﻿REPORT 
  OF 
  THE 
  DIRECTOR 
  r99 
  

  

  The 
  progressive 
  thickening 
  of 
  the 
  till 
  and 
  the 
  proportional 
  thinning 
  

   of 
  tlie 
  underlying 
  sand 
  and 
  gravel 
  are 
  well 
  shown 
  in 
  the 
  digging 
  of 
  

   graves 
  in 
  the 
  town 
  cemetery. 
  No 
  crumpling, 
  folding 
  or 
  disturbance 
  

   of 
  any 
  kind 
  could 
  be 
  recognized 
  in 
  the 
  under 
  deposits 
  of 
  sand 
  and 
  

   grave], 
  but 
  seemingly, 
  were 
  in 
  their 
  normally 
  formed 
  condition. 
  

   The 
  thinning 
  of 
  the 
  till 
  to 
  the 
  north 
  can 
  probably 
  be, 
  explained 
  as 
  a 
  

   result 
  of 
  lake 
  modification. 
  

  

  Maximum 
  stage 
  and 
  water 
  extent. 
  The 
  Hammondsport 
  stage, 
  

   in 
  the 
  Keuka 
  lake 
  valley, 
  was 
  closed 
  about 
  the 
  time 
  that 
  Ovid 
  was 
  

   uncovered 
  by 
  the 
  ice 
  and 
  the 
  waters 
  in 
  this 
  lake 
  basin 
  were 
  added 
  

   to 
  those 
  of 
  lake 
  Newberry 
  in 
  the 
  basins 
  of 
  lakes 
  Cayuga 
  and 
  

   Seneca. 
  The 
  lower 
  lands 
  to 
  the 
  north 
  aud 
  at 
  the 
  outlet 
  portion 
  of 
  

   Kenka 
  lake 
  basin 
  were 
  uncovered 
  by 
  the 
  ice 
  about 
  the 
  same 
  time 
  

   that 
  the 
  Ovid 
  divide 
  was 
  exposed, 
  and 
  glacial 
  lake 
  Newberry 
  was 
  

   limited 
  to 
  the 
  coalesced 
  waters 
  in 
  the 
  entire 
  Keuka 
  valley 
  and 
  only 
  

   a 
  part 
  of 
  the 
  Cayuga 
  and 
  Seneca 
  valleys. 
  The 
  ice 
  still 
  occupied 
  

   the 
  northern 
  parts 
  of 
  the 
  two 
  latter 
  valleys 
  at 
  this 
  time. 
  The 
  limit 
  

   in 
  the 
  Newberry 
  waters 
  was 
  maintained 
  until 
  the 
  ice 
  again 
  changed 
  

   its 
  position 
  and 
  the 
  northern 
  portions 
  of 
  the 
  Cayuga 
  and 
  Seneca 
  

   basins 
  were 
  uncovered, 
  when 
  the 
  waters 
  of 
  glacial 
  lakes 
  Naples 
  and 
  

   Flint 
  creek 
  on 
  the 
  west, 
  and 
  of 
  glacial 
  lakes 
  Groton 
  and 
  probably 
  

   Skaneateles 
  on 
  the 
  east, 
  were 
  added. 
  The 
  maximum 
  level 
  as 
  

   well 
  as 
  the 
  extent 
  of 
  glacial 
  lake 
  Newberry, 
  was 
  thus 
  marked 
  and 
  

   held 
  until 
  the 
  ice 
  again 
  suffered 
  a 
  sufficient 
  wastage 
  northward 
  to 
  

   expose 
  a 
  lower 
  col 
  to 
  the 
  north 
  and 
  west, 
  when 
  the 
  Newberry 
  lake 
  

   abandoned 
  its 
  overflow 
  to 
  the 
  south 
  through 
  the 
  Seneca 
  valley 
  for 
  

   that 
  of 
  a 
  lower 
  level 
  to 
  the 
  northwest. 
  

  

  Other 
  terrace 
  markings 
  in 
  the 
  Keuka 
  and 
  Canandaigua 
  val- 
  

   leys. 
  Deltas, 
  not 
  given 
  in 
  the 
  table 
  of 
  terraces 
  (see 
  opposite 
  p. 
  

   r84:) 
  were 
  noted 
  at 
  the 
  following 
  places 
  in 
  the 
  Keuka 
  valley, 
  and 
  

   although 
  not 
  measured 
  were 
  taken 
  to 
  represent 
  the 
  Newberry 
  lake 
  

   level 
  : 
  on 
  the 
  west 
  side 
  of 
  the 
  lake 
  at 
  Snows 
  glen, 
  some 
  two 
  miles 
  

   north 
  of 
  Hammondsport 
  ; 
  and 
  at 
  Drakes 
  point, 
  between 
  Snows 
  glen 
  

   and 
  [Jrbana. 
  They 
  have 
  been 
  seen 
  on 
  several 
  streams 
  which 
  enter 
  

   the 
  lake 
  to 
  the 
  north 
  of 
  and 
  between 
  Urbana 
  and 
  Pulteneys, 
  and 
  are 
  

   rather 
  strongly 
  marked 
  in 
  the 
  region 
  of 
  the 
  latter 
  place, 
  about 
  eight 
  

   miles 
  north 
  of 
  Hammondsport. 
  

  

  