﻿1864.] 
  HULL 
  AND 
  GREEN 
  MILLSTONE-GRIT. 
  253 
  

  

  row 
  gorge 
  of 
  the 
  Alport. 
  Its 
  base 
  is 
  formed 
  by 
  the 
  cliffs 
  of 
  Kinder 
  

   Scout; 
  and 
  its 
  sides, 
  which 
  are 
  extremely 
  irregular 
  in 
  outline, 
  by 
  

   the 
  similar 
  cliffs 
  overlooking 
  the 
  two 
  valleys 
  just 
  named. 
  Its 
  upper 
  

   surface 
  is 
  somewhat 
  uneven, 
  and 
  is 
  entirely 
  composed 
  of 
  the 
  Mill- 
  

   stone-grit, 
  which, 
  for 
  the 
  most 
  part, 
  is 
  buried 
  beneath 
  a 
  thick 
  coat- 
  

   ing 
  of 
  peat, 
  fissured 
  into 
  innumerable 
  gullies 
  and 
  clefts, 
  which 
  cause 
  

   an 
  excursion 
  across 
  a 
  surface, 
  which 
  on 
  the 
  map 
  appears 
  a 
  plain, 
  to 
  

   be 
  in 
  reality 
  a 
  succession 
  of 
  dips 
  and 
  emersions. 
  

  

  Fig. 
  3. 
  — 
  Views 
  of 
  Rocks 
  on 
  the 
  Peak. 
  

  

  The 
  grit, 
  however, 
  sometimes 
  appears 
  in 
  little 
  bosses, 
  or 
  it 
  throws 
  

   up 
  groups 
  of 
  tabulated 
  or 
  fantastically-shaped 
  stones, 
  the 
  forms 
  of 
  

   which 
  I 
  cannot 
  but 
  regard 
  as 
  the 
  results 
  of 
  old 
  marine 
  denudation. 
  

   In 
  some 
  places, 
  especially 
  near 
  Edale 
  Head, 
  whole 
  acres 
  are 
  covered 
  

   by 
  these 
  groups 
  or 
  multitudinous 
  assemblages 
  of 
  water-worn 
  rocks. 
  

   Amongst 
  the 
  various 
  forms 
  the 
  table 
  is 
  common, 
  but 
  the 
  smith's 
  

   anvil 
  seems 
  to 
  be 
  a 
  special 
  favourite 
  ; 
  nowhere 
  else, 
  as 
  far 
  as 
  my 
  

   acquaintance 
  with 
  these 
  hills 
  has 
  extended, 
  have 
  I 
  observed 
  such 
  

   numerous 
  examples, 
  in 
  the 
  same 
  space, 
  of 
  seashore 
  rocks. 
  

  

  The 
  flanks 
  of 
  the 
  valleys 
  in 
  the 
  Peak 
  country 
  are 
  also 
  remarkable 
  

   for 
  enormous 
  land-slips, 
  the 
  origin 
  of 
  which 
  may 
  in 
  many 
  cases 
  be 
  

   placed 
  as 
  far 
  back 
  as 
  the 
  final 
  retirement 
  of 
  the 
  sea 
  at 
  the 
  close 
  of 
  the 
  

   glacial 
  period. 
  Almost 
  everywhere 
  around 
  the 
  steep 
  cliffs 
  of 
  the 
  

   Peak 
  itself 
  these 
  slips 
  occur, 
  and 
  are 
  easily 
  to 
  be 
  accounted 
  for 
  

   when 
  we 
  examine 
  the 
  nature 
  of 
  the 
  beds 
  which 
  underlie 
  the 
  Scout 
  

   Grit 
  forming 
  the 
  summit 
  of 
  the 
  escarpment. 
  The 
  grit 
  is 
  here 
  un- 
  

   derlain 
  by 
  shales, 
  which 
  intervene 
  between 
  it 
  and 
  the 
  Yoredale 
  

   Grit. 
  Hence 
  the 
  latter, 
  being 
  undermined 
  by 
  the 
  retiring 
  waters, 
  

   or 
  by 
  atmospheric 
  agencies, 
  as 
  the 
  case 
  may 
  be, 
  have 
  yielded 
  to 
  the 
  

   enormous 
  pressure 
  of 
  the 
  superincumbent 
  millstones, 
  which 
  descended 
  

   in 
  masses 
  from 
  their 
  original 
  elevations. 
  A 
  similar 
  arrangement 
  of 
  

   the 
  beds 
  has 
  caused 
  the 
  landslips 
  (or 
  coast-slips) 
  amongst 
  the 
  Oolitic 
  

   escarpments 
  of 
  the 
  south-west 
  of 
  England 
  and 
  the 
  Chalk-downs, 
  

   and 
  indeed 
  wherever 
  solid 
  rock 
  forms 
  a 
  cliff 
  resting 
  upon 
  strata 
  of 
  

   clay 
  or 
  shale. 
  Alport 
  Edge, 
  on 
  the 
  eastern 
  side 
  of 
  the 
  valley, 
  and 
  

   Coombs 
  Rocks, 
  near 
  Mottram, 
  afford 
  similar 
  instances 
  worthy 
  of 
  

   being 
  noticed. 
  

  

  