﻿I46 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  the 
  district 
  to 
  the 
  west; 
  that 
  it 
  was 
  uplifted 
  much 
  less 
  than 
  the 
  

   Adirondacks; 
  and 
  that 
  the 
  difference 
  in 
  amount 
  was 
  made 
  possible 
  

   by 
  additional 
  faulting, 
  the 
  easterly 
  slices 
  being 
  thrown 
  down 
  rela- 
  

   tive 
  to 
  those 
  west 
  of 
  them. 
  The 
  old 
  fault 
  scarps 
  had 
  been 
  pene- 
  

   plained, 
  along 
  with 
  the 
  rest 
  of 
  the 
  region. 
  These 
  further 
  move- 
  

   ments 
  renewed 
  them, 
  and 
  their 
  prominence 
  today 
  is 
  in 
  part 
  due 
  to 
  

   this 
  late 
  movement. 
  The 
  McGregor 
  and 
  Hoffman 
  fronts 
  of 
  the 
  

   Saratoga 
  quadrangle 
  would 
  be 
  much 
  less 
  imposing 
  than 
  they 
  are 
  

   had 
  it 
  not 
  been 
  for 
  this. 
  

  

  It 
  is 
  by 
  no 
  means 
  unlikely 
  that 
  further 
  westward 
  movement 
  of 
  

   the 
  eastern 
  basin 
  rocks 
  along 
  the 
  thrust 
  fault 
  planes 
  also 
  took 
  

   place 
  at 
  this 
  time. 
  

  

  During 
  the 
  first 
  part 
  of 
  the 
  Cenozoic, 
  the 
  Tertiary, 
  minor 
  oscilla- 
  

   tions 
  of 
  level 
  took 
  place 
  in 
  the 
  region, 
  but 
  we 
  lack 
  the 
  precise 
  

   knowledge 
  of 
  just 
  when 
  and 
  what 
  they 
  were. 
  The 
  close 
  of 
  the 
  

   Tertiary 
  was 
  a 
  time 
  of 
  additional 
  uplift, 
  considerably 
  increasing 
  

   the 
  altitude 
  of 
  the 
  region, 
  not 
  improbably 
  with 
  renewed 
  faulting. 
  

   Succeeding 
  this 
  the 
  region 
  was 
  invaded 
  by 
  the 
  ice 
  sheets 
  of 
  the 
  

   glacial 
  period. 
  

  

  PLEISTOCENE 
  HISTORY 
  1 
  

  

  Judging 
  from 
  the 
  glacial 
  history 
  of 
  other 
  parts 
  of 
  North 
  America, 
  

   the 
  Saratoga 
  region 
  was 
  probably 
  covered 
  by 
  four 
  or 
  five 
  successive 
  

   ice 
  sheets, 
  which 
  extended 
  south 
  from 
  Labrador 
  and 
  occupied 
  the 
  

   territory. 
  It 
  was 
  certainly 
  occupied 
  by 
  two 
  such 
  sheets. 
  Long 
  

   interglacial 
  periods 
  intervened 
  between 
  these 
  ice 
  sheets. 
  The 
  

   glaciers 
  interrupted 
  the 
  drainage, 
  eroded 
  the 
  region 
  somewhat, 
  and 
  

   on 
  retreat 
  left 
  it 
  cumbered 
  with 
  glacial 
  deposits. 
  

  

  There 
  were 
  also 
  oscillations 
  of 
  level 
  during 
  the 
  glacial 
  period, 
  

   with 
  loss 
  of 
  the 
  initial 
  high 
  altitude. 
  At 
  the 
  time 
  of 
  retreat 
  of 
  

   the 
  last 
  ice 
  sheet 
  the 
  altitude 
  of 
  the 
  region 
  was 
  lower 
  than 
  at 
  

   present. 
  

  

  During 
  the 
  slow, 
  northward 
  retreat 
  of 
  the 
  last 
  ice 
  sheet 
  through 
  

   the 
  Hudson 
  and 
  Champlain 
  valleys, 
  various 
  bodies 
  of 
  standing 
  

   water 
  occupied 
  parts 
  of 
  the 
  valley, 
  south 
  of 
  the 
  ice. 
  The 
  most 
  

   southerly 
  of 
  these, 
  and 
  the 
  one 
  of 
  greatest 
  importance 
  in 
  the 
  

   history 
  of 
  the 
  Saratoga 
  region, 
  is 
  known 
  as 
  Lake 
  Albany. 
  This 
  

   was 
  a 
  fresh- 
  water 
  lake 
  which 
  extended 
  as 
  far 
  scith 
  as 
  Kingston 
  

  

  1 
  Two 
  forthcoming 
  reports 
  by 
  Professors 
  Woodworth 
  and 
  Stoller 
  on 
  the 
  

   Pleistocene 
  of 
  the 
  Schuylerville 
  and 
  Saratoga 
  quadrangles 
  respectively 
  will 
  

   furnish 
  full 
  treatment 
  of 
  this 
  portion 
  of 
  the 
  geological 
  history 
  of 
  the 
  region. 
  

  

  