﻿104 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Many 
  of 
  the 
  existing 
  Adirondack 
  lakes 
  were 
  formerly 
  of 
  larger 
  

   extent 
  as 
  proved 
  by 
  delta 
  deposits 
  above 
  the 
  present 
  lake 
  levels. 
  

   Two 
  lakes 
  of 
  this 
  class 
  recently 
  coming 
  under 
  the 
  writer's 
  observa- 
  

   tion 
  are 
  Schroon 
  lake 
  in 
  Warren-Essex 
  counties, 
  and 
  Piseco 
  lake 
  

   in 
  Hamilton 
  county. 
  The 
  water 
  of 
  Schroon 
  lake 
  was 
  once 
  fully 
  

   70 
  feet 
  higher 
  when 
  it 
  extended 
  some 
  eight 
  or 
  ten 
  miles 
  farther 
  

   up 
  the 
  Schroon 
  river, 
  with 
  a 
  branch 
  reaching 
  over 
  the 
  area 
  of 
  the 
  

   present 
  Paradox 
  lake, 
  and 
  also 
  for 
  some 
  six 
  or 
  eight 
  miles 
  farther 
  

   southward 
  to 
  cover 
  all 
  the 
  lowland 
  around 
  Chestertown, 
  and 
  with 
  

   a 
  prominent 
  branch 
  extending 
  over 
  the 
  area 
  of 
  the 
  present 
  Brant 
  

   lake. 
  Piseco 
  lake 
  was 
  at 
  one 
  time 
  clearly 
  twenty 
  feet 
  higher, 
  and 
  

   then 
  extended 
  several 
  miles 
  farther 
  northward. 
  

  

  The 
  valley 
  of 
  Lake 
  Champlain 
  was 
  favorably 
  situated 
  for 
  ice 
  

   erosion, 
  and 
  it 
  bears 
  evidence 
  of 
  having 
  been 
  vigorously 
  glaciated 
  

   though 
  it 
  has 
  not 
  been 
  proved 
  that 
  the 
  existing 
  closed 
  basin 
  is 
  

   chiefly 
  due 
  to 
  ice 
  erosion. 
  At 
  the 
  close 
  of 
  the 
  Ice 
  age, 
  tide 
  water 
  

   entered 
  the 
  valley. 
  The 
  present 
  lake 
  basin 
  is 
  due 
  principally 
  to 
  a 
  

   combination 
  of 
  late 
  elevation 
  of 
  the 
  land, 
  with 
  greater 
  uplift 
  on 
  

   the 
  north; 
  heavy 
  glacial 
  accumulations 
  toward 
  the 
  north; 
  and 
  

   possibly 
  some 
  deepening 
  as 
  a 
  result 
  of 
  ice 
  erosion. 
  

  

  Lake 
  George 
  is 
  justly 
  famous 
  because, 
  from 
  the 
  standpoint 
  of 
  

   length 
  and 
  depth 
  in 
  proportion 
  to 
  width, 
  no 
  other 
  lake 
  in 
  the 
  State 
  

   occupies 
  such 
  a 
  remarkable 
  depression. 
  This 
  depression 
  has 
  been 
  

   determined 
  by 
  ordinary 
  erosion 
  along 
  lines 
  of 
  prominent 
  faults. 
  

   There 
  was 
  a 
  preglacial 
  divide 
  where 
  the 
  " 
  Narrows 
  " 
  are 
  now 
  

   located, 
  and 
  this 
  divide 
  appears 
  to 
  have 
  been 
  considerably 
  lowered 
  

   by 
  ice 
  erosion 
  when 
  part 
  of 
  the 
  Champlain 
  ice 
  lobe 
  plowed 
  its 
  way 
  

   through 
  the 
  deep, 
  narrow 
  valley. 
  The 
  waters 
  are 
  now 
  held 
  in 
  by 
  

   glacial 
  deposits 
  at 
  each 
  end. 
  

  

  In 
  southeastern 
  New 
  York, 
  from 
  the 
  Connecticut 
  state 
  line 
  west- 
  

   ward 
  to 
  the 
  southern 
  Catskills 
  in 
  Sullivan 
  county, 
  there 
  are 
  many 
  

   lakes, 
  though 
  all 
  are 
  comparatively 
  small. 
  With 
  few 
  exceptions 
  

   these 
  lakes 
  appear 
  to 
  be 
  of 
  the 
  usual 
  drift 
  dam 
  type. 
  Greenwood 
  

   lake, 
  at 
  an 
  altitude 
  of 
  621 
  feet 
  and 
  passing 
  from 
  Orange 
  county 
  

   across 
  the 
  state 
  line 
  into 
  New 
  Jersey, 
  is 
  the 
  largest 
  in 
  this 
  part 
  of 
  

   the 
  State. 
  Three 
  small 
  lakes 
  near 
  the 
  summit 
  of 
  Shawangunk 
  

   mountain, 
  and 
  close 
  to 
  its 
  eastern 
  edge, 
  deserving 
  special 
  mention 
  

   are: 
  Mohonk, 
  Minnewaska, 
  and 
  Awosting. 
  Mohonk 
  lake, 
  which 
  

   is 
  so 
  widely 
  known 
  both 
  because 
  of 
  its 
  remarkable 
  situation 
  and 
  

   as 
  a 
  place 
  where 
  so 
  many 
  peace 
  conferences 
  have 
  been 
  held, 
  may 
  be 
  

   taken 
  as 
  the 
  type 
  of 
  the 
  three. 
  The 
  altitude 
  of 
  this 
  lake 
  is 
  more 
  

   than 
  1200 
  feet 
  or 
  about 
  1000 
  feet 
  above 
  the 
  base 
  of 
  the 
  mountain 
  

  

  