﻿rl04: 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  This 
  would 
  mean 
  a 
  fall 
  of 
  some 
  50 
  feet 
  in 
  the 
  Danbv 
  waters, 
  and 
  

   while 
  no 
  evidence 
  has 
  been 
  found 
  favoring 
  such 
  an 
  hypothesis, 
  

   the 
  subsidence 
  from 
  the 
  West 
  Danbj 
  to 
  the 
  Ithaca 
  level 
  was 
  prob- 
  

   ably 
  sudden. 
  The 
  Ithaca 
  level 
  was 
  maintained 
  for 
  a 
  much 
  longer 
  

   time, 
  since 
  large 
  and 
  well 
  defined 
  terraces 
  are 
  found 
  marking 
  its 
  

   level 
  in 
  both 
  arms 
  of 
  the 
  vallej. 
  This 
  meant 
  a 
  retreat 
  of 
  approxi- 
  

   mately 
  25 
  miles 
  to 
  the 
  north 
  before 
  the 
  Ithaca 
  lake 
  stage 
  

   was 
  closed. 
  At 
  the 
  same 
  time 
  and 
  co-extensive 
  with, 
  but 
  separate 
  

   from 
  glacial 
  lake 
  Ithaca, 
  was 
  glacial 
  lake 
  Watkins, 
  which 
  was 
  rather 
  

   a 
  long-lived 
  lake, 
  as 
  it 
  endured 
  for 
  a 
  length 
  of 
  time 
  sufficient 
  for 
  

   the 
  ice 
  to 
  withdraw 
  from 
  the 
  Horseheads 
  divide 
  to 
  the 
  town 
  of 
  Ovid, 
  

   a 
  distance 
  of 
  some 
  35 
  miles. 
  When 
  the 
  divide 
  in 
  the 
  Ovid 
  

   region 
  was 
  reached 
  by 
  the 
  retreat 
  of 
  the 
  ice 
  occupying 
  Cayuga 
  and 
  

   Seneca 
  valleys, 
  the 
  Ithaca 
  lake 
  stage 
  was 
  closed 
  by 
  a 
  rapid 
  falling 
  of 
  

   its 
  waters 
  to 
  the 
  level 
  of 
  the 
  Horseheads 
  divide. 
  The 
  drainage 
  was 
  

   then 
  shifted 
  from 
  the 
  White 
  Church 
  to 
  the 
  Horseheads 
  col, 
  indi- 
  

   cating 
  a 
  fall 
  of 
  some 
  75 
  feet 
  from 
  the 
  Ithaca 
  to 
  the 
  l^Jewberry 
  level. 
  

   This 
  marks 
  the 
  beginning 
  of 
  glacial 
  lake 
  Newberry. 
  At 
  the 
  same 
  

   time 
  the 
  Hammondsport 
  level 
  was 
  abandoned 
  and 
  its 
  watei'S 
  fell 
  

   to 
  and 
  coalesced 
  with 
  those 
  of 
  lake 
  Newberry, 
  then 
  formed 
  by 
  the 
  

   united 
  waters 
  of 
  lakes 
  Watkins 
  and 
  Ithaca 
  discharging 
  south 
  through 
  

   Seneca 
  valley. 
  The 
  change 
  in 
  level 
  from 
  the 
  Hammondsport 
  to 
  

   the 
  Newberry 
  stage 
  was 
  not 
  a 
  very 
  sudden 
  one, 
  but 
  rather 
  slow, 
  

   marked 
  by 
  definite, 
  intermediate 
  terraces 
  found 
  on 
  the 
  same 
  stream 
  

   between 
  the 
  two 
  levels. 
  This 
  stage 
  in 
  the 
  Newberj'y 
  level 
  was 
  held 
  

   until 
  the 
  ice 
  had 
  retreated 
  sufficiently 
  far 
  northward 
  to 
  open 
  up 
  the 
  

   low 
  lands 
  at 
  the 
  outlets 
  of 
  Canandaiguaand 
  Flint 
  creek 
  on 
  the 
  west, 
  and 
  

   Owasco 
  and 
  probably 
  Skaneateles 
  on 
  the 
  east 
  ; 
  when 
  the 
  waters 
  mark- 
  

   ing 
  the 
  higher 
  levels 
  in 
  the 
  southern 
  portions 
  of 
  each 
  of 
  these 
  lake 
  

   valleys 
  fell 
  to 
  the 
  level 
  of 
  and 
  united 
  with 
  the 
  Newberry 
  stage 
  then 
  

   existing 
  in 
  Cayuga, 
  Seneca 
  and 
  Keuka 
  lake 
  valleys. 
  When 
  this 
  final 
  

   coalescing 
  of 
  the 
  waters 
  from 
  all 
  the 
  lakes 
  occurred, 
  lake 
  Newberry 
  

   occupied 
  its 
  maximum 
  extent, 
  which 
  was 
  held 
  until 
  the 
  Victor 
  and 
  

   Miller's 
  corners 
  area 
  was 
  uncovered. 
  The 
  Newberry 
  stage 
  was 
  then 
  

   closed 
  by 
  a 
  falling 
  of 
  its 
  waters 
  to 
  the 
  Warren 
  level, 
  when 
  the 
  out- 
  

   let 
  was 
  shifted 
  from 
  Horseheads 
  to 
  the 
  Warren 
  overflow 
  at 
  Chicago. 
  

   The 
  subsidence 
  between 
  the 
  Newberry 
  and 
  Warren 
  levels 
  was 
  

   gradual, 
  as 
  shown 
  in 
  terraces 
  found 
  only 
  at 
  a 
  few 
  feet 
  below 
  the 
  

  

  