﻿Report 
  of 
  the 
  State 
  Geologist. 
  643 
  

  

  line 
  limestone 
  series, 
  200 
  and 
  more 
  feet 
  thick. 
  The 
  same 
  

   gabbro 
  to 
  the 
  south 
  shows 
  a 
  marked, 
  irregular 
  and 
  nearly 
  

   vertical 
  contact 
  with 
  the 
  limestone, 
  and 
  just 
  north 
  of 
  Cheever 
  

   dock 
  abuts- 
  against 
  a 
  strongly 
  brecciated 
  outcrop 
  of 
  gneiss. 
  In 
  

   section 
  GG 
  of 
  the 
  Westport 
  map, 
  the 
  gabbro 
  outlies 
  the 
  

   gneiss, 
  and 
  in 
  section 
  A 
  A 
  of 
  the 
  Lewis 
  map, 
  it 
  is 
  both 
  over 
  

   and 
  under 
  the 
  latter. 
  On 
  the 
  highway 
  from 
  Beedes 
  to 
  Euba 
  Mills 
  

   (Keene 
  map) 
  the 
  massive 
  anorthosites 
  have, 
  in 
  two 
  places, 
  inclu- 
  

   sions 
  of 
  a 
  very 
  finely 
  crystalline 
  rock 
  consisting 
  of 
  quartz, 
  orthoclase 
  

   and 
  garnets, 
  which 
  is 
  much 
  the 
  same 
  thing 
  as 
  the 
  granulites 
  of 
  

   Saxony. 
  The 
  only 
  other 
  place 
  in 
  which 
  this 
  rock 
  is 
  met 
  is 
  at 
  the 
  

   western 
  iron 
  mine 
  in 
  Keene, 
  where 
  it 
  is 
  interbedded 
  with 
  ophical- 
  

   cites. 
  (See 
  section 
  BB 
  of 
  Keene 
  map.) 
  A 
  drill 
  hole 
  was 
  sunk 
  on 
  

   the 
  east 
  side 
  of 
  Mt. 
  Tom, 
  Mineville, 
  in 
  the 
  summer 
  of 
  1893, 
  which 
  

   penetrated 
  206 
  feet 
  of 
  gravel, 
  186 
  feet 
  of 
  hornblende-orthoclase 
  

   gneiss, 
  173 
  feet 
  of 
  pyroxene-orthoclase 
  gneiss, 
  twenty-eight 
  feet 
  

   of 
  a 
  crushed 
  and 
  strained 
  quartz-plagioclase 
  aggregate, 
  with 
  very 
  

   little 
  hornblende, 
  seventeen 
  feet 
  of 
  a 
  coarser 
  variety 
  of 
  the 
  last, 
  

   with 
  some 
  orthoclase 
  and 
  considerable 
  lean 
  ore, 
  six 
  feet 
  of 
  pure 
  ore, 
  

   217 
  feet 
  of 
  gabbro 
  in 
  which 
  the 
  hole 
  stopped. 
  The 
  writer 
  is 
  

   indebted 
  to 
  Mr. 
  S. 
  B. 
  McKee, 
  engineer 
  of 
  the 
  mining 
  companies 
  

   for 
  the 
  drill 
  cores. 
  Mr. 
  F. 
  S. 
  Witherbee 
  also 
  informs 
  me 
  that 
  in 
  

   sinking 
  their 
  O'Neil 
  shaft 
  (which 
  lies 
  east 
  of 
  Barton 
  Hill) 
  they 
  

   encountered, 
  about 
  300 
  feet 
  from 
  the 
  surface, 
  a 
  three 
  feet 
  vein 
  of 
  

   magnetite 
  with 
  about 
  20 
  per 
  cent 
  Ti 
  2 
  , 
  which 
  is 
  appropriately 
  

   called 
  the 
  " 
  Humbug 
  vein," 
  while 
  near 
  it 
  and 
  lower 
  is 
  the 
  Smith 
  

   vein 
  of 
  good 
  ore. 
  Titan 
  if 
  erous 
  ores 
  are 
  invariably 
  in 
  the 
  rocks 
  

   of 
  series 
  III, 
  and 
  this 
  bed 
  indicates 
  an 
  intrusion 
  of 
  these 
  gabbros. 
  

   Both 
  these 
  occurrences 
  give 
  also 
  a 
  good 
  illustration 
  of 
  the 
  com- 
  

   plexity 
  of 
  the 
  stratigraphy, 
  especially 
  when 
  heightened 
  by 
  

   infoldings 
  and 
  stretchings. 
  

  

  D. 
  It 
  has 
  been 
  generally 
  supposed 
  that 
  the 
  dorian 
  series 
  (III) 
  

   forms 
  a 
  great 
  nucleus 
  with 
  the 
  gneisses 
  and 
  crystalline 
  limestones 
  

   on 
  the 
  flanks. 
  This 
  is 
  well 
  expressed 
  by 
  Van 
  Hise 
  in 
  the 
  quota- 
  

   tion 
  given 
  above. 
  It 
  is 
  in 
  a 
  measure 
  true, 
  that 
  we 
  have 
  a 
  

   great 
  mountain 
  group 
  around 
  Mt. 
  Marcy 
  which 
  consists 
  of 
  these 
  

   anorthosites 
  with 
  no 
  gneisses 
  yet 
  recorded 
  near. 
  But 
  as 
  we 
  leave 
  

   this 
  region 
  toward 
  the 
  east 
  and 
  north, 
  the 
  anorthosites 
  and 
  gabbro 
  

   tend 
  to 
  form 
  ridges, 
  with 
  the 
  series 
  I 
  and 
  II 
  in 
  the 
  valleys 
  and 
  

  

  