﻿74 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  paper 
  and 
  sections 
  prepared 
  in 
  1897 
  an 
  d 
  published 
  in 
  the 
  Trans- 
  

   actions 
  of 
  the 
  American 
  Institute 
  of 
  Mining 
  Engineers, 
  volume 
  

   XXVII, 
  pages 
  146-204, 
  are 
  brought 
  up 
  to 
  date 
  and 
  are 
  made 
  

   to 
  include 
  the 
  results 
  of 
  10 
  years 
  of 
  mining. 
  

  

  There 
  are 
  three 
  principal 
  and 
  separate 
  faulted 
  parts 
  of 
  one 
  great 
  

   bed, 
  viz: 
  roughly 
  from 
  north 
  to 
  south, 
  the 
  Miller, 
  the 
  Old 
  Bed 
  or 
  

   Mine 
  23 
  (the 
  first 
  discovered 
  under 
  the 
  name 
  of 
  the 
  Sanford 
  

   pit) 
  and 
  the 
  "21 
  "-Bonanza-Joker 
  continuous 
  ore 
  body, 
  the 
  chief 
  

   source 
  of 
  the 
  ore. 
  There 
  are 
  several 
  shafts 
  for 
  Old 
  Bed 
  and 
  " 
  21 
  " 
  

   (named 
  from 
  the 
  lot) 
  and 
  there 
  are 
  large 
  open 
  pits 
  as 
  well. 
  The 
  

   axis 
  of 
  the 
  fold 
  strikes 
  about 
  n. 
  30 
  e., 
  true, 
  and, 
  as 
  stated 
  pitches 
  

   south. 
  The 
  full 
  extent 
  to 
  the 
  south 
  has 
  not 
  yet 
  been 
  revealed. 
  

   The 
  sections 
  here 
  used 
  are 
  24 
  in 
  number, 
  separated 
  by 
  intervals 
  

   of 
  100 
  feet, 
  so 
  that 
  they 
  cover 
  2300 
  feet. 
  The 
  folded 
  bed 
  is 
  broken 
  

   by 
  two 
  main 
  faults 
  with 
  strike 
  a 
  little 
  more 
  northerly 
  than 
  the 
  

   axis 
  of 
  the 
  fold, 
  and 
  apparently 
  by 
  one 
  east 
  and 
  west 
  fault 
  under 
  

   the 
  skip 
  way 
  of 
  mine 
  "21." 
  At 
  least 
  two 
  trap 
  dikes 
  are 
  known, 
  

   running 
  parallel 
  with 
  the 
  main 
  faults 
  and 
  probably 
  themselves 
  

   following 
  additional 
  small 
  fault 
  lines, 
  while 
  one 
  other 
  dike 
  crosses 
  

   the 
  Joker 
  at 
  its 
  southerly 
  end 
  in 
  a 
  nearly 
  east 
  and 
  west 
  direction. 
  

   In 
  the 
  Harmony 
  mines, 
  the 
  apparent 
  prolongations 
  of 
  the 
  north 
  

   and 
  south 
  dikes 
  are 
  revealed. 
  If 
  now 
  the 
  reader 
  follows 
  the 
  

   description 
  with 
  the 
  diagrams 
  beginning 
  on 
  the 
  south 
  with 
  No. 
  24, 
  

   the 
  relationships 
  can 
  be 
  most 
  intelligibly 
  stated 
  [fig. 
  7-14]. 
  

  

  Section 
  24 
  is 
  largely 
  inferential, 
  but 
  it 
  is 
  probably 
  not 
  far 
  from 
  

   the 
  truth. 
  The 
  ore 
  is 
  a 
  steep, 
  vertical 
  anticline, 
  doubled 
  over 
  a 
  fold' 
  

   of 
  rock, 
  and 
  bulging 
  at 
  the 
  lower 
  part 
  of 
  the 
  east 
  limb. 
  In 
  No. 
  23, 
  

   which 
  is 
  more 
  fully 
  based 
  on 
  mining 
  experience, 
  a 
  great 
  swell 
  has 
  

   developed 
  in 
  the 
  eastern 
  limb, 
  and 
  a 
  tendency 
  is 
  shown 
  toward 
  a 
  

   closed 
  fold, 
  the 
  two 
  limbs 
  coming 
  almost 
  together 
  in 
  depth. 
  In 
  

   No. 
  22 
  the 
  swell 
  is 
  more 
  pronounced 
  in 
  the 
  east 
  limb, 
  and 
  a 
  curious 
  

   shoulder 
  with 
  an 
  almost 
  flat 
  top 
  has 
  been 
  revealed 
  in 
  mining. 
  The 
  

   interior 
  core 
  of 
  rock 
  shows 
  a 
  sympathetic 
  development 
  in 
  the 
  same 
  

   way. 
  A 
  smaller 
  swell 
  or 
  bulge 
  is 
  manifested 
  in 
  the 
  west 
  limb. 
  In 
  

   No. 
  21 
  the 
  swell 
  contracts 
  a 
  bit, 
  but 
  the 
  bulge 
  toward 
  the 
  upper 
  

   left 
  hand 
  begins 
  to 
  assert 
  itself, 
  which 
  is 
  thereafter 
  so 
  marked 
  a 
  

   feature, 
  and 
  is 
  apparently 
  due 
  to 
  the 
  stretching 
  of 
  a 
  wellnigh 
  viscous 
  

   mass 
  under 
  irresistible 
  compression, 
  if 
  indeed 
  the 
  rock 
  was 
  not 
  still 
  

   liquid 
  from 
  an 
  original 
  molten 
  state. 
  In 
  No. 
  20 
  this 
  upper 
  left- 
  

   hand 
  bulge 
  is 
  much 
  more 
  pronounced, 
  while 
  the 
  eastern 
  shoulder 
  is 
  

   still 
  very 
  much 
  in 
  evidence. 
  The 
  intervening 
  horse 
  of 
  rock 
  has 
  

   widened 
  appreciably. 
  In 
  section 
  1 
  9 
  the 
  upper 
  western 
  bulge 
  has 
  

  

  