﻿1864.] 
  HULL 
  AND 
  GREEN 
  MILLSTONE-GRIT. 
  255 
  

  

  sented 
  by 
  one 
  or 
  two 
  beds 
  of 
  rather 
  fine 
  grit, 
  not 
  more 
  perhaps 
  than 
  

   150 
  feet 
  in 
  thickness. 
  These 
  we 
  shall 
  henceforward 
  speak 
  of 
  as 
  

   the 
  fourth 
  and 
  fifth 
  grits. 
  The 
  Yoredale 
  Grit 
  is 
  also 
  less 
  massive 
  

   than 
  in 
  The 
  Peak 
  country. 
  Even 
  the 
  third 
  grit, 
  which 
  rises 
  with 
  a 
  

   fine 
  escarpment 
  on 
  both 
  sides 
  of 
  the 
  Goyt 
  Trough, 
  on 
  the 
  western 
  

   side 
  of 
  the 
  Saltersford 
  Valley 
  assumes 
  for 
  a 
  time 
  the 
  character 
  of 
  a 
  

   flaggy 
  sandstone 
  of 
  no 
  great 
  thickness. 
  The 
  same 
  is 
  true, 
  though 
  in 
  

   a 
  less 
  degree, 
  of 
  the 
  remaining 
  grits 
  ; 
  so 
  that 
  between 
  Glossop 
  and 
  

   Bollington, 
  a 
  distance 
  of 
  twelve 
  miles 
  from 
  north-east 
  to 
  south-west, 
  

   the 
  whole 
  Millstone 
  -grit 
  series 
  may 
  be 
  said 
  to 
  exhibit 
  a 
  great 
  dege- 
  

   neracy 
  in 
  many 
  of 
  its 
  features, 
  and 
  to 
  give 
  clear 
  indications 
  of 
  that 
  

   general 
  thinning 
  away 
  of 
  the 
  sedimentary 
  materials 
  which 
  takes 
  

   place 
  in 
  this 
  part 
  of 
  Engla 
  id 
  from 
  north 
  to 
  south. 
  

  

  e. 
  West 
  of 
  Buxton. 
  Position 
  of 
  Hocks 
  at 
  the 
  surface. 
  — 
  The 
  town 
  

   of 
  Buxton 
  stands 
  on 
  the 
  Mountain-limestone, 
  which 
  is 
  bounded 
  

   on 
  the 
  west 
  by 
  a 
  fanlt. 
  Crossing 
  this, 
  we 
  pass 
  over 
  first 
  the 
  upper 
  

   part 
  of 
  the 
  Yoredale 
  Rocks, 
  and 
  then 
  the 
  outcrops 
  of 
  the 
  several 
  beds 
  

   of 
  the 
  Millstone 
  -grit 
  as 
  they 
  rise 
  one 
  by 
  one 
  to 
  the 
  surface 
  along 
  

   the 
  eastern 
  edge 
  of 
  the 
  Goyt 
  Trough, 
  forming 
  a 
  series 
  of 
  ridges, 
  of 
  

   which 
  Axe 
  Edge, 
  1809 
  feet 
  above 
  the 
  sea, 
  is 
  the 
  highest. 
  We 
  have 
  

   here 
  perhaps 
  the 
  most 
  perfect 
  of 
  those 
  lesser 
  basins 
  into 
  which 
  the 
  

   Trough 
  of 
  the 
  Goyt 
  is 
  broken 
  up. 
  Around 
  a 
  little 
  outlier 
  of 
  Coal- 
  

   measures 
  in 
  the 
  middle, 
  the 
  grit-beds 
  crop 
  out 
  in 
  turn 
  on 
  all 
  sides, 
  

   and 
  form 
  a 
  series 
  of 
  concentric 
  rings, 
  which, 
  though 
  broken 
  through 
  

   and 
  shifted 
  here 
  and 
  there 
  by 
  faults, 
  keep 
  upon 
  the 
  whole 
  the 
  most 
  

   perfect 
  regularity 
  round 
  three 
  sides, 
  at 
  least, 
  of 
  the 
  basin. 
  A 
  detailed 
  

   map 
  of 
  this 
  little 
  basin, 
  showing 
  the 
  range 
  of 
  each 
  grit-stone, 
  is 
  given 
  

   in 
  fig. 
  6, 
  and 
  the 
  section 
  (fig. 
  5) 
  on 
  p. 
  256 
  runs 
  across 
  it. 
  

  

  On 
  the 
  other 
  side 
  of 
  the 
  trough 
  we 
  find 
  the 
  outcrop 
  of 
  the 
  beds 
  

   from 
  the 
  Bough 
  Rock 
  down 
  to 
  the 
  fourth 
  grit, 
  below 
  which 
  the 
  suc- 
  

   cession 
  is 
  broken 
  by 
  a 
  fault 
  ranging 
  N.W. 
  and 
  S.E. 
  across 
  the 
  basin. 
  

  

  The 
  country 
  in 
  the 
  angle 
  between 
  this 
  and 
  the 
  Anticlinal 
  Fault 
  is 
  

   also 
  worth 
  notice. 
  It 
  may 
  be 
  described 
  as 
  a 
  plateau 
  formed 
  of 
  the 
  

   thick 
  massive 
  bed 
  of 
  the 
  third 
  grit, 
  and 
  cut 
  through 
  by 
  the 
  deep 
  

   valley 
  of 
  Wild 
  Boar 
  Clough. 
  On 
  this 
  plateau 
  rests 
  a 
  long, 
  narrow 
  

   ridge, 
  ranging 
  N.N.E., 
  around 
  the 
  flanks 
  of 
  which 
  the 
  second 
  bed 
  

   crops 
  out; 
  the 
  whole 
  is 
  crowned 
  by 
  the 
  sharp, 
  conical 
  peak 
  of 
  Shut- 
  

   lingslow, 
  rising 
  to 
  a 
  height 
  of 
  about 
  1700 
  feet 
  above 
  the 
  sea, 
  and 
  

   bearing 
  at 
  the 
  top 
  a 
  little 
  outlier 
  of 
  Rough 
  Rock. 
  A 
  slight 
  anticlinal 
  

   runs 
  along 
  the 
  ridge, 
  the 
  beds 
  on 
  one 
  side 
  dipping 
  to 
  the 
  east 
  at 
  about 
  

   10°, 
  and 
  on 
  the 
  other 
  sloping 
  gently 
  towards 
  the 
  opposite 
  quarter. 
  

  

  The 
  Shutlingslow 
  district 
  is 
  bounded 
  on 
  the 
  west 
  by 
  the 
  Anticlinal 
  

   Fault, 
  which 
  brings 
  up 
  some 
  shales 
  and 
  sandstones 
  belonging 
  most 
  

   likely 
  to 
  the 
  Yoredale 
  group 
  : 
  these 
  are 
  soon 
  cut 
  off 
  by 
  a 
  branch 
  

   fault, 
  beyond 
  which 
  the 
  three 
  lowest 
  Gritstones 
  again 
  set 
  in. 
  The 
  

   Third 
  Grit, 
  lying 
  nearly 
  flat, 
  stretches 
  westwards 
  from 
  the 
  fault 
  

   over 
  a 
  gently 
  rolling 
  moor, 
  and 
  ends 
  in 
  a 
  steeply 
  scarped 
  cliff, 
  below 
  

   which 
  the 
  ground 
  falls 
  quickly 
  away, 
  and, 
  the 
  dip 
  growing 
  steeper 
  

   to 
  the 
  westward, 
  the 
  fourth 
  and 
  fifth 
  grits, 
  and 
  the 
  upper 
  part 
  of 
  the 
  

   Yoredale 
  Rocks, 
  come 
  out 
  to 
  day. 
  

  

  