﻿664= 
  Fort 
  r- 
  seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  The 
  excessively 
  gneissoid 
  phases 
  are 
  found 
  on 
  the 
  north, 
  and 
  

   their 
  puzzling 
  character 
  has 
  already 
  been 
  referred 
  to. 
  

  

  Series 
  IV. 
  No 
  palaeozoic 
  sediments 
  are 
  found. 
  

  

  Series 
  V. 
  Diabase 
  or 
  related 
  dikes 
  are 
  occasionally 
  met. 
  There 
  

   is 
  one 
  at 
  the 
  falls 
  above 
  Keene 
  Center, 
  that 
  forms 
  the 
  channel 
  of 
  

   the 
  river 
  for 
  a 
  way. 
  There 
  are 
  others 
  down 
  which 
  the 
  cascade, 
  

   at 
  Cascadeville, 
  comes 
  tumbling. 
  Evidences 
  of 
  small 
  ones 
  are 
  now 
  

   and 
  then 
  seen 
  still 
  in 
  remaining 
  boulders. 
  They 
  occur 
  as 
  well 
  in 
  

   the 
  northern 
  limestone 
  area. 
  

  

  Series 
  VI 
  The 
  central 
  valley 
  is 
  well 
  covered 
  with 
  drift. 
  It 
  

   may 
  have 
  been 
  an 
  old 
  lake 
  bottom 
  for 
  a 
  time. 
  Fragments 
  of 
  

   terraces 
  suggest 
  it. 
  

  

  Mines. 
  — 
  The 
  Weston 
  or 
  Wood 
  iron 
  mine, 
  and 
  the 
  neighboring 
  

   Hale 
  mine 
  are 
  the 
  only 
  ones 
  of 
  any 
  moment. 
  Their 
  geological 
  rela- 
  

   tions 
  have 
  already 
  been 
  mentioned. 
  They 
  have 
  not 
  been 
  operated 
  

   since 
  1880 
  and 
  probably 
  never 
  will 
  be 
  again. 
  The 
  ore 
  body 
  at 
  Cas- 
  

   cadeville 
  is 
  extremely 
  inaccessible, 
  and 
  being 
  in 
  anorthosite 
  

   would 
  probably 
  prove 
  titaniferous. 
  It 
  is 
  lean 
  and 
  limited. 
  

  

  North 
  Elba. 
  

  

  Series 
  I. 
  A 
  somewhat 
  doubtful 
  area 
  of 
  these 
  rocks 
  appears 
  

   along 
  the 
  west 
  branch 
  of 
  the 
  Ausable 
  river 
  in 
  the 
  southern 
  

   approach 
  to 
  Wilmington 
  notch. 
  The 
  rocks 
  are 
  strongly 
  gneissic, 
  

   and 
  in 
  section 
  are 
  seen 
  to 
  contain 
  much 
  quartz, 
  untwinned 
  feld- 
  

   spar, 
  often 
  coarsely 
  microperthitic, 
  and 
  green 
  pyroxene. 
  They 
  

   may 
  be 
  an 
  abnormal, 
  quartzose 
  phase 
  of 
  series 
  III. 
  Series 
  III 
  

   forms 
  the 
  Whiteface 
  ridge 
  to 
  the 
  west 
  and 
  the 
  mountains 
  on 
  the 
  

   east. 
  Outside 
  the 
  township, 
  at 
  the 
  waterfall 
  in 
  Wilmington 
  

   notch, 
  there 
  is 
  red 
  granite. 
  Undoubted 
  gneisses 
  just 
  enter 
  the 
  

   northwest 
  corner 
  near 
  Saranac, 
  but 
  the 
  country 
  is 
  generally 
  

   buried 
  under 
  sand 
  and 
  few 
  exposures 
  appear. 
  

  

  Series 
  II 
  No 
  trace 
  of 
  this 
  series 
  was 
  met. 
  

  

  Series 
  III. 
  The 
  anorthosites 
  cover 
  nearly 
  the 
  entire 
  township, 
  

   the 
  only 
  certain 
  exception 
  being 
  on 
  the 
  northwest. 
  To 
  the 
  

   south 
  the 
  main 
  peaks 
  of 
  the 
  Adirondacks 
  just 
  cross 
  the 
  town 
  

   line, 
  and 
  Mt. 
  Mclntyre, 
  which 
  is 
  second 
  to 
  Mt. 
  Marcy 
  in 
  height, 
  

   is 
  within 
  the 
  limits 
  of 
  North 
  Elba. 
  These 
  great 
  hills 
  are 
  

   massive 
  anorthosite, 
  quite 
  richly 
  feldspathic 
  and 
  not 
  containing 
  

   many 
  dark 
  silicates. 
  Garnets 
  are 
  occasional, 
  but 
  are 
  most 
  

  

  