﻿REPORT 
  OF 
  THE 
  DIRECTOR 
  rl05 
  

  

  former 
  level 
  down 
  to 
  the 
  lowest 
  terraces 
  of 
  tlie 
  latter 
  stage. 
  It 
  is 
  

   especially 
  noteworthy 
  that, 
  in 
  the 
  coalescing 
  of 
  the 
  waters 
  in 
  the 
  

   several 
  valleys 
  when 
  the 
  outlet 
  was 
  shifted 
  from 
  one 
  col 
  to 
  the 
  next 
  

   lower, 
  the 
  change 
  of 
  level 
  of 
  the 
  subsiding 
  Avaters 
  was 
  not 
  by 
  

   a 
  sudden 
  fall, 
  but 
  generally 
  more 
  or 
  less 
  gradual. 
  This 
  is 
  

   especially 
  noticeable 
  in 
  the 
  case. 
  of 
  the 
  three 
  local 
  lakes, 
  Watkins, 
  

   Hammondsport 
  and 
  Naples, 
  and 
  the 
  general 
  lake 
  Newberry. 
  The 
  

   condition 
  of 
  gradual 
  subsidence 
  in 
  the 
  waters 
  is 
  marked 
  by 
  distinct 
  

   terraces 
  existing 
  at 
  intermediate 
  levels 
  between 
  those 
  marking 
  the 
  

   two 
  stage 
  limits. 
  A 
  comparison 
  of 
  the 
  h.gher 
  stages 
  in 
  the 
  Cayuga 
  

   basin 
  with 
  that 
  of 
  Lake 
  Cayuga, 
  based 
  on 
  the 
  difference 
  in 
  elevation 
  

   of 
  the 
  outlets, 
  is 
  shown 
  in 
  the 
  following 
  diagram. 
  

  

  Fig. 
  27 
  

  

  West 
  Danby__672t 
  feet 
  

  

  .Ithaca 
  ^ 
  6 
  22 
  £ 
  ' 
  .. 
  

  

  NewbeK-t-;)^ 
  547 
  1 
  .1 
  

  

  - 
  Wa 
  KKsn 
  A-1 
  2. 
  + 
  .1 
  

  

  Cayuga 
  lake 
  level 
  feet 
  

  

  Diagram 
  showing 
  the 
  relation 
  of 
  the 
  higher 
  lake 
  levels 
  to 
  that 
  of 
  Lake 
  Cayuga 
  in 
  the 
  Cayuga 
  lake 
  

   valley. 
  Based 
  on 
  the 
  difference 
  in 
  elevation 
  of 
  the 
  lake 
  outlets. 
  

  

  Features 
  in 
  the 
  development 
  of 
  the 
  terraces 
  which 
  have 
  

   rendered 
  their 
  correlation 
  difficult 
  

  

  The 
  principal 
  and 
  all 
  important 
  elements 
  concerned 
  in 
  the 
  devel- 
  

   opment 
  of 
  lake 
  shore 
  features 
  are 
  time, 
  depth 
  of 
  water 
  and 
  size 
  of 
  

   lake, 
  coupled 
  with 
  that 
  of 
  stream 
  volume 
  and 
  load. 
  .Of 
  course, 
  

   the 
  longer 
  the 
  waters 
  are 
  held 
  atone 
  level, 
  other 
  things 
  being 
  equal, 
  

   the 
  larger, 
  more 
  distinct 
  and 
  perfectly 
  developed 
  will 
  be 
  the 
  shore 
  

   lines. 
  Relying 
  on 
  this 
  last 
  principle 
  some 
  inference 
  can 
  be 
  drawn 
  

   relative 
  to 
  the 
  duration 
  of 
  an 
  extinct 
  lake's 
  waters 
  while 
  sustained 
  

   at 
  a 
  certain 
  level 
  : 
  that 
  is 
  to 
  say, 
  the 
  degree 
  of 
  development 
  of 
  the 
  

   lacustrine 
  shore 
  features 
  will 
  be 
  proportional 
  to 
  the 
  duration 
  of 
  the 
  

   extinct 
  lake, 
  or, 
  the 
  time 
  during 
  which 
  the 
  waters 
  marked 
  one 
  con- 
  

   tinuous 
  level. 
  It 
  should 
  follow 
  therefore, 
  from 
  the 
  above 
  that 
  the 
  

  

  