﻿254 
  F. 
  B. 
  Taylor 
  — 
  Niagara 
  and 
  the 
  Great 
  Lakes. 
  

  

  or 
  three 
  years 
  and 
  enough 
  facts 
  are 
  now 
  at 
  hand 
  to 
  form 
  the 
  

   basis 
  of 
  a 
  much 
  better 
  correlation. 
  

  

  The 
  highest 
  beach 
  of 
  the 
  north 
  is 
  not 
  all 
  of 
  one 
  age. 
  A 
  

   straight 
  line 
  drawn 
  through 
  Petoskej 
  and 
  Parry 
  Sound, 
  as 
  

   shown 
  on 
  the 
  map 
  by 
  AA, 
  marks 
  the 
  approximate 
  node 
  line 
  

   or 
  place 
  of 
  division 
  of 
  the 
  highest 
  beach 
  in 
  two 
  parts 
  of 
  differ- 
  

   ent 
  ages. 
  South 
  of 
  this 
  line 
  the 
  highest 
  beach 
  below 
  the 
  

   glacial 
  lake 
  beaches 
  is 
  all 
  of 
  one 
  age, 
  and 
  is 
  in 
  fact 
  Spencer's 
  

   Algonquin 
  beach. 
  North 
  of 
  the 
  line 
  the 
  highest 
  beach 
  is 
  all 
  

   of 
  another 
  age, 
  and 
  I 
  propose 
  to 
  call 
  it 
  the 
  Chippewa 
  beach.* 
  

   The 
  reasons 
  for 
  the 
  division 
  on 
  this 
  line 
  will 
  be 
  discussed 
  far- 
  

   ther 
  on. 
  

  

  The 
  Chippewa 
  beach 
  borders 
  all 
  the 
  shores 
  of 
  the 
  Great 
  

   Lakes 
  north 
  of 
  the 
  Petoskey 
  node 
  line. 
  In 
  the 
  following 
  table 
  

   its 
  altitude 
  is 
  given 
  at 
  all 
  places 
  so 
  far 
  determined. 
  The 
  

   heights 
  are 
  in 
  feet 
  above 
  sea 
  level. 
  

  

  SUPERIOR 
  BASIN. 
  

  

  Duluth, 
  Minn.f 
  (Lawson) 
  1134 
  

  

  Mt. 
  Josephine, 
  " 
  1207 
  

  

  HolyokeJ 
  (Upham) 
  1122 
  

  

  Maple 
  Ridge, 
  Wis 
  1135 
  

  

  Kimball 
  1170 
  

  

  L'Anse, 
  Mich. 
  1190 
  

  

  Marquette 
  1190 
  

  

  Sault 
  Ste. 
  Marie, 
  Ont. 
  (Lawson) 
  ...„ 
  1014 
  

  

  MICHIGAN- 
  HURON-GEORGIAN 
  BAY 
  BASIN. 
  

  

  Cook's 
  Mill, 
  Micb. 
  750 
  

  

  South 
  Bay 
  Hill 
  715 
  

  

  Burnt 
  Bluff 
  705 
  

  

  Middle 
  Munuscong 
  Island 
  860 
  

  

  Mackinac 
  785 
  

  

  Petoskey 
  680 
  

  

  Cartier, 
  Ont. 
  1200 
  

  

  Nelson's, 
  near 
  North 
  Bay 
  ... 
  1140 
  

  

  South 
  River 
  1220 
  

  

  Sundridge 
  _ 
  1205 
  

  

  Huntsville 
  1000 
  

  

  * 
  I 
  have 
  long 
  believed 
  this 
  beach 
  to 
  be 
  one 
  with 
  the 
  Iroquois 
  beach 
  of 
  the 
  

   Ontario 
  basin. 
  Reasons 
  for 
  this 
  opinion 
  will 
  be 
  set 
  forth 
  later. 
  But 
  inasmuch 
  

   as 
  this 
  supposition 
  has 
  not 
  yet 
  been 
  established 
  by 
  observations, 
  it 
  would 
  seem 
  

   premature 
  to 
  call 
  it 
  the 
  Iroquois 
  beach 
  at 
  the 
  present 
  time. 
  

  

  f 
  " 
  Sketch 
  of 
  the 
  Coastal 
  Topography 
  of 
  the 
  North 
  Side 
  of 
  Lake 
  Superior 
  with 
  

   special 
  reference 
  to 
  the 
  Abandoned 
  Strands 
  of 
  Lake 
  Warren," 
  by 
  Andrew 
  C. 
  

   Lawson, 
  Twentieth 
  Annual 
  Report, 
  Geol. 
  and 
  Nat. 
  Hist. 
  Survey 
  of 
  Minnesota. 
  

  

  X 
  Thirty 
  miles 
  southwest 
  of 
  Duluth. 
  See 
  Twenty-second 
  Report 
  Geol. 
  and 
  Nat. 
  

   Hist. 
  Survey 
  of 
  Minn., 
  Part 
  III, 
  p. 
  59. 
  

  

  