﻿12 
  ECONOMICAL 
  GEOLOGY. 
  

  

  place, 
  but 
  it 
  probably 
  belongs 
  somewbere 
  in 
  No. 
  2 
  of 
  the 
  foregoing 
  

   Bection. 
  It 
  was 
  only 
  some 
  three 
  or 
  four 
  inches 
  in 
  thickness. 
  No. 
  8 
  

   of 
  tbe 
  section 
  I 
  am 
  inclined 
  to 
  regard 
  as 
  the 
  representative 
  of 
  

   No. 
  5, 
  and 
  a 
  thin 
  coal 
  occurs 
  with 
  it 
  at 
  some 
  other 
  points 
  on 
  the 
  

   northeastern 
  borders 
  of 
  the 
  coal 
  field. 
  This 
  would 
  make 
  th< 
  

   below 
  it 
  the 
  representative 
  of 
  coal 
  No. 
  1 
  of 
  the 
  general 
  section, 
  and 
  

   further 
  evidence 
  in 
  favor 
  of 
  this 
  conclusion 
  will 
  be 
  given 
  further 
  on. 
  

   The 
  quality 
  of 
  the 
  coal 
  obtained 
  in 
  the 
  vicinity 
  of 
  Lowell 
  is 
  inferior 
  

   to 
  that 
  obtained 
  from 
  the 
  Streator 
  scam, 
  and 
  also 
  much 
  inferior 
  to 
  

   that 
  afforded 
  by 
  the 
  lower 
  seam 
  in 
  the 
  shafts 
  at 
  Peru 
  and 
  LaSalle. 
  

   which 
  of 
  itself 
  is 
  an 
  indication 
  that 
  the 
  Lowell 
  coal 
  is 
  not 
  identical 
  

   with 
  that. 
  

  

  On 
  Sec. 
  24, 
  T. 
  32, 
  R. 
  2, 
  the 
  section 
  observed 
  was 
  similar 
  to 
  that 
  

   at 
  Lowell, 
  with 
  the 
  exception 
  of 
  the 
  Trenton 
  limestone, 
  which 
  is 
  

   here 
  at 
  least 
  30 
  or 
  40 
  feet 
  below 
  the 
  river 
  level, 
  the 
  intervening 
  

   space 
  being 
  occupied 
  by 
  the 
  lower 
  beds 
  of 
  the 
  Coal 
  Measures, 
  which 
  

   apparently 
  thin 
  out 
  in 
  a 
  northerly 
  direction 
  before 
  reaching 
  that 
  

   point. 
  The 
  section 
  here 
  is 
  as 
  follows 
  : 
  

  

  No.l. 
  Sandstone 
  W 
  

  

  No. 
  2. 
  Shale 
  « 
  to 
  12 
  

  

  No. 
  8. 
  Black 
  slate 
  

  

  No. 
  4. 
  Shale 
  and 
  argillaceous 
  limestone 
  4 
  

  

  No. 
  :,. 
  Black 
  Blate, 
  with 
  rock 
  bands 
  

  

  No. 
  6. 
  ci.iy 
  shalee 
  

  

  No. 
  7. 
  Covered 
  space 
  4 
  to 
  5 
  

  

  No.8. 
  Coal 
  in 
  river 
  !><'<1 
  ' 
  

  

  Forty-seven 
  feet 
  below 
  the 
  base 
  of 
  the 
  foregoing 
  seotion 
  another 
  

   Beam 
  of 
  coal, 
  30 
  inches 
  thick, 
  was 
  found 
  by 
  boring 
  at 
  this 
  point, 
  

   which 
  I 
  have 
  no 
  doubt 
  is 
  coal 
  No. 
  2 
  of 
  the 
  genera] 
  section, 
  ami 
  the 
  

   lowest 
  seam 
  in 
  the 
  shafts 
  at 
  LaSalle 
  and 
  Peru. 
  

  

  At 
  Patterson's 
  shaft, 
  on 
  Bee. 
  81, 
  T. 
  82, 
  I;. 
  :*. 
  this 
  lower 
  seam 
  is 
  

  

  worked, 
  and 
  it 
  affords 
  a 
  clean, 
  hard, 
  bright 
  coal, 
  about 
  'A 
  feet 
  thick, 
  

   overlaid 
  by 
  a 
  dove-colored 
  clay 
  shale, 
  quite 
  unlike 
  any 
  beds 
  out- 
  

   cropping 
  on 
  the 
  Vermilion, 
  either 
  above 
  or 
  below 
  this 
  point. 
  Coal 
  

   No. 
  4 
  appears 
  to 
  have 
  thinned 
  out 
  toward 
  the 
  south 
  before 
  reaching 
  

   tins 
  point, 
  while 
  No. 
  2 
  and 
  the 
  accompanying 
  Btrata 
  thin 
  out 
  in 
  the 
  

  

  opposite 
  direction, 
  so 
  that 
  there 
  is 
  no 
  representative 
  of 
  the 
  coal 
  or 
  

  

  bale 
  above 
  it 
  in 
  the 
  vicinity 
  of 
  Lowell. 
  

   At 
  Kirkpatrick'a 
  ford, 
  on 
  the 
  Vermilion, 
  we 
  met 
  with 
  the 
  firs! 
  out- 
  

   crop 
  of 
  the 
  Streator 
  coal, 
  in 
  asoending 
  thai 
  stream. 
  The 
  seotion 
  at 
  

  

  this 
  pour 
  follows 
  : 
  

  

  