﻿j6 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  thinned 
  somewhat, 
  and 
  has 
  a 
  very 
  flat 
  top, 
  while 
  the 
  western 
  

   shoulder 
  has 
  narrowed. 
  It 
  is 
  very 
  near 
  the 
  point 
  where 
  the 
  Joker 
  

   shaft 
  first 
  grounded 
  in 
  the 
  ore. 
  In 
  No. 
  18. 
  the 
  upper 
  western 
  bulge 
  

   has 
  shrunk 
  still 
  more 
  and 
  the 
  eastern 
  lower 
  shoulder 
  has 
  almost 
  

   disappeared. 
  Deeper 
  mining 
  has 
  shown 
  the 
  true 
  relations 
  lower 
  

   down 
  on 
  the 
  limbs. 
  We 
  find 
  them 
  pinched 
  together, 
  so 
  as 
  to 
  

   entirely 
  circumscribe 
  the 
  horse 
  of 
  rock. 
  In 
  No. 
  18 
  also 
  the 
  

   sections 
  first 
  intersect 
  the 
  Miller 
  pit 
  as 
  a 
  small 
  end 
  of 
  what 
  soon 
  

   becomes 
  a 
  large 
  ore 
  body. 
  This 
  can 
  best 
  be 
  followed 
  up 
  by 
  itself. 
  

   In 
  No. 
  17 
  the 
  limbs 
  have 
  parted 
  again, 
  so 
  far 
  as 
  yet 
  indicated 
  

   and 
  the 
  horse 
  of 
  rock 
  has 
  widened. 
  The 
  upper 
  left-hand 
  bulge 
  

   has 
  drawn 
  in 
  a 
  little 
  more. 
  In 
  No. 
  16 
  there 
  is 
  a 
  bulge 
  in 
  the 
  

   western 
  limb, 
  low 
  down, 
  but 
  no 
  very 
  marked 
  change 
  in 
  the 
  other 
  

   parts. 
  In 
  No. 
  18 
  we 
  first 
  encounter 
  the 
  property 
  line 
  and 
  as 
  

   developments 
  have 
  not 
  been 
  extensively 
  made 
  on 
  the 
  east 
  side 
  

   the 
  data 
  are 
  not 
  yet 
  available. 
  It 
  is 
  not 
  an 
  unreasonable 
  expec- 
  

   tation 
  that 
  the 
  bulge 
  in 
  the 
  lower 
  right-hand 
  limb 
  of 
  the 
  earlier 
  

   sections 
  should 
  manifest 
  itself 
  in 
  depth 
  to 
  some 
  extent 
  in 
  the 
  as 
  

   yet 
  undeveloped 
  portions 
  to 
  the 
  north. 
  

  

  In 
  No. 
  15 
  there 
  is 
  little 
  change, 
  but 
  additional 
  data 
  as 
  gained 
  in 
  

   the 
  future 
  will 
  be 
  of 
  great 
  interest. 
  Between 
  15 
  and 
  14, 
  a 
  very 
  

   remarkable 
  change 
  takes 
  place. 
  Apparently 
  by 
  a 
  pinch 
  and 
  thrust 
  

   from 
  southeast 
  to 
  northwest 
  a 
  great 
  bulge 
  or 
  wrinkle 
  was 
  rolled 
  up 
  

   on 
  top 
  of 
  the 
  anticline 
  hitherto 
  described, 
  and 
  just 
  above 
  its 
  horse 
  

   or 
  core 
  of 
  rock. 
  The 
  old 
  anticline 
  soon 
  pinches 
  out 
  but 
  the 
  new 
  

   wrinkle 
  bulges 
  into 
  a 
  great 
  second 
  shoulder 
  or 
  roll, 
  higher 
  up 
  than 
  

   the 
  one 
  which 
  we 
  have 
  hitherto 
  followed. 
  The 
  latter 
  gradually 
  

   diminishes 
  and 
  in 
  the 
  end 
  practically 
  disappears 
  between 
  Nos. 
  12 
  

   and 
  1 
  1 
  . 
  Meantime 
  the 
  increasing 
  bulge 
  of 
  the 
  new 
  wrinkle 
  makes 
  

   the 
  noble 
  ore 
  body 
  which 
  was 
  opened 
  up 
  originally 
  in 
  the 
  Tefft 
  

   shaft 
  and 
  in 
  the 
  great 
  open 
  cut 
  of 
  the 
  " 
  21 
  " 
  pit. 
  The 
  central 
  horse 
  

   of 
  rock 
  itself 
  turns 
  up 
  to 
  the 
  vertical 
  and, 
  in 
  the 
  No. 
  13, 
  even 
  rolls 
  

   over 
  beyond 
  it. 
  All 
  these 
  features 
  appear 
  in 
  sections 
  14 
  through 
  11. 
  

   The 
  upward 
  trend 
  or 
  pitch 
  of 
  the 
  axis 
  of 
  the 
  fold 
  now 
  asserts 
  itself 
  

   strongly, 
  and 
  in 
  Nos. 
  10 
  and 
  9 
  we 
  see 
  it 
  almost 
  reach 
  the 
  surface. 
  

   Between 
  9 
  and 
  8 
  it 
  emerges 
  and 
  thereafter 
  the 
  ore 
  is 
  in 
  two 
  separate 
  

   limbs 
  which 
  run 
  through 
  No. 
  6. 
  Beyond 
  this 
  point 
  they 
  have 
  not 
  

   been 
  much 
  mined 
  in 
  recent 
  years, 
  but, 
  leaving 
  faults 
  out 
  of 
  consid- 
  

   eration, 
  we 
  should 
  expect 
  the 
  ore 
  to 
  be 
  terminated 
  only 
  by 
  the 
  

   upward 
  rise 
  of 
  the 
  original 
  outer 
  or 
  eastern 
  edge 
  of 
  the 
  great 
  sheet 
  

   of 
  magnetite. 
  This 
  edge 
  has 
  been 
  nowhere 
  reached 
  as 
  yet 
  in 
  the 
  

   deeper 
  mining 
  of 
  the 
  southern 
  sections. 
  It 
  constitutes 
  one 
  of 
  the 
  

  

  