﻿ROCKS 
  OP 
  THE 
  LEICESTERSHIRE 
  COAL-FIELD. 
  11 
  

  

  Coal-field. 
  I 
  have 
  been 
  able 
  to 
  ascertain 
  by 
  a 
  series 
  of 
  borings 
  at 
  

   various 
  points 
  that 
  they 
  are 
  correctly 
  delineated 
  on 
  the 
  Survey 
  Map 
  

   as 
  being 
  overlain 
  by 
  Lower 
  Keuper, 
  and 
  not 
  by 
  Bunter, 
  as 
  is 
  the 
  case 
  

   further 
  to 
  the 
  west. 
  

  

  Measham 
  Fields. 
  — 
  A 
  large 
  outcrop 
  of 
  Permian 
  breccia, 
  nearly 
  

   1 
  mile 
  by 
  j 
  mile, 
  is 
  marked 
  in 
  the 
  Survey 
  Map 
  as 
  occurring 
  here. 
  

   There 
  are 
  no 
  actual 
  exposures 
  of 
  the 
  rock 
  visible 
  at 
  the 
  present 
  time, 
  

   but 
  I 
  have 
  confirmed 
  the 
  existence 
  of 
  the 
  breccia 
  by 
  a 
  number 
  of 
  

   borings. 
  The 
  area 
  of 
  this 
  outcrop 
  of 
  Permian 
  is, 
  however, 
  much 
  

   smaller 
  than 
  appears 
  on 
  the 
  Survey 
  map, 
  where 
  it 
  is 
  shown 
  to 
  extend 
  

   too 
  far 
  to 
  the 
  north. 
  I 
  have 
  found 
  also 
  that 
  on 
  its 
  western 
  edge 
  it 
  

   is 
  overlain 
  by 
  coarse 
  pebbly 
  sandstone 
  of 
  the 
  Bunter, 
  and 
  not 
  

   immediately 
  by 
  Lower 
  Keuper. 
  

  

  Measham. 
  — 
  In 
  an 
  old 
  quarry 
  by 
  the 
  side 
  of 
  the 
  canal, 
  300 
  yds. 
  

   west 
  of 
  the 
  church, 
  is 
  a 
  fine 
  section 
  of 
  the 
  breccia, 
  which 
  is 
  unevenly 
  

   bedded 
  and 
  highly 
  consolidated. 
  The 
  total 
  thickness 
  exposed 
  is 
  

   about 
  13 
  feet, 
  and 
  the 
  apparent 
  dip 
  5° 
  W. 
  30° 
  S. 
  

  

  In 
  a 
  well 
  in 
  Hincks's 
  Close, 
  320 
  yds. 
  east 
  of 
  the 
  church, 
  occurs 
  the 
  

   following 
  section 
  : 
  — 
  

  

  ft. 
  in. 
  

  

  Red 
  Clay 
  9 
  

  

  Lower 
  Keuper 
  Sandstone 
  4 
  

  

  Clay-parting 
  a 
  few 
  inches. 
  

  

  Permian, 
  f 
  Breccia 
  3 
  

  

  21 
  ft. 
  in. 
  i 
  Red 
  Marl, 
  with 
  brecciated 
  fragments 
  18 
  

  

  Blue 
  Coal-measure 
  Clay. 
  

  

  Oakthorpe. 
  — 
  The 
  canal 
  has 
  here 
  been 
  cut 
  through 
  a 
  consolidated 
  

   breccia 
  exactly 
  similar 
  to 
  that 
  of 
  Measham, 
  and 
  the 
  rock 
  has 
  been 
  

   used 
  in 
  the 
  construction 
  of 
  the 
  wall 
  which 
  bounds 
  the 
  towing-path. 
  

   Here 
  again 
  I 
  have 
  found 
  the 
  outcrop 
  of 
  the 
  Permian 
  beds 
  less 
  

   extensive 
  than 
  the 
  Survey 
  map 
  would 
  lead 
  us 
  to 
  expect. 
  

  

  Indications 
  of 
  an 
  unconsolidated 
  breccia 
  are 
  to 
  be 
  found 
  on 
  the 
  

   east 
  side 
  of 
  the 
  railway-cutting, 
  between 
  Oakthorpe 
  and 
  Donisthorpe, 
  

   at 
  a 
  point 
  25 
  yds. 
  north 
  of 
  the 
  bridge 
  which 
  spans 
  the 
  railway 
  at 
  Hall 
  

   Farm. 
  

  

  Overseal. 
  — 
  On 
  following 
  the 
  western 
  edge 
  of 
  the 
  visible 
  Coal-field 
  

   northward 
  from 
  Overseal, 
  frequent 
  indications 
  of 
  the 
  existence 
  of 
  

   thin 
  brecciated-beds 
  are 
  met 
  with, 
  resting 
  immediately 
  on 
  the 
  Coal- 
  

   measures. 
  

  

  Gresley. 
  — 
  Just 
  north 
  of 
  the 
  Castle 
  Hill 
  at 
  Gresley 
  the 
  junction 
  of 
  

   the 
  breccias 
  and 
  overlying 
  Bunter 
  was 
  visible 
  a 
  few 
  years 
  ago 
  in 
  a 
  

   sand-pit. 
  This 
  section, 
  which 
  is 
  now 
  obscured, 
  exhibited 
  very 
  clearly 
  

   the 
  stratigraphical 
  break 
  between 
  the 
  two 
  series 
  of 
  rocks. 
  

  

  Between 
  Gresley 
  Station 
  and 
  Bretby 
  I 
  have 
  found 
  seven 
  small 
  

   outcrops 
  of 
  Permian, 
  which 
  I 
  have 
  laid 
  down 
  with 
  exactness 
  on 
  the 
  

   six-inch 
  map, 
  their 
  boundaries 
  having 
  been 
  determined 
  with 
  the 
  

   boring-rod. 
  The 
  thickness 
  of 
  the 
  beds 
  varies 
  from 
  one 
  or 
  two 
  to 
  

   20 
  feet*. 
  

  

  * 
  The 
  boundary 
  of 
  the 
  Coal-field 
  from 
  a 
  little 
  south 
  of 
  Brizlincote 
  Hall 
  to 
  Oldi- 
  

   cote 
  Farm 
  is 
  represented 
  on 
  the 
  Survey 
  map 
  as 
  a 
  fault, 
  which 
  apparently 
  cuts 
  

   out 
  the 
  Bunter 
  Conglomerate 
  and 
  lets 
  down 
  the 
  Lower 
  Keuper 
  against 
  the 
  Coal- 
  

  

  