﻿28 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  levels 
  are 
  found 
  to 
  the 
  westward 
  of 
  the 
  area 
  now 
  under 
  considera- 
  

   tion, 
  nearly 
  or 
  quite 
  up 
  to 
  Little 
  Falls. 
  It 
  seems 
  very 
  probable 
  that 
  

   the 
  capacity 
  of 
  stagnant 
  ice 
  to 
  maintain 
  a 
  barrier 
  has 
  been 
  greatly 
  

   underrated. 
  Such 
  ice 
  is 
  often 
  covered 
  with 
  debris. 
  The 
  streams 
  

   which 
  would 
  flow 
  over 
  it, 
  proceeding 
  from 
  a 
  recent 
  glaciated 
  region 
  

   would 
  naturally 
  be 
  so 
  overloaded 
  that 
  they 
  would 
  tend 
  to 
  aggregate 
  

   rather 
  than 
  to 
  erode. 
  No 
  spillways 
  or 
  water-swept 
  areas 
  at 
  the 
  

   proper 
  altitude 
  have 
  been 
  found 
  on 
  the 
  hill 
  flats 
  westward 
  from 
  

   Schenectady 
  although 
  some 
  search 
  has 
  been 
  made 
  for 
  them. 
  The 
  

   problem 
  demands 
  further 
  study 
  but 
  the 
  evidence 
  is 
  conclusive 
  that 
  

   lake 
  waters 
  in 
  front 
  of 
  a 
  waning 
  ice 
  tongue 
  occupied 
  a 
  long 
  section 
  

   of 
  the 
  Mohawk 
  valley 
  at 
  about 
  the 
  altitudes 
  indicated. 
  

  

  There 
  is 
  some 
  evidence 
  that 
  such 
  conspicuous 
  accumulations 
  for 
  

   example, 
  as 
  the 
  great 
  sand 
  flat 
  " 
  west 
  of 
  Fonda 
  " 
  is 
  not 
  altogether 
  

   and 
  perhaps 
  is 
  not 
  largely 
  a 
  delta 
  of 
  the 
  Cayadutta 
  creek, 
  for 
  on 
  

   the 
  very 
  borders 
  of 
  the 
  Mohawk 
  river 
  on 
  the 
  south 
  edge 
  of 
  the 
  

   lacustrine 
  accumulation 
  is 
  found 
  at 
  least 
  one 
  locality 
  cross-graveled, 
  

   dipping 
  to 
  the 
  northward, 
  whereas, 
  as 
  further 
  north 
  and 
  toward 
  

   the 
  head 
  of 
  the 
  supposed 
  delta, 
  the 
  deposits 
  are 
  silts 
  and 
  fine 
  sands. 
  

   This 
  points 
  to 
  the 
  suggestion 
  that 
  the 
  deposited 
  part 
  at 
  least 
  was 
  

   made 
  while 
  the 
  immediate 
  valley 
  of 
  the 
  Mohawk 
  was 
  occupied 
  by 
  a 
  

   remnant 
  glacier 
  from 
  which 
  these 
  gravels 
  were 
  derived. 
  

  

  Deposits 
  of 
  Lake 
  Albany 
  age. 
  The 
  waters 
  of 
  Lake 
  Albany 
  ex- 
  

   tended 
  up 
  the 
  Mohawk 
  valley. 
  The 
  writer 
  is 
  not 
  aware 
  that 
  this 
  

   fact 
  has 
  been 
  sufficiently 
  recognized, 
  but 
  by 
  consulting 
  the 
  contour 
  

   maps 
  of 
  the 
  valley 
  it 
  will 
  be 
  seen 
  that 
  the 
  waters 
  of 
  Lake 
  Albany 
  

   at 
  an 
  altitude 
  of 
  340 
  or 
  more 
  feet 
  would 
  extend 
  far 
  up 
  the 
  present 
  

   course 
  of 
  the 
  river. 
  This 
  also 
  carries 
  with 
  it 
  the 
  interesting 
  con- 
  

   clusion 
  lhat 
  the 
  Iroquois 
  drainage 
  which 
  swept 
  down 
  the 
  Mohawk 
  

   valley 
  and 
  is 
  believed 
  to 
  have 
  deposited 
  as 
  a 
  delta 
  the 
  Schenectady 
  

   and 
  Albany 
  sands, 
  must 
  have 
  been 
  a 
  drainage 
  following 
  the 
  belt 
  

   of 
  still 
  water 
  through 
  a 
  long 
  stretch 
  of 
  the 
  Mohawk 
  valley. 
  A 
  

   number 
  of 
  deposits 
  of 
  coarse 
  gravels 
  have 
  been 
  identified 
  in 
  the 
  

   area 
  as 
  probably 
  belonging 
  to 
  the 
  Lake 
  Albany 
  stage. 
  It 
  could 
  not 
  

   have 
  any 
  reference 
  to 
  the 
  present 
  or 
  recent 
  work 
  of 
  the 
  river 
  and 
  

   they 
  do 
  not 
  seem 
  to 
  belong 
  to 
  the 
  earlier 
  440 
  to 
  460 
  foot 
  stage 
  

   already 
  described. 
  Such 
  deposits 
  of 
  coarse 
  gravels 
  occur 
  down 
  at 
  

   Yosts 
  where 
  they 
  have 
  been 
  largely 
  excavated 
  by 
  the 
  New 
  York 
  

   Central 
  Railroad. 
  They 
  form 
  a 
  stone 
  ridge 
  east 
  of 
  Randall, 
  south 
  

   of 
  which 
  ridge 
  is 
  an 
  interesting 
  old 
  channel 
  of 
  the 
  river 
  waters. 
  

   They 
  occur 
  again 
  in 
  the 
  hill 
  about 
  40 
  feet 
  in 
  hight 
  which 
  extends 
  

  

  