﻿

  GEOLOGY 
  OF 
  SARATOGA 
  STRINGS 
  AND 
  VICINITY 
  II 
  

  

  similar 
  character. 
  But 
  unlike 
  the 
  shale 
  belt 
  of 
  the 
  Mohawk, 
  these 
  

   shales 
  are 
  greatly 
  deformed. 
  They 
  have 
  been 
  compressed, 
  folded 
  

   and 
  faulted, 
  and 
  show 
  steep 
  dips 
  nearly 
  everywhere, 
  instead 
  of 
  

   lying 
  flat. 
  The 
  boundary 
  between 
  the 
  two 
  shale 
  belts 
  is 
  fairly 
  

   abrupt, 
  and 
  is 
  readily 
  traced 
  across 
  the 
  Saratoga 
  district. 
  The 
  

   shales 
  of 
  the 
  Saratoga 
  quadrangle 
  are 
  the 
  undisturbed 
  shales 
  of 
  

   the 
  Mohawk 
  belt, 
  while 
  the 
  greater 
  part 
  of 
  those 
  of 
  the 
  Schuyler- 
  

   ville 
  quadrangle 
  are 
  the 
  tipped 
  shales 
  of 
  the 
  Hudson 
  valley 
  belt. 
  

   The 
  greater 
  part 
  of 
  the 
  Schuylerville 
  quadrangle 
  is 
  included 
  in 
  the 
  

   Hudson 
  lowland. 
  

  

  There 
  are 
  occasional 
  harder 
  bands 
  in 
  these 
  tipped 
  shales, 
  bands 
  

   of 
  hard 
  sandstone 
  or 
  grit 
  and 
  chert, 
  whose 
  lines 
  of 
  outcrop 
  form 
  

   low 
  ridges 
  on 
  the 
  otherwise 
  level 
  valley 
  floor. 
  Glacial 
  deposits 
  

   also 
  diversify 
  it 
  somewhat, 
  as 
  they 
  do 
  along 
  the 
  Mohawk. 
  Close 
  

   to 
  the 
  river 
  they 
  have 
  been 
  washed 
  away, 
  but 
  back 
  from 
  it 
  they 
  

   rise 
  in 
  prominent 
  benches 
  and 
  widely 
  cover 
  the 
  valley 
  floor 
  so 
  

   that 
  rock 
  outcrops 
  are 
  very 
  exceptional. 
  

  

  Two 
  hilly 
  tracts 
  of 
  land 
  rise 
  from 
  this 
  plain, 
  one 
  east 
  of 
  Sara- 
  

   toga 
  lake, 
  culminating 
  between 
  Ketchums 
  Corners 
  and 
  Quaker 
  

   Springs 
  and 
  attaining 
  the 
  600 
  feet 
  level 
  ; 
  the 
  other 
  in 
  the 
  northeast 
  

   corner 
  of 
  the 
  Schuylerville 
  sheet, 
  north 
  of 
  the 
  bend 
  in 
  the 
  Moses 
  

   kill. 
  A 
  landmark 
  in 
  the 
  broad 
  plain 
  north 
  of 
  Fish 
  creek 
  is 
  Ken- 
  

   drick's 
  hill 
  rising 
  200 
  feet 
  above 
  the 
  plain. 
  

  

  The 
  hilly 
  region 
  at 
  the 
  eastern 
  edge 
  of 
  the 
  Schuylerville 
  sheet 
  

   is 
  the 
  western 
  margin 
  of 
  a 
  plateau 
  of 
  somewhat 
  higher 
  level. 
  This 
  

   plateau 
  is 
  but 
  little 
  higher 
  than 
  the 
  Hudson 
  river 
  plain 
  ; 
  its 
  base 
  

   is 
  about 
  400 
  feet 
  above 
  sea 
  in 
  the 
  west 
  and 
  it 
  rises 
  gradually 
  to 
  

   about 
  600 
  feet 
  across 
  the 
  adjoining 
  Cambridge 
  sheet 
  to 
  the 
  eastern 
  

   edge 
  of 
  that 
  sheet, 
  where 
  another 
  somewhat 
  abrupt 
  rise 
  takes 
  place 
  

   to 
  a 
  higher 
  plateau. 
  YYe 
  will 
  call 
  this 
  lower 
  plateau, 
  which 
  is 
  about 
  

   to 
  miles 
  wide, 
  the 
  Greenwich 
  plateau. 
  It 
  can 
  be 
  traced 
  on 
  the 
  east 
  

   side 
  of 
  the 
  Hudson 
  across 
  the 
  Hoosic 
  into 
  Rensselaer 
  county 
  and 
  

   south, 
  where 
  it 
  lies 
  in 
  front 
  of 
  the 
  Rensselaer 
  plateau 
  and 
  has 
  

   been 
  fully 
  described 
  by 
  Dale. 
  1 
  This 
  plateau 
  is 
  characterized 
  by 
  its* 
  

   extremely 
  irregular 
  surface, 
  as 
  shown 
  on 
  the 
  eastern 
  edge 
  of 
  the 
  

   Schuylerville 
  sheet. 
  It 
  is 
  covered 
  with 
  a 
  great 
  number 
  of 
  more 
  

   or 
  less 
  oval 
  hillocks, 
  mostly 
  but 
  a 
  few 
  hundred 
  feet 
  high, 
  but 
  in 
  

   many 
  cases 
  rising 
  500 
  feet, 
  and 
  in 
  some 
  even 
  a 
  thousand 
  feet 
  above 
  

   the 
  plain. 
  It 
  gradually 
  approaches 
  the 
  Hudson 
  river 
  until 
  at 
  Troy 
  

  

  1 
  Dale, 
  T. 
  Nelson. 
  Geology 
  of 
  the 
  Hudson 
  Valley 
  between 
  the 
  Hoosic 
  and 
  

   the 
  Kinderhook. 
  U. 
  S. 
  Geol. 
  Surv. 
  Bui. 
  242. 
  1904. 
  

  

  