﻿llEPOKT 
  OF 
  THE 
  DIRECTOR 
  1*143 
  

  

  moving 
  off 
  nearly 
  at 
  right 
  angles 
  and 
  carving 
  out 
  tlie 
  valley 
  of 
  Six 
  

   Mile 
  creek. 
  He 
  says 
  of 
  these 
  valleys 
  : 
  

  

  ""Noting 
  in 
  addition 
  (to 
  their 
  even 
  slope) 
  the 
  depth 
  at 
  which 
  

   the 
  water 
  flows 
  and 
  the 
  small 
  number 
  of 
  cascades 
  and 
  waterfalls, 
  the 
  

   conclusion 
  is 
  at 
  once 
  reached 
  that 
  these 
  valleys 
  have 
  been 
  acted 
  

   upon 
  by 
  some 
  agency 
  not 
  now 
  in 
  operation." 
  

  

  Foote 
  writes 
  in 
  about 
  the 
  same 
  line, 
  and 
  he 
  believes 
  that 
  

   icebergs 
  played 
  an 
  important 
  part 
  here. 
  Both 
  he 
  and 
  Simonds 
  

   neglected 
  to 
  notice 
  that 
  these 
  " 
  broad 
  valleys 
  " 
  are 
  found 
  in 
  this 
  

   region 
  running 
  in 
  almost 
  every 
  direction, 
  and 
  therefore 
  that 
  the 
  

   glacier 
  could 
  not 
  possibly 
  account 
  for 
  them. 
  

  

  Still 
  later, 
  Spencer 
  arrives 
  at 
  a 
  different 
  conclusion. 
  He 
  writes 
  — 
  

   ^''Though 
  the 
  bottoms 
  of 
  these 
  lakes 
  are 
  frequently 
  helow 
  the 
  sea 
  

   level, 
  yet 
  in 
  no 
  case, 
  that 
  I 
  am 
  aware 
  of, 
  are 
  they 
  nearly 
  as 
  deep 
  as 
  

   Lake 
  Ontario. 
  Doubtless 
  these 
  small 
  lakes 
  were 
  former 
  expansions 
  

   of 
  the 
  rivers 
  running 
  into 
  Lake 
  Ontario 
  in 
  preglacial 
  times, 
  and 
  owe 
  

   to 
  ice, 
  simply, 
  the 
  closing 
  of 
  their 
  outlets 
  by 
  drift." 
  

  

  Prof. 
  Davis' 
  opinion 
  was, 
  (referring 
  to 
  Cayuga 
  lake) 
  — 
  "-■ 
  " 
  Its 
  

   trough 
  was 
  cut 
  by 
  an 
  old 
  stream 
  flowing 
  from 
  the 
  New 
  York 
  and 
  

   Pennsylvania 
  plateau, 
  northward 
  into 
  Lake 
  Ontario, 
  at 
  a 
  time 
  when 
  

   the 
  drainage 
  of 
  the 
  region 
  ran 
  in 
  channels 
  considerably 
  below 
  present 
  

   river 
  levels 
  ; 
  glacial 
  erosion 
  has 
  probably 
  smoothed 
  and 
  deepened 
  

   it, 
  but 
  to 
  suppose 
  it 
  entirely 
  so 
  formed 
  would 
  imply 
  the 
  production 
  

   of 
  a 
  tongue 
  of 
  ice 
  from 
  the 
  front 
  of 
  the 
  old 
  glacier, 
  peculiar 
  in 
  form 
  

   and 
  remarkable 
  in 
  erosive 
  power; 
  the 
  supposition 
  that 
  it 
  is 
  the 
  

   result 
  of 
  down 
  faulting 
  or 
  local 
  subsidence, 
  is 
  negatived 
  by 
  the 
  

   absence 
  of 
  disturbance 
  in 
  the 
  neighboring 
  hills 
  ; 
  to 
  call 
  it 
  a 
  rock 
  

   basin 
  is 
  entirely 
  unwarranted, 
  for 
  its 
  prolongation 
  north 
  of 
  the 
  lake 
  

   is 
  across 
  a 
  great 
  drift 
  area, 
  without 
  rock 
  in 
  place. 
  The 
  form 
  of 
  the 
  

   trough 
  is 
  different 
  in 
  no 
  important 
  particular 
  from 
  valleys 
  of 
  evi- 
  

   dent 
  erosion 
  in 
  non-glaciated 
  regions." 
  

  

  The 
  next 
  is 
  Johnson's 
  opinion, 
  in 
  which 
  he 
  says 
  — 
  

  

  '^ 
  " 
  That 
  these 
  lake 
  basins 
  were 
  excavated 
  by 
  glacial 
  action, 
  seems 
  

   almost 
  self-evident, 
  and 
  is, 
  indeed, 
  almost 
  universally 
  admitted. 
  

  

  a 
  Am. 
  nat.. 
  Vol. 
  11, 
  1877, 
  p. 
  49-51 
  

  

  6Proc. 
  Am. 
  phil. 
  soc. 
  Vol. 
  19, 
  1881, 
  p. 
  333 
  

  

  c 
  Proc. 
  Boston 
  soc. 
  nat. 
  hist. 
  Vol. 
  21, 
  1882, 
  p. 
  359 
  

  

  d 
  Ad. 
  N. 
  Y, 
  acad. 
  sci. 
  Vol. 
  2., 
  1882, 
  p. 
  260 
  

  

  