﻿54 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  pancy 
  of 
  the 
  deepest 
  part 
  of 
  the 
  valley 
  during 
  the 
  existence 
  of 
  the 
  

   large 
  lake. 
  In 
  his 
  description 
  of 
  the 
  deposits 
  along 
  the 
  Connecticut 
  

   river, 
  Gulliver 
  has 
  noted 
  similar 
  features 
  and 
  argues 
  that 
  those 
  

   deposits 
  must 
  have 
  formed 
  before 
  the 
  ice 
  had 
  completely 
  melted 
  

   from 
  the 
  valley.^ 
  

  

  The 
  highest 
  water 
  level 
  in 
  this 
  lake 
  was 
  apparently 
  something 
  

   over 
  1300 
  feet 
  at 
  which 
  time 
  an 
  outlet 
  probably 
  crossed 
  the 
  Black 
  

   river-West 
  Canada 
  creek 
  divide^ 
  near 
  Honnedaga 
  (Remsen 
  sheet) 
  

   and 
  flowed 
  southward 
  toward 
  Trenton 
  Falls. 
  Possibly 
  the 
  extensive 
  

   sand 
  deposits 
  near 
  the 
  latter 
  place 
  were 
  formed 
  by 
  this 
  outlet, 
  

   although 
  West 
  Canada 
  creek 
  may 
  have 
  contributed 
  to 
  their 
  forma- 
  

   tion. 
  Further 
  retreat 
  of 
  the 
  ice 
  lobe 
  down 
  the 
  Black 
  river 
  valley 
  

   certainly 
  opened 
  an 
  outlet 
  southwestward 
  past 
  Boonville 
  and 
  down 
  

   Lansing 
  kill 
  toward 
  Rome 
  causing 
  deposition 
  of 
  the 
  great 
  

   delta 
  deposits 
  north 
  of 
  the 
  latter 
  place. 
  This 
  delta 
  no 
  doubt 
  

   formed 
  in 
  Lake 
  Iroquois 
  or 
  rather 
  its 
  broad 
  outlet 
  in 
  the 
  Mohawk 
  

   valley. 
  This 
  outlet 
  from 
  the 
  glacial 
  lake 
  affords 
  a 
  fine 
  example 
  of 
  

   a 
  " 
  through 
  valley 
  " 
  to 
  use 
  the 
  term 
  suggested 
  by 
  Davis. 
  The 
  pre- 
  

   glacial 
  divide 
  was 
  doubtless 
  near 
  Hurlbutville 
  as 
  shown 
  by 
  the 
  

   widening 
  of 
  the 
  channel 
  both 
  northward 
  and 
  southward 
  from 
  that 
  

   place; 
  by 
  the 
  existence 
  there 
  of 
  a 
  deep 
  inner 
  gorge; 
  by 
  the 
  ag- 
  

   graded 
  stream 
  bottom 
  north 
  of 
  Hurlbutville 
  ; 
  by 
  the 
  fact 
  that 
  the 
  

   present 
  stream 
  could 
  not 
  have 
  cut 
  the 
  deep 
  narrow 
  channel 
  north 
  

   of 
  Hurlbutville 
  and 
  by 
  the 
  right 
  elevation 
  of 
  an 
  outlet 
  there. 
  The 
  

   lake 
  stood 
  at 
  approximately 
  the 
  1250 
  foot 
  level 
  when 
  it 
  started 
  over 
  

   this 
  divide 
  and 
  it 
  cut 
  down 
  the 
  divide 
  rapidly 
  until 
  the 
  1140 
  foot 
  

   level 
  in 
  the 
  lake 
  was 
  reached. 
  By 
  this 
  time 
  the 
  ice 
  tongue 
  had 
  so 
  

   far 
  melted 
  as 
  to 
  allow 
  an 
  escape 
  of 
  the 
  water 
  northerly 
  and 
  north- 
  

   westerly 
  along 
  the 
  west 
  side 
  of 
  the 
  ice 
  tongue 
  and 
  into 
  Lak? 
  

   Iroquois 
  near 
  Watertown. 
  These 
  north 
  moving 
  waters 
  have 
  left 
  

   the 
  limestones 
  just 
  west 
  of 
  the 
  river 
  more 
  or 
  less 
  waterworn 
  and 
  

   possibly 
  some 
  of 
  the 
  minor 
  terraces 
  were 
  formed 
  by 
  them. 
  

  

  Another 
  lower 
  and 
  very 
  distinct 
  lake 
  level 
  was 
  a 
  little 
  below 
  800 
  

   feet 
  and 
  caused 
  by 
  still 
  further 
  ice 
  retreat 
  to 
  allow 
  an 
  accumulation 
  

   of 
  water 
  back 
  of 
  a 
  barrier 
  at 
  Carthage. 
  The 
  river 
  is 
  still 
  engaged 
  

   in 
  cutting 
  through 
  this 
  barrier. 
  This 
  lake 
  extended 
  southward 
  to 
  

   Lyons 
  Falls 
  where 
  it 
  was 
  very 
  narrow. 
  Between 
  Lyons 
  Falls 
  and 
  

   Carthage 
  the 
  river 
  now 
  shows 
  a 
  very 
  low 
  gradient 
  and 
  the 
  winding 
  

  

  'Am. 
  Geo!. 
  Soc. 
  Proc. 
  1907. 
  18:640. 
  

  

  ^The 
  rather 
  recent 
  land 
  movements 
  in 
  the 
  region 
  are 
  not 
  considered. 
  

   Thus 
  the 
  elevations 
  given 
  are 
  comparative 
  only, 
  but 
  they 
  are 
  not 
  far 
  from 
  

   the 
  actual 
  lake 
  levels 
  which 
  were 
  doubtless 
  lower. 
  

  

  