﻿22 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  were 
  attributed 
  to 
  glacial 
  Avaters 
  held 
  up 
  to 
  the 
  level 
  of 
  the 
  Al- 
  

   tona 
  spillways, 
  and 
  these 
  waters 
  were 
  called 
  Lake 
  Emmons. 
  

  

  Further 
  study 
  of 
  the 
  problem 
  led 
  to 
  serious 
  doubt 
  of 
  the 
  cor- 
  

   rectness 
  of 
  these 
  views 
  concerning 
  the 
  ancient 
  waters 
  of 
  the 
  

   Champlain 
  valley, 
  and 
  specially 
  of 
  the 
  nature 
  of 
  the 
  so-called 
  

   Vermont 
  waters, 
  and 
  it 
  became 
  necessary 
  to 
  reexamine 
  the 
  

   phenomena. 
  

  

  Under 
  the 
  theory 
  holding 
  the 
  Vermont 
  waters 
  as 
  glacial 
  the 
  

   summit 
  plane 
  of 
  the 
  marine 
  waters 
  was 
  thought 
  to 
  be 
  repre- 
  

   sented 
  by 
  the 
  top 
  of 
  the 
  series 
  of 
  heavy 
  cobble 
  bars 
  about 
  Covey 
  

   hill, 
  with 
  an 
  altitude 
  of 
  525 
  feet. 
  The 
  shore 
  features 
  above 
  this 
  

   level 
  were 
  attributed 
  to 
  glacial 
  lake 
  waters. 
  This 
  view 
  was 
  ac- 
  

   cepted 
  by 
  Professor 
  Goldthwait, 
  who 
  was 
  studying 
  the 
  marine 
  

   plane 
  in 
  the 
  lower 
  St 
  Lawrence 
  valley 
  for 
  the 
  Canadian 
  Survey. 
  

  

  Several 
  considerations, 
  specially 
  the. 
  amount 
  of 
  land 
  uplift 
  in 
  

   the 
  district 
  indicated 
  by 
  the 
  Iroquois 
  outlets, 
  induced 
  the 
  belief 
  

   that 
  the 
  Covey 
  hill 
  cobble 
  ridges 
  did 
  not 
  represent 
  the 
  highest 
  

   stand 
  of 
  the 
  oceanic 
  waters, 
  and 
  that 
  the 
  " 
  Lake 
  Vermont 
  " 
  fea- 
  

   tures 
  (about 
  650 
  feet 
  at 
  Covey 
  hill) 
  were 
  also 
  produced 
  by 
  sea- 
  

   level 
  waters. 
  At 
  the 
  beginning 
  of 
  the 
  summer's 
  work 
  in 
  1912 
  a 
  

   field 
  conference 
  was 
  held 
  with 
  Professor 
  Goldthwait 
  and 
  the 
  

   features 
  on 
  a 
  part 
  of 
  the 
  Mooers 
  quadrangle 
  were 
  reviewed. 
  The 
  

   beach 
  phenomena 
  between 
  the 
  Covey 
  hill 
  bars 
  and 
  the 
  Vermont 
  

   plane 
  are 
  very 
  weak 
  in 
  that 
  district. 
  The 
  lack 
  of 
  definite 
  shore 
  

   features 
  above 
  the 
  summit 
  plane 
  of 
  the 
  Covey 
  hill 
  bars, 
  525 
  feet, 
  

   is 
  in 
  strong 
  contrast 
  with 
  the 
  heavy 
  development 
  below 
  that 
  

   plane. 
  The 
  results 
  of 
  the 
  conference 
  were 
  unfavorable 
  to 
  the 
  

   view 
  that 
  the 
  land 
  surface 
  above 
  the 
  Covey 
  hill 
  plane 
  had 
  been 
  

   slowly 
  raised 
  out 
  of 
  the 
  sea-level 
  waters, 
  like 
  the 
  slopes 
  below 
  

   that 
  plane. 
  

  

  Immediately 
  following 
  the 
  conference 
  an 
  examination 
  was 
  

   made 
  of 
  the 
  phenomena 
  on 
  the 
  territory 
  south 
  of 
  the 
  Mooers 
  

   quadrangle, 
  the 
  newly 
  surveyed 
  Dannemora 
  quadrangle, 
  taking 
  

   advantage 
  of 
  an 
  advance 
  copy 
  of 
  the 
  unpublished 
  Dannemora 
  

   sheet. 
  A 
  very 
  unexpected 
  and 
  surprising 
  display 
  of 
  shore 
  features 
  

   was 
  discovered. 
  It 
  was 
  found 
  that 
  south 
  of 
  the 
  Mooers 
  quad- 
  

   rangle 
  the 
  Covey 
  hill 
  shore 
  features 
  are 
  almost 
  wanting, 
  being 
  

   replaced 
  in 
  the 
  vertical 
  position 
  by 
  a 
  deluge 
  of 
  sand. 
  But 
  rang- 
  

   ing 
  above 
  the 
  Covey 
  hill 
  plane 
  is 
  a 
  remarkable 
  development 
  of 
  

   beach 
  and 
  delta 
  features, 
  reaching 
  up 
  to 
  700 
  feet. 
  The 
  strongest 
  

   display 
  of 
  the 
  cobble 
  bars 
  represents 
  the 
  " 
  Vermont 
  " 
  plane, 
  here 
  

  

  