﻿FOURTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  I907 
  21 
  

  

  at 
  points 
  north 
  of 
  Burke 
  and 
  Malone. 
  Topographic 
  sheets 
  of 
  the 
  

   region 
  are 
  necessary 
  for 
  the 
  mapping. 
  

  

  The 
  sea 
  level 
  waters 
  in 
  the 
  Ontario 
  basin, 
  called 
  Gilbert 
  gulf 
  

   have 
  left 
  definite 
  shore 
  features 
  which 
  had 
  been 
  mapped 
  previous 
  

   to 
  this 
  season 
  as 
  far 
  north 
  as 
  the 
  mouth 
  of 
  Stony 
  creek, 
  3 
  miles 
  

   southwest 
  of 
  Henderson. 
  During 
  the 
  summer 
  the 
  mapping 
  has 
  

   been 
  carried 
  northeastward 
  to 
  Stone 
  Mills, 
  on 
  the 
  Theresa 
  quad- 
  

   rangle. 
  

  

  The 
  highest 
  Gilbert 
  gulf 
  bars 
  lie 
  at 
  about 
  262 
  feet 
  altitude 
  near 
  

   Texas, 
  northeast 
  of 
  Oswego, 
  where 
  the 
  water 
  plane 
  passes 
  beneath 
  

   the 
  level 
  of 
  Ontario. 
  The 
  plane 
  rises 
  to 
  the 
  north 
  so 
  that 
  the 
  

   highest 
  bar 
  is 
  325 
  feet 
  at 
  Henderson 
  Harbor; 
  375 
  feet 
  at 
  Dexter; 
  

   380 
  to 
  390 
  feet 
  at 
  Stone 
  Mills 
  and 
  Depauville 
  ; 
  and 
  about 
  400 
  feet 
  

   at 
  Clayton. 
  Along 
  the 
  nearly 
  north 
  and 
  south 
  line 
  of 
  46 
  miles 
  

   between 
  Texas 
  and 
  the 
  Hogback 
  hill, 
  4 
  miles 
  southwest 
  of 
  Clayton 
  

   the 
  average 
  rise 
  is 
  about 
  3 
  feet 
  per 
  mile. 
  With 
  the 
  assistance 
  of 
  

   Mr' 
  F. 
  A. 
  Hinds 
  of 
  Watertown 
  the 
  altitude 
  of 
  the 
  highest 
  of 
  the 
  

   strong 
  Iroquois 
  bars 
  on 
  the 
  Farr 
  place, 
  3 
  miles 
  east 
  of 
  Watertown, 
  

   was 
  determined 
  by 
  precise 
  leveling 
  as 
  733 
  feet, 
  a 
  reduction 
  of 
  7 
  

   feet 
  from 
  the 
  previous 
  aneroid 
  figures. 
  Using 
  this 
  corrected 
  alti- 
  

   tude 
  we 
  find 
  that 
  the 
  deformation 
  of 
  the 
  Iroquois 
  shore 
  in 
  the 
  

   stretch 
  between 
  Richland 
  and 
  Farr's 
  is 
  733-566-^-30 
  miles 
  = 
  5.6 
  

   feet 
  per 
  mile. 
  It 
  appears 
  therefore, 
  that 
  the 
  average 
  uplift 
  on 
  the 
  

   Iroquois 
  shore 
  in 
  this 
  region 
  is 
  nearly 
  twice 
  that 
  of 
  the 
  marine 
  

   beaches, 
  which 
  fact 
  has 
  an 
  important 
  bearing 
  on 
  the 
  time 
  relations 
  

   of 
  the 
  two 
  water 
  bodies. 
  

  

  Before 
  the 
  details 
  of 
  the 
  closing 
  stages 
  of 
  the 
  Preontarian 
  waters 
  

   can 
  be 
  advantageously 
  studied 
  and 
  the 
  dramatic 
  history 
  fully 
  written, 
  

   the 
  topographic 
  sheets 
  of 
  the 
  areas 
  northwest 
  and 
  north 
  of 
  the 
  

   Adirondacks 
  must 
  be 
  published. 
  The 
  sheets 
  more 
  specially 
  needed 
  

   for 
  this 
  study 
  are 
  the 
  four 
  along 
  the 
  State 
  boundary 
  lying 
  between 
  

   the 
  published 
  Mooers 
  and 
  Massena 
  sheets 
  ; 
  also 
  the 
  sheet 
  east 
  of 
  the 
  

   Carthage 
  sheet. 
  

  

  Aside 
  from 
  these 
  items 
  of 
  Pleistocene 
  history 
  in 
  the 
  regions 
  

   referred 
  to, 
  a 
  review 
  has 
  been 
  made 
  of 
  contemporary 
  features 
  of 
  the 
  

   Upper 
  Genesee 
  valley 
  with 
  special 
  reference 
  to 
  the 
  relations 
  of 
  the 
  

   preglacial 
  drainage 
  and 
  glacial 
  lakes 
  of 
  the 
  river 
  to 
  the 
  production 
  

   of 
  the 
  gorge 
  and 
  cataracts 
  at 
  Portage. 
  • 
  

  

  The 
  region 
  under 
  study 
  by 
  Professor 
  Brigham 
  includes 
  the 
  

   Broadalbin, 
  Gloversville, 
  Amsterdam 
  and 
  Fonda 
  quadrangles, 
  an 
  

   area 
  of 
  about 
  900 
  square 
  miles, 
  reaching 
  from 
  the 
  southern 
  Adiron- 
  

  

  