
  former 
  report 
  (page 
  32) 
  it 
  was 
  shown 
  

   that 
  if 
  we 
  assume 
  the 
  Covey 
  gulf 
  outlet 
  of 
  Lake 
  Iroquois 
  to 
  

   have 
  been 
  no 
  lower 
  than 
  the 
  original 
  Rome 
  outlet, 
  then 
  the 
  dis- 
  

   trict 
  must 
  have 
  been 
  lifted 
  at 
  least 
  665 
  feet. 
  This 
  makes 
  the 
  

   Covey 
  hill 
  bars 
  140 
  feet 
  below 
  the 
  marine 
  summit. 
  The 
  total 
  

   uplift 
  must 
  have 
  been 
  as 
  much 
  more 
  than 
  665 
  feet 
  as 
  the 
  gulf 
  

   outlet 
  was 
  beneath 
  the 
  plane 
  of 
  the 
  Rome 
  outlet. 
  The 
  study 
  of 
  

   the 
  high-level 
  shore 
  phenomena 
  leads 
  to 
  the 
  confident 
  belief 
  that 
  

   the 
  Covey 
  hill 
  district 
  has 
  been 
  uplifted 
  at 
  least 
  750 
  feet 
  since 
  

   the 
  ocean 
  waters 
  displaced 
  the 
  ice 
  sheet. 
  This 
  would 
  carry 
  the 
  

   gulf 
  channel 
  only 
  85 
  feet 
  beneath 
  the 
  Rome 
  outlet. 
  

  

  Summary. 
  Heavy 
  and 
  conspicuous 
  static 
  water 
  phenomena 
  

   occur 
  with 
  practical 
  continuity 
  on 
  both 
  sides 
  of 
  the 
  Hudson- 
  

   Champlain 
  valley 
  from 
  New 
  York 
  City 
  to 
  Canada, 
  rising 
  steadily 
  

   from 
  zero 
  at 
  New 
  York 
  to 
  750 
  feet 
  at 
  the 
  north 
  edge 
  of 
  the 
  State. 
  

   Above 
  this 
  plane 
  the 
  land 
  is 
  cut 
  by 
  glacial 
  drainage. 
  All 
  the 
  

   facts 
  now 
  known 
  and 
  the 
  relationship 
  of 
  the 
  beaches 
  to 
  the 
  to- 
  

   pography 
  of 
  the 
  valley 
  walls 
  indicate 
  that 
  the 
  waters 
  were 
  con- 
  

   fluent 
  with 
  the 
  ocean. 
  The 
  absence 
  of 
  marine 
  fossils 
  in 
  the 
  

  

  