﻿yS 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  interesting 
  questions 
  for 
  the 
  future 
  to 
  develop. 
  As 
  to 
  the 
  course 
  

   of 
  the 
  western 
  limb, 
  when 
  prolonged 
  beyond 
  the 
  workings 
  as 
  yet 
  

   opened 
  up, 
  it 
  is 
  probably 
  faulted 
  upward 
  in 
  the 
  Old 
  Bed- 
  Welch 
  ore 
  

   bodies. 
  That 
  is, 
  it 
  probably 
  flattens, 
  encounters 
  the 
  fault 
  shown 
  

   in 
  sections 
  13 
  and 
  14, 
  is 
  thrown 
  upward 
  and 
  constitutes 
  the 
  Old 
  

   Bed-Welch 
  ore 
  body 
  with 
  all 
  the 
  convolutions 
  of 
  the 
  latter. 
  If 
  we 
  

   turn 
  to 
  section 
  10 
  in 
  which 
  Old 
  Bed 
  was 
  followed 
  up 
  to 
  the 
  fault 
  

   line, 
  at 
  about 
  the 
  level 
  of 
  940 
  feet, 
  we 
  can 
  see 
  that 
  in 
  order 
  to 
  allow 
  

   the 
  western 
  limb 
  of 
  " 
  2 
  1 
  " 
  to 
  flatten 
  and 
  come 
  over 
  to 
  the 
  fault, 
  there 
  

   must 
  be 
  a 
  displacement 
  of 
  at 
  least 
  300 
  feet. 
  If 
  the 
  western 
  limb 
  of 
  

   "21 
  " 
  rolls 
  upward 
  to 
  the 
  fault 
  this 
  throw 
  will 
  be 
  diminished. 
  We 
  

   must 
  not 
  assume 
  a 
  purely 
  vertical 
  throw, 
  since 
  increasing 
  expe- 
  

   rience 
  brings 
  home 
  tous 
  the 
  conviction 
  that 
  almost 
  always 
  faults 
  

   involve 
  a 
  diagonal 
  shift 
  along 
  the 
  fault 
  plane. 
  

  

  Assuming 
  therefore 
  that 
  Old 
  Bed 
  and 
  Welch 
  are 
  the 
  same 
  ore 
  

   body 
  and 
  are 
  the 
  faulted 
  representative 
  of 
  the 
  western 
  limb 
  of 
  

   "21 
  ", 
  an 
  assumption 
  which 
  is 
  corroborated 
  by 
  the 
  similarity 
  of 
  

   the 
  ores, 
  we 
  may 
  /follow 
  out 
  the 
  curious 
  convolutions 
  presented 
  

   by 
  them. 
  In 
  sections 
  14 
  and 
  15 
  they 
  are 
  very 
  indefinite 
  and 
  are 
  

   mostly 
  known 
  by 
  drill 
  cores. 
  The 
  stray 
  ore 
  body 
  shown 
  in 
  No. 
  15, 
  

   on 
  the 
  center 
  line, 
  was 
  revealed 
  by 
  a 
  drill 
  hole. 
  Its 
  identity 
  is 
  not 
  

   known. 
  The 
  other 
  one 
  in 
  No. 
  14, 
  east 
  of 
  the 
  fault 
  and 
  200 
  feet 
  

   below 
  the 
  Tefft 
  shaft 
  is 
  also 
  of 
  uncertain 
  relationships. 
  Old 
  Bed 
  

   is 
  first 
  recognizable 
  in 
  this 
  section, 
  although 
  little 
  is 
  accurately 
  

   known 
  about 
  it. 
  The 
  ore 
  grew 
  small 
  as 
  followed 
  many 
  years 
  ago 
  

   and 
  the 
  workings 
  were 
  abandoned. 
  In 
  No. 
  13 
  Old 
  Bed 
  was 
  found 
  

   double, 
  but 
  again 
  was 
  not 
  extensively 
  opened. 
  We 
  know 
  little 
  

   about 
  it. 
  In 
  No. 
  12 
  it 
  develops 
  a 
  steplike 
  roll 
  of 
  its 
  own 
  and 
  is 
  cut 
  

   into 
  two 
  parts, 
  by 
  the 
  small 
  fault 
  into 
  which 
  the 
  trap 
  dike 
  has 
  

   forced 
  its 
  way. 
  At 
  No. 
  11 
  the 
  dike 
  has 
  pinched 
  out 
  and 
  the 
  fault 
  

   was 
  not 
  noted. 
  The 
  ore 
  is 
  anvil-shaped 
  and 
  curiously 
  pinched 
  

   below. 
  In 
  No. 
  10 
  it 
  is 
  a 
  reversed 
  S-shaped 
  fold 
  and 
  the 
  core 
  of 
  

   rock 
  begins 
  to 
  manifest 
  itself 
  on 
  the 
  west, 
  which 
  is 
  of 
  great 
  impor- 
  

   tance 
  in 
  the 
  next 
  sections. 
  It 
  is 
  similar 
  to 
  the 
  ones 
  in 
  the 
  Joker- 
  

   Bonanza 
  " 
  21 
  " 
  fold, 
  but 
  dips 
  west 
  instead 
  of 
  east. 
  It 
  rises 
  toward 
  

   the 
  surface 
  and 
  ultimately 
  cuts 
  off 
  Old 
  Bed 
  proper, 
  from 
  its 
  down- 
  

   ward 
  prolongation, 
  the 
  Welch 
  bed, 
  until 
  finally 
  beyond 
  No. 
  6, 
  Old 
  

   Bed 
  runs 
  out 
  into 
  the 
  air 
  and 
  is 
  lost. 
  Meantime 
  the 
  Welch 
  limb 
  

   runs 
  along 
  and 
  rises, 
  with 
  a 
  lima 
  bean 
  pod 
  cross-section 
  until 
  it 
  too 
  

   goes 
  into 
  the 
  air. 
  Within 
  the 
  last 
  year 
  or 
  two 
  a 
  new 
  shaft 
  has 
  been 
  

   sunk 
  to 
  tap 
  the 
  Welch 
  ore 
  on 
  the 
  line 
  of 
  section 
  No. 
  1, 
  so 
  that 
  we 
  

  

  