﻿520 
  

  

  NEW 
  YORK 
  STAT© 
  MUSEUM 
  

  

  quartzose 
  rock 
  about 
  one 
  foot 
  thick 
  and 
  resembling 
  a 
  sheet 
  of 
  

   sheared, 
  quartz-porphyry, 
  cuts 
  the 
  foliation 
  of 
  the 
  gneisses 
  and 
  

   extends 
  for 
  about 
  100 
  yards. 
  It 
  is 
  an 
  extremely 
  persistent 
  sheet 
  

   and 
  is 
  illustrated 
  for 
  a 
  portion 
  of 
  its 
  extent 
  by 
  fig. 
  3. 
  There 
  is 
  

   little 
  question 
  that 
  it 
  was 
  originally 
  a 
  pegmatite 
  dike 
  that 
  is 
  

   now 
  sheared 
  and 
  pinched 
  in 
  with 
  the 
  gneisses. 
  The 
  minerals 
  

   present 
  are 
  chiefly 
  quartz, 
  orthoclase 
  and 
  tourmaline. 
  

  

  Sheared 
  dike, 
  supposed 
  to 
  be 
  pegmatite, 
  on 
  northwestern 
  shore, 
  South 
  bay, 
  Dresden. 
  

  

  Series 
  6. 
  The 
  glacial 
  drift 
  is 
  wide 
  spread 
  over 
  the 
  town. 
  It 
  

   may 
  be 
  assumed 
  to 
  be 
  generally 
  present 
  in 
  the 
  depressions. 
  

   Recognizable 
  striae 
  were 
  noted 
  just 
  south 
  of 
  Snody 
  dock, 
  with 
  

   a 
  bearing 
  N 
  60 
  E. 
  While 
  the 
  grooving 
  is 
  in 
  the 
  same 
  general 
  

   direction 
  as 
  those 
  noted 
  in 
  Putnam, 
  the 
  ice 
  had 
  swung 
  around 
  

   more 
  to 
  the 
  southwest 
  in 
  its 
  advance 
  at 
  this 
  point. 
  

  

  The 
  Champlain 
  clays 
  fill 
  all 
  the 
  embayments 
  and 
  fringe 
  the 
  

   rocky 
  ridges 
  along 
  the 
  Lake 
  Champlain 
  front. 
  They 
  form 
  ter- 
  

   races 
  similar 
  to 
  those 
  noted 
  in 
  Putnam. 
  No 
  fossils 
  were 
  observed 
  

  

  in 
  them. 
  

  

  Whitehall 
  

  

  Topography. 
  Whitehall 
  contains 
  two 
  parts 
  much 
  contrasted 
  

   in 
  topography 
  and 
  geology. 
  The 
  western 
  third 
  of 
  the 
  town 
  con- 
  

   sists 
  of 
  the 
  crystalline 
  rocks, 
  which 
  form 
  the 
  eastern 
  half 
  

   of 
  a 
  high 
  ridge, 
  lying 
  between 
  Wood 
  creek 
  and 
  the 
  Met- 
  

   tawee 
  river, 
  the 
  inlets 
  of 
  Lake 
  Champlain, 
  on 
  the 
  east; 
  and 
  the 
  

   southern 
  prolongation 
  of 
  South 
  bay 
  on 
  the 
  west. 
  The 
  latter 
  is 
  

   a 
  deep 
  valley, 
  and 
  forms 
  a 
  striking 
  topographical 
  feature 
  whose 
  

   development 
  is 
  involved 
  in 
  the 
  early 
  drainage 
  relations. 
  It 
  only 
  

   concerns 
  Whitehall 
  in 
  the 
  portion 
  filled 
  by 
  the 
  South 
  bay 
  itself 
  

   and 
  in 
  this 
  the 
  steep 
  cliffs 
  of 
  Mt 
  Diameter 
  and 
  the 
  bluffs 
  along 
  

   the 
  northwest 
  front 
  of 
  Death 
  rock 
  give 
  every 
  reason 
  for 
  believ- 
  

  

  