﻿GEOLOGY 
  OF 
  WASHINGTON, 
  WARREN 
  COUNTIES, 
  ETC. 
  551 
  

  

  believed 
  that 
  we 
  have 
  the 
  boundaries 
  located 
  with 
  approximate 
  

   correctness. 
  We 
  have 
  been 
  obliged 
  to 
  work 
  with 
  maps 
  which 
  

   are 
  drawn 
  on 
  a 
  very 
  small 
  scale, 
  and 
  are 
  not 
  at 
  all 
  accurate, 
  and 
  

   as 
  the 
  region 
  is 
  a 
  heavily 
  wooded 
  one, 
  and 
  as 
  the 
  glacial 
  drift 
  

   in 
  the 
  valley 
  of 
  Cold 
  river 
  is 
  heavy, 
  outcrops 
  have 
  not 
  been 
  

   found 
  with 
  all 
  desirable 
  fulness. 
  Typical 
  anorthosite 
  was 
  met 
  at 
  

   no. 
  185 
  in 
  a 
  brook 
  coming 
  off 
  the 
  north 
  side 
  of 
  Mt 
  Santanoni. 
  The 
  

   brook 
  was 
  then 
  traced 
  down 
  to 
  Cold 
  river 
  and 
  the 
  river 
  itself 
  

   followed 
  for 
  two 
  or 
  three 
  miles 
  without 
  meeting 
  ledges 
  or 
  any 
  

   rocks 
  in 
  place. 
  The 
  predominating 
  float 
  was 
  however 
  anor- 
  

   thosite. 
  In 
  1898 
  one 
  of 
  us 
  (J. 
  F. 
  Kemp) 
  visited 
  the 
  Cheney 
  ore 
  

   bed 
  about 
  two 
  miles 
  west 
  of 
  the 
  middle 
  point 
  of 
  Lake 
  Sanford, 
  

   and 
  anorthosite 
  was 
  found 
  everywhere, 
  except 
  at 
  the 
  ore 
  bed, 
  

   where 
  gabbro 
  appears. 
  

  

  The 
  anorthosites 
  have 
  been 
  shown 
  by 
  the 
  recent 
  work 
  of 
  H. 
  P. 
  

   Cushing 
  to 
  extend 
  a 
  long 
  distance 
  into 
  Franklin 
  co. 
  and 
  to 
  con- 
  

   stitute 
  a 
  very 
  large 
  area 
  in 
  that 
  section. 
  

  

  Series 
  4-5. 
  No 
  new 
  observations 
  of 
  importance 
  have 
  been 
  ac- 
  

   cumulated 
  regarding 
  these 
  formations. 
  There 
  are 
  no 
  paleozoic 
  

   rocks 
  in 
  the 
  township. 
  No 
  new 
  dikes 
  have 
  been 
  met. 
  The 
  

   glacial 
  drift 
  is 
  widespread. 
  It 
  embraces 
  many 
  boulders 
  of 
  anor- 
  

   thosite 
  to 
  the 
  south 
  along 
  the 
  highway 
  beyond 
  the 
  Boreas 
  river, 
  

   but 
  they 
  then 
  die 
  out. 
  They 
  are 
  abundant 
  on 
  Cold 
  river 
  to 
  the 
  

   town 
  line 
  but 
  then 
  die 
  out. 
  Potsdam 
  sandstone 
  appears 
  in 
  the 
  

   drift 
  in 
  this 
  region, 
  but 
  whence 
  it 
  came 
  we 
  can 
  not 
  positively 
  

   state. 
  

  

  HAMILTON 
  CO. 
  

  

  Long 
  Lake 
  

  

  Only 
  the 
  eastern 
  half 
  of 
  this 
  town 
  has 
  been 
  studied, 
  as 
  by 
  

   arrangement 
  with 
  Prof. 
  Smyth, 
  the 
  western 
  half 
  comes 
  within 
  

   his 
  area. 
  

  

  Series 
  1. 
  Nearly 
  all 
  the 
  portion 
  traversed 
  by 
  us 
  has 
  been 
  found 
  

   to 
  be 
  gneiss 
  whose 
  chief 
  mineral 
  is 
  microperthitic 
  orthoclase. 
  

   Some 
  light-colored 
  varieties 
  like 
  171, 
  contain 
  considerable 
  quartz 
  

   and 
  but 
  few 
  dark 
  silicates, 
  those 
  that 
  are 
  visible 
  being 
  chiefly 
  

   brown 
  hornblende. 
  From 
  this 
  acidic 
  extreme 
  the 
  rocks 
  grade 
  

  

  