﻿1864.] 
  HULL 
  AND 
  GREEN 
  — 
  MILLSTONE- 
  GRIT. 
  245 
  

  

  Rochdale, 
  Bacup, 
  Helpet 
  Edge, 
  and 
  Dukenfield*, 
  and 
  perhaps 
  the 
  

   Great 
  Smut 
  of 
  Kerridge 
  and 
  Macclesfield. 
  

  

  2nd. 
  At 
  a 
  distance 
  of 
  from 
  40 
  to 
  64 
  yards 
  below 
  the 
  last, 
  the 
  

   Upper 
  Foot 
  Mine 
  or 
  Bullion 
  Coal, 
  having 
  a 
  black 
  shale 
  roof 
  with 
  

   calcareous 
  nodules, 
  containing 
  Goniatites 
  Listeri, 
  Aviculopecten 
  papy- 
  

   raceus, 
  &c. 
  It 
  is 
  worked 
  at 
  Burnley, 
  Rochdale, 
  Helpet 
  Edge, 
  Dog 
  

   Hill, 
  Oldham, 
  and 
  Staleybridge. 
  

  

  3rd. 
  At 
  a 
  distance 
  of 
  10 
  or 
  12 
  yards 
  below 
  the 
  Lower 
  Foot 
  comes 
  

   the 
  Gannister 
  Coal, 
  with 
  a 
  black 
  shale 
  roof, 
  and 
  a 
  floor 
  of 
  extremely 
  

   hard 
  siliceous 
  rock, 
  full 
  of 
  Stigmaria. 
  It 
  is 
  worked 
  at 
  Burnley, 
  

   Blackburn, 
  Rochdale, 
  Darwen, 
  Halliwell, 
  Bury, 
  Oldham, 
  and 
  Staley- 
  

   bridge. 
  

  

  4th. 
  Below 
  the 
  Gannister, 
  at 
  a 
  distance 
  of 
  10 
  yards, 
  lies 
  the 
  Lower 
  

   Foot 
  Mine, 
  often 
  absent. 
  It 
  has 
  been 
  worked 
  at 
  Afleside, 
  Quarlton, 
  

   and 
  Helpet 
  Edge. 
  

  

  5th. 
  The 
  next 
  seam 
  is 
  the 
  Lower 
  Yard 
  or 
  Bassy 
  Mine, 
  lying 
  18 
  

   yards 
  below 
  the 
  Lower 
  Foot. 
  It 
  has 
  been 
  worked 
  at 
  Up-Holland, 
  

   Harrock 
  Hill, 
  Sharpies 
  near 
  Bolton, 
  Helpet 
  Edge, 
  Broad 
  Bottom, 
  

   Compstall, 
  and 
  New 
  Mills. 
  Shales 
  and 
  a 
  thick 
  bed 
  of 
  hard, 
  fine- 
  

   grained 
  grit, 
  called 
  by 
  Mr. 
  Binney 
  " 
  The 
  "Woodhead 
  Hill 
  Rock," 
  

   lie 
  below 
  this 
  seam. 
  

  

  A 
  group 
  of 
  four 
  or 
  five 
  thin 
  coals, 
  corresponding 
  in 
  the 
  main 
  with 
  

   these 
  seams, 
  is 
  found 
  in 
  the 
  Goyt 
  Trough 
  about 
  Whaley 
  Bridge 
  and 
  

   Goldsitch 
  Moss 
  ; 
  in 
  the 
  Cheadle 
  Coal-field 
  about 
  Ipstones 
  and 
  Frog- 
  

   hall 
  ; 
  and 
  in 
  the 
  Macclesfield 
  Measures 
  at 
  Bakestone 
  Dale, 
  Boiling- 
  

   ton, 
  Kerridge, 
  and 
  Roewood 
  near 
  Macclesfield. 
  

  

  Lastly, 
  at 
  a 
  distance 
  of 
  38 
  yards 
  below 
  the 
  Bassy 
  Mine 
  lies 
  a 
  coal, 
  

   known 
  as 
  the 
  " 
  Featheredge," 
  " 
  Three 
  Quarters," 
  or 
  " 
  Sandrock 
  " 
  

   Coal 
  in 
  Lancashire, 
  and 
  the 
  " 
  Big," 
  " 
  Brick, 
  " 
  or 
  " 
  Limekiln 
  " 
  Coal 
  

   about 
  Macclesfield 
  and 
  in 
  the 
  southern 
  part 
  of 
  the 
  Goyt 
  Trough. 
  

   Its 
  roof 
  is 
  mostly 
  black 
  shale, 
  and 
  under 
  its 
  floor 
  is 
  a 
  coars'e 
  grit 
  or 
  

   conglomerate, 
  known 
  as 
  the 
  " 
  Rough 
  Rock." 
  Here 
  and 
  there, 
  

   however, 
  the 
  Rough 
  Rock 
  forms 
  both 
  the 
  roof 
  and 
  floor. 
  Whether 
  

   such 
  was 
  always 
  the 
  case, 
  or 
  whether 
  the 
  grit 
  roof 
  has 
  in 
  places 
  been 
  

   removed 
  by 
  denudation 
  and 
  its 
  place 
  been 
  taken 
  by 
  shale, 
  cannot 
  

   be 
  said 
  : 
  the 
  frequent 
  absence 
  of 
  the 
  coal 
  itself 
  is 
  somewhat 
  in 
  favour 
  

   of 
  the 
  latter 
  hypothesis. 
  In 
  either 
  case 
  we 
  take 
  the 
  top 
  of 
  this 
  

   Rough 
  Rock 
  for 
  the 
  upper 
  boundary 
  of 
  the 
  Millstone-grit, 
  under 
  

   which 
  head 
  we 
  include 
  the 
  following 
  series 
  of 
  beds. 
  

  

  § 
  3. 
  Subdivision 
  of 
  the 
  Millstone-grit 
  Series. 
  

  

  1st 
  Grit. 
  The 
  R@ugh 
  Rock. 
  A 
  coarse 
  massive 
  grit, 
  crumbling 
  

   under 
  the 
  action 
  of 
  the 
  air, 
  on 
  account 
  of 
  the 
  decomposition 
  of 
  

   felspar, 
  which 
  it 
  contains 
  in 
  large 
  quantity. 
  

  

  Shales, 
  with 
  a 
  thin 
  coal 
  at 
  the 
  bottom 
  west 
  of 
  Buxton, 
  lie 
  below 
  

   the 
  Rough 
  Rock. 
  

  

  * 
  The 
  localities 
  for 
  these 
  seams 
  are 
  taken 
  chiefly 
  from 
  Mr. 
  Binney' 
  s 
  valuable 
  

   papers, 
  " 
  On 
  the 
  Lancashire 
  and 
  Cheshire 
  Coal-field," 
  Trans. 
  G-eol. 
  Soc. 
  of 
  

   Manchester, 
  vol. 
  i. 
  ; 
  and 
  "On 
  the 
  Fossil 
  Shells 
  of 
  the 
  Lower 
  Coal-measures," 
  

   ibid. 
  vol. 
  ii. 
  part 
  7. 
  

  

  