﻿GEOLOGY 
  OF 
  WASHINGTON, 
  WARRFN 
  COUNTIES, 
  ETC. 
  511 
  

  

  Series 
  2. 
  Crystalline 
  limestones, 
  ophicalcites, 
  black 
  horn- 
  

   blendic 
  and 
  pyroxenic 
  schists 
  and 
  thinly 
  foliated 
  garnetiferous 
  

   gneisses. 
  Rocks 
  regarded 
  as 
  quartzites 
  are 
  also 
  frequently 
  

   associated. 
  They 
  exhibit 
  quartz 
  and 
  augite 
  with 
  rather 
  charac- 
  

   teristic 
  brownish 
  yellow 
  titanite. 
  

  

  Series 
  2a. 
  Pronounced 
  quartzites, 
  with 
  more 
  or 
  less 
  graphite 
  

   and 
  usually 
  with 
  some 
  garnets, 
  and 
  minor 
  accessory 
  minerals, 
  

   constituting 
  the 
  " 
  South 
  Bay 
  type." 
  

  

  Series 
  3. 
  Dark 
  basic 
  gabbros, 
  often 
  passing 
  into 
  amphibolites 
  

   from 
  shearing. 
  They 
  form 
  dikes 
  and 
  minor 
  intrusions, 
  cutting 
  

   all 
  the 
  above. 
  

  

  Series 
  4. 
  Paleozoic 
  sediments, 
  including 
  the 
  Potsdam 
  sand- 
  

   stone, 
  the 
  Calciferous 
  limestone, 
  the 
  Trenton 
  limestone 
  and 
  the 
  

   Utica 
  slate. 
  

  

  Series 
  5. 
  Trap 
  dikes 
  which 
  may 
  be 
  in 
  part 
  or 
  whole, 
  Pre- 
  

   cambrian 
  porphyries 
  are 
  not 
  met 
  in 
  the 
  area 
  here 
  described. 
  

  

  Series 
  6. 
  Glacial 
  and 
  post-glacial 
  gravels, 
  sands 
  and 
  clays. 
  

   Of 
  these 
  special 
  attention 
  has 
  been 
  only 
  given 
  to 
  the 
  Champlain 
  

   clays. 
  

  

  Local 
  geology 
  by 
  counties 
  and 
  towns 
  

  

  WASHINGTON 
  CO. 
  

  

  The 
  towns 
  will 
  be 
  taken 
  up 
  in 
  the 
  following 
  order, 
  beginning 
  

   on 
  the 
  north, 
  Putnam, 
  Dresden, 
  Whitehall 
  and 
  Fort 
  Ann. 
  A 
  

   small 
  area 
  of 
  crystallines 
  remains 
  to 
  be 
  mapped 
  in 
  the 
  southern 
  

   part 
  of 
  the 
  county. 
  a 
  All 
  the 
  eastern 
  part 
  of 
  Washington 
  co. 
  is 
  

   formed 
  by 
  the 
  paleozoics, 
  but 
  we 
  have 
  given 
  them 
  but 
  slight 
  at- 
  

   tention 
  as 
  they 
  have 
  already 
  been 
  outlined 
  by 
  Charles 
  D. 
  Wal- 
  

   cott, 
  6 
  whose 
  results 
  have 
  been 
  incorporated 
  in 
  the 
  state 
  map. 
  

  

  Putnam 
  

  

  Topography. 
  Putnam 
  township 
  lies 
  on 
  the 
  high 
  ridge 
  between 
  

   Lake 
  Champlain 
  and 
  Lake 
  George. 
  It 
  is 
  practically 
  a 
  rocky 
  

   neck, 
  steeper 
  on 
  the 
  side 
  toward 
  Lake 
  George 
  than 
  on 
  the 
  one 
  

  

  a 
  This 
  was 
  mapped 
  by 
  B. 
  F. 
  Hill 
  in 
  1898 
  and 
  will 
  be 
  described 
  in 
  the 
  next 
  annual 
  report. 
  

   b 
  Charles 
  D. 
  Walcott. 
  Taconic 
  system 
  of 
  Emmons, 
  and 
  the 
  use 
  of 
  the 
  name 
  Taconic 
  in 
  geologic 
  

   nomenclature. 
  Amer. 
  jour. 
  sci. 
  Mar. 
  18S8, 
  p. 
  229, 
  Ap. 
  p. 
  307, 
  May, 
  p. 
  394. 
  Plate 
  2, 
  after 
  p. 
  346. 
  

  

  