﻿14 
  MR. 
  H. 
  T. 
  BK0WX 
  OX 
  THE 
  PBEMIAS 
  

  

  certainty 
  be 
  correlated 
  with 
  the 
  Permians 
  of 
  other 
  parts 
  of 
  the 
  Coal- 
  

   field. 
  Their 
  northerly 
  extension 
  cannot, 
  however, 
  be 
  traced 
  further 
  

   down 
  the 
  brook-course 
  than 
  Bugley 
  Cottage, 
  where 
  the 
  Conglo- 
  

   merates 
  again 
  rest 
  directly 
  on 
  the 
  Coal-measures. 
  

  

  Following 
  the 
  sweep 
  of 
  the 
  Bunter 
  hills 
  round 
  Caulkley 
  "Wood, 
  

   there 
  are 
  again 
  found 
  traces 
  of 
  red 
  marls 
  overlying 
  the 
  Coal-measures 
  

   on 
  the 
  south-east 
  side 
  of 
  the 
  wood, 
  and 
  at 
  a 
  small 
  spring 
  in 
  the 
  

   southern 
  angle 
  of 
  the 
  enclosure 
  are 
  indications 
  of 
  red 
  marls 
  associated 
  

   with 
  a 
  few 
  thin 
  beds 
  of 
  a 
  very 
  soft, 
  buff-coloured 
  sandstone, 
  exactly 
  

   similar 
  to 
  the 
  highly 
  characteristic 
  Permian 
  sandstone 
  of 
  the 
  

   Swadlincote 
  open-work 
  section. 
  

  

  A 
  little 
  east 
  of 
  Caulkley 
  "Wood 
  the 
  Millstone 
  Grit 
  rises 
  from 
  beneath 
  

   the 
  Lower 
  Coal-measures 
  of 
  the 
  northern 
  parts 
  of 
  the 
  Coal-field, 
  and 
  

   from 
  Brick 
  House 
  to 
  Enowle 
  Hills 
  the 
  boundary 
  between 
  the 
  Bunter 
  

   Conglomerate 
  and 
  the 
  Grit 
  is 
  represented 
  on 
  the 
  Survey 
  map 
  as 
  a 
  

   fault, 
  having 
  a 
  general 
  direction 
  X.X.E. 
  A 
  careful 
  and 
  prolonged 
  

   study 
  of 
  this 
  part 
  of 
  the 
  district 
  has 
  convinced 
  me 
  that 
  the 
  supposed 
  

   fault 
  has 
  no 
  existence. 
  

  

  From 
  Caulkley 
  Wood 
  to 
  the 
  south 
  side 
  of 
  Gravel-pit 
  Hill 
  the 
  Bunter 
  

   was 
  proved 
  by 
  boring 
  to 
  rest 
  directly 
  on 
  Coal-measures. 
  A 
  little 
  

   south 
  of 
  Brick 
  House 
  the 
  Bunter 
  sweeps 
  round 
  the 
  hill 
  to 
  the 
  north, 
  

   and 
  at 
  this 
  point 
  red 
  Permian 
  Marls 
  with 
  light 
  sandy 
  seams 
  appear 
  

   at 
  its 
  base, 
  and 
  gradually 
  thicken 
  northward, 
  until, 
  under 
  Bond- 
  

   wood 
  Farm, 
  on 
  the 
  slopes 
  overlooking 
  Eepton 
  Eocks, 
  they 
  attain 
  a 
  

   thickness 
  of 
  about 
  60 
  feet. 
  There 
  are 
  no 
  exposures 
  of 
  these 
  beds, 
  

   but 
  I 
  have 
  satisfied 
  myself, 
  by 
  borings 
  conducted 
  at 
  very 
  short 
  inter- 
  

   vals 
  down 
  the 
  slopes, 
  that 
  they 
  do 
  not 
  contain 
  any 
  brecciated 
  bands, 
  

   whilst 
  at 
  the 
  same 
  time 
  they 
  resemble 
  in 
  every 
  other 
  particular 
  the 
  

   Permian 
  Marls 
  further 
  south. 
  Perhaps 
  no 
  other 
  part 
  of 
  the 
  Coal- 
  

   field, 
  where 
  actual 
  exposures 
  are 
  absent, 
  affords 
  better 
  evidence 
  

   than 
  this 
  of 
  the 
  enormous 
  stratigraphical 
  break 
  between 
  the 
  Permian 
  

   and 
  Carboniferous 
  ; 
  for 
  the 
  Marls, 
  which 
  are 
  in 
  contact 
  with 
  Coal- 
  

   measures 
  at 
  Gravel-pit 
  Hill, 
  are 
  found 
  a 
  few 
  hundred 
  yards 
  to 
  the 
  

   north 
  resting 
  upon 
  Millstone 
  Grit, 
  the 
  strike 
  of 
  one 
  set 
  of 
  beds 
  

   being 
  almost 
  at 
  right 
  angles 
  to 
  that 
  of 
  the 
  other. 
  

  

  Repton 
  Rocks. 
  — 
  The 
  natural 
  excavation 
  in 
  the 
  Millstone 
  Grit, 
  

   known 
  as 
  Eepton 
  Eocks 
  or 
  Dawson's 
  Eocks, 
  forms 
  a 
  cul-de-sac, 
  at 
  

   the 
  head 
  of 
  a 
  deep 
  little 
  valley, 
  cut 
  out 
  by 
  a 
  small 
  stream 
  which 
  

   takes 
  its 
  course 
  northwards 
  into 
  the 
  Trent. 
  The 
  Grit 
  is 
  lost 
  sight 
  of 
  

   near 
  a 
  narrow 
  opening 
  at 
  the 
  north 
  end 
  of 
  the 
  cul-de-sac, 
  the 
  valley 
  

   lower 
  down 
  being 
  excavated 
  in 
  the 
  Bunter 
  Conglomerate. 
  It 
  is 
  

   through 
  this 
  point 
  that 
  the 
  supposed 
  fault 
  of 
  the 
  Survey 
  map 
  passes; 
  

   but 
  since 
  I 
  have 
  found 
  Trias 
  and 
  Permian 
  mantling 
  round 
  the 
  north- 
  

   ern 
  extension 
  of 
  the 
  Millstone- 
  Grit 
  outcrop, 
  and 
  occupying 
  ground 
  

   which 
  ought 
  to 
  consist 
  of 
  Grit, 
  it 
  is 
  very 
  evident 
  that 
  no 
  such 
  

   fault 
  exists. 
  

  

  Milton. 
  — 
  The 
  small 
  stream 
  which 
  runs 
  northward 
  from 
  Eepton 
  

   Eocks 
  to 
  Milton 
  is 
  fed 
  by 
  strong 
  springs 
  issuing 
  from 
  the 
  base 
  of 
  

   Bunter 
  Conglomerate, 
  which 
  appears 
  to 
  have 
  been 
  cut 
  through 
  

   almost 
  to 
  the 
  underlying 
  rocks. 
  At 
  one 
  spot 
  in 
  the 
  valley, 
  near 
  a 
  

  

  