﻿2 
  ECONOMICAL 
  GEOLOGY. 
  

  

  lower 
  Carboniferous 
  series 
  of 
  limestones, 
  sandstones, 
  shales, 
  etc., 
  

   having 
  thinned 
  out 
  in 
  a 
  northerly 
  direction 
  before 
  reaching 
  the 
  

   southern 
  borders 
  of 
  that 
  county. 
  

  

  The 
  Devonian 
  limestone 
  in 
  tins 
  county 
  presented 
  an 
  uneven 
  sur- 
  

   face 
  for 
  the 
  reception 
  of 
  the 
  overlying 
  coal 
  deposits, 
  and 
  conse- 
  

   quently 
  the 
  coal 
  itself 
  was 
  not 
  found 
  of 
  uniform 
  thickness, 
  being 
  

   often 
  much 
  thicker 
  in 
  the 
  depressions 
  of 
  the 
  limestone 
  than 
  else- 
  

   where, 
  and 
  sometimes 
  giving 
  out 
  altogether 
  on 
  the 
  higher 
  portions 
  

   of 
  the 
  underlying 
  beds. 
  This 
  has 
  made 
  the 
  business 
  of 
  prospecting 
  

   for 
  coal 
  in 
  this 
  county 
  rather 
  precarious 
  for 
  some 
  years, 
  and 
  led 
  to 
  

   the 
  expenditure 
  of 
  a 
  considerable 
  amount 
  of 
  capital 
  tbat 
  has 
  yielded 
  

   no 
  adequate 
  return. 
  

  

  But 
  it 
  is 
  clear, 
  as 
  these 
  experiments 
  show, 
  that 
  the 
  main 
  deposit 
  

   of 
  coal 
  in 
  this 
  county 
  is 
  now 
  well 
  nigh 
  exhausted, 
  and 
  prospectors 
  

   will 
  do 
  well 
  to 
  turn 
  their 
  attention 
  to 
  the 
  counties 
  lying 
  to 
  the 
  east- 
  

   ward, 
  where 
  the 
  higher 
  seams 
  may 
  be 
  found. 
  

  

  For 
  the 
  benefit 
  of 
  those 
  who 
  may 
  not 
  have 
  access 
  to 
  the 
  preceed- 
  

   ing 
  volumes 
  of 
  these 
  reports, 
  the 
  following 
  condensed 
  section 
  of 
  the 
  

   Coal 
  Measures 
  of 
  this 
  State 
  is 
  here 
  inserted. 
  

  

  180 
  to 
  200 
  feet. 
  

  

  Sandstone 
  and 
  shale 
  with 
  a 
  six 
  inch 
  seam 
  of 
  coal. 
  

  

  Coal 
  No. 
  16—134 
  to 
  3 
  feet 
  

  

  Sandstone 
  and 
  Bhale. 
  

  

  OoalNo.16— 
  1 
  ton 
  1 
  ... 
  feet 
  

  

  Sandstone 
  and 
  Bhale. 
  

  

  Coal 
  No. 
  14-1 
  54 
  to 
  2 
  feet 
  

  

  Sandstone 
  and 
  Bhale. 
  

  

  Coal 
  No. 
  13— 
  to 
  :i 
  fret. 
  

  

  Sandstone 
  and 
  Bhale. 
  

  

  Coal 
  No. 
  VI 
  — 
  to 
  1 
  fool 
  

  

  75 
  to 
  li" 
  1 
  fi 
  

  

  50 
  to 
  CO 
  feet. 
  

  

  80 
  to 
  90 
  feet. 
  

  

  ?i 
  to 
  80 
  feel 
  

  

  •jii 
  to 
  26 
  feet. 
  

  

  Shales 
  and 
  limestone. 
  

  

  Coal 
  No 
  li 
  H 
  to 
  1 
  foot 
  

  

  i 
  io 
  feel 
  

  

  Shales. 
  

  

  < 
  Soal 
  No 
  i<< 
  to 
  1 
  loot 
  

  

  -ii 
  to 
  90 
  tee) 
  

  

  Sandstone, 
  Bhales 
  and 
  limestone. 
  

  

  Coal 
  No. 
  9 
  tO 
  9 
  fort. 
  

  

  tone, 
  shale 
  and 
  limestone. 
  

   Coal 
  No. 
  s 
  i 
  to 
  S 
  feet 
  

   Bandstone, 
  shale 
  and 
  limestone. 
  

  

  Goal 
  No. 
  : 
  l 
  to 
  9 
  feet 
  

   Sandstone, 
  shale 
  and 
  Umesl 
  

   Coal 
  N 
  foot. 
  

  

  00 
  tO 
  70 
  '■■ 
  

  

  BO 
  to 
  i"" 
  reet 
  

  

  •jip 
  to 
  80 
  f- 
  

  

  

  