﻿ROCKS 
  OE 
  THE 
  LEICESTERSHIRE 
  COAL-FIELD. 
  9 
  

  

  About 
  500 
  yards 
  east 
  of 
  the 
  section 
  last 
  described 
  is 
  another 
  

   exposure 
  of 
  the 
  Permians 
  and 
  overlying 
  Bunter. 
  It 
  occurs 
  in 
  an 
  old 
  

   brickyard 
  by 
  the 
  roadside, 
  opposite 
  Sharpswood 
  Farm. 
  The 
  details 
  

   are 
  as 
  follows 
  : 
  — 
  

  

  Section 
  in 
  Brickyard 
  near 
  Sharpswood 
  Farm. 
  

  

  ft. 
  in. 
  ft. 
  in. 
  

  

  Bunter 
  f 
  Sandy 
  Clays 
  and 
  coarse 
  Sandstone 
  2 
  to 
  3 
  

  

  ft. 
  in. 
  ft. 
  in. 
  \ 
  Conglomerate 
  (quartzose) 
  with 
  clay 
  galls, 
  in 
  

  

  3 
  5 
  to 
  4 
  5 
  [ 
  part 
  current-bedded 
  1 
  5 
  

  

  (Gcrey 
  argillaceous 
  Sand 
  8 
  

  

  Indurated 
  Bed 
  Marl 
  1 
  5 
  

  

  I 
  Fine 
  Breccia 
  3 
  

  

  Permian 
  | 
  Bed 
  and 
  variegated 
  Marl 
  with 
  sandy 
  streak 
  

  

  ft. 
  in. 
  •{ 
  near 
  top 
  , 
  1 
  7 
  

  

  22 
  10 
  Breccia 
  with 
  a 
  thin 
  argillaceous 
  parting 
  ... 
  3 
  11 
  

   I 
  Bed 
  and 
  variegated 
  Clays 
  with 
  thin 
  bands 
  

  

  of 
  fine 
  whitish 
  sandstone 
  12 
  (about) 
  

  

  ^Breccia 
  3 
  (about) 
  

  

  The 
  above 
  section 
  is 
  the 
  one 
  referred 
  to 
  at 
  page 
  59 
  of 
  the 
  Survey 
  

   Memoir 
  on 
  the 
  Leicestershire 
  Coal-field. 
  The 
  upper 
  portion 
  is 
  there 
  

   correctly 
  referred 
  to 
  the 
  base 
  of 
  the 
  New 
  Bed 
  Sandstone, 
  but 
  Pro- 
  

   fessor 
  Hull 
  was 
  disposed 
  to 
  look 
  upon 
  the 
  Marls 
  and 
  Breccias 
  as 
  

   Upper 
  Coal-measures. 
  On 
  a 
  later 
  visit 
  to 
  the 
  spot 
  in 
  company 
  

   with 
  Sir 
  A. 
  Bamsay 
  and 
  the 
  late 
  Bev. 
  W. 
  H. 
  Coleman 
  he 
  came 
  

   to 
  the 
  conclusion 
  that 
  they 
  must 
  be 
  referred 
  to 
  a 
  newer 
  date, 
  but 
  

   whether 
  to 
  the 
  Permian 
  or 
  Trias 
  was 
  left 
  uncertain. 
  They 
  were, 
  

   however, 
  mapped 
  as 
  Permian, 
  and 
  as 
  the 
  beds 
  in 
  question 
  are 
  

   undoubtedly 
  a 
  lateral 
  extension 
  of 
  those 
  of 
  the 
  Swadlincote 
  open- 
  

   work, 
  a 
  few 
  hundred 
  yards 
  to 
  the 
  west, 
  we 
  now 
  know 
  this 
  classifi- 
  

   cation 
  to 
  be 
  correct. 
  

  

  In 
  the 
  recent 
  sinking 
  of 
  a 
  shallow 
  well 
  in 
  this 
  brickyard 
  the 
  

   thickness 
  of 
  the 
  Permian 
  has 
  been 
  proved 
  to 
  be 
  about 
  the 
  same 
  as 
  

   that 
  of 
  Swadlincote, 
  but 
  the 
  Coal-measures 
  upon 
  which 
  the 
  newer 
  

   rocks 
  lie 
  in 
  the 
  two 
  sections 
  are 
  of 
  an 
  entirely 
  different 
  character. 
  

   At 
  Swadlincote 
  they 
  are 
  purple 
  and 
  variegated 
  clays, 
  followed 
  in 
  

   downward 
  succession 
  by 
  pyritous 
  shales 
  with 
  Coal-seams 
  ; 
  whilst 
  in 
  

   the 
  brickyard 
  the 
  Coal-measures, 
  consisting 
  of 
  hard, 
  grey 
  and 
  blue 
  

   " 
  bind,'" 
  with 
  plant-remains, 
  belong 
  to 
  a 
  very 
  much 
  lower 
  horizon. 
  

   This 
  is 
  accounted 
  for 
  by 
  the 
  fact 
  that 
  the 
  Boothorpe 
  Fault 
  passes 
  

   between 
  the 
  two 
  exposures, 
  a 
  great 
  line 
  of 
  fracture 
  which 
  throws 
  the 
  

   Coal-measures 
  down 
  on 
  the 
  west 
  to 
  the 
  extent 
  of 
  at 
  least 
  1000 
  feet, 
  

   whilst 
  it 
  scarcely 
  affects 
  the 
  overlying 
  rocks 
  of 
  later 
  age 
  *. 
  

  

  * 
  Besides 
  the 
  great 
  Post-Carboniferous 
  and 
  Pre-Permian 
  movement 
  along 
  

   this 
  fault, 
  we 
  have 
  evidence 
  of 
  at 
  least 
  two 
  minor 
  dislocations 
  occurring 
  along 
  

   the 
  same 
  line, 
  the 
  one 
  of 
  Post-Permian 
  and 
  Pre-Triassic 
  age 
  and 
  the 
  other 
  

   Post-Triassic. 
  The 
  evidence 
  for 
  the 
  first 
  of 
  these 
  is 
  to 
  be 
  found 
  in 
  the 
  disturbed 
  

   state 
  of 
  the 
  Permians 
  at 
  the 
  Swadlincote 
  open-work, 
  where 
  they 
  are 
  found 
  dip- 
  

   ping 
  towards 
  the 
  fault 
  at 
  a 
  high 
  angle, 
  whilst 
  the 
  Bunter 
  Conglomerates 
  lie 
  in 
  

   a 
  perfectly 
  undisturbed 
  state 
  across 
  their 
  basset 
  edges. 
  

  

  The 
  Post-Triassic 
  movement 
  along 
  the 
  same 
  line 
  is 
  clearly 
  shown 
  at 
  the 
  

   Boothorpe 
  Clay 
  Works, 
  where 
  the 
  Permian 
  and 
  Trias 
  are 
  both 
  thrown 
  to 
  the 
  

   extent 
  of 
  from 
  20 
  to 
  30 
  feet. 
  

  

  