﻿242 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Mar. 
  23f, 
  

  

  2. 
  On 
  the 
  Millstone-grit 
  of 
  North 
  Staffordshire 
  and 
  the 
  adjoining 
  

   parts 
  of 
  Derbyshire, 
  Cheshire, 
  and 
  Lancashire. 
  By 
  E. 
  Hull, 
  

   Esq., 
  B.A., 
  F.G.S., 
  Geologist 
  ; 
  and 
  A. 
  H. 
  Green, 
  Esq., 
  M. 
  A., 
  F.G.S., 
  

   Assistant 
  Geologist 
  of 
  the 
  Geological 
  Survey 
  of 
  Great 
  Britain. 
  

  

  (Plate 
  XIV.) 
  

  

  Contents. 
  

  

  1. 
  Introduction. 
  

  

  2. 
  Lower 
  Coal-measures 
  and 
  upper 
  limit 
  of 
  Millstone 
  grit. 
  

  

  3. 
  Millstone-grit 
  series. 
  

  

  4. 
  Yoredale 
  Kocks. 
  

  

  5. 
  Description 
  of 
  the 
  Sections. 
  

   a. 
  Saddleworth 
  Valley. 
  

  

  b. 
  Mottram 
  and 
  Glossop 
  district. 
  

  

  c. 
  "The 
  Peak" 
  district. 
  

  

  d. 
  Whaley 
  Bridge 
  and 
  the 
  Saltersford 
  valley. 
  

  

  e. 
  West 
  of 
  Buxton, 
  Shutlingslow, 
  and 
  Bosley 
  Minn. 
  

  

  /. 
  Between 
  Longnor 
  and 
  Congleton 
  ; 
  the 
  G-oldsitch 
  Coal-field. 
  

   g. 
  The 
  Biddulph 
  and 
  Budyerd 
  basins, 
  with 
  the 
  Mountain 
  

  

  Limestone 
  of 
  Astbury 
  and 
  Mixon. 
  

   h. 
  The 
  Pottery, 
  Wetley, 
  and 
  Cheadle 
  Coal-fields. 
  

   6. 
  Summary. 
  

  

  1 
  

  

  (E. 
  Hull.) 
  

  

  ►(A. 
  H.Green.) 
  

  

  § 
  1. 
  Introduction, 
  

  

  Around 
  the 
  junction 
  of 
  the 
  counties 
  of 
  Staffordshire, 
  Derbyshire, 
  and 
  

   Cheshire 
  lies 
  a 
  tract 
  of 
  rough 
  moorland, 
  which, 
  from 
  the 
  opportu- 
  

   nities 
  it 
  affords 
  of 
  studying 
  the 
  lower 
  rocks 
  of 
  the 
  Carboniferous 
  

   system, 
  would 
  seem 
  to 
  deserve 
  more 
  notice 
  than 
  it 
  has 
  hitherto 
  met 
  

   with 
  at 
  the 
  hands 
  of 
  geologists. 
  

  

  The 
  authors 
  of 
  the 
  present 
  paper 
  have 
  been, 
  during 
  the 
  last 
  two 
  

   years, 
  engaged 
  in 
  mapping 
  this 
  country 
  for 
  the 
  Geological 
  Survey 
  of 
  

   Great 
  Britain, 
  and, 
  with 
  the 
  permission 
  of 
  the 
  Director-General, 
  Sir 
  

   R. 
  I. 
  Murchison, 
  now 
  come 
  to 
  lay 
  some 
  of 
  the 
  results 
  of 
  their 
  obser- 
  

   vations 
  before 
  the 
  Society. 
  

  

  The 
  main 
  object 
  will 
  be 
  to 
  trace 
  the 
  thinning 
  away, 
  step 
  by 
  step, 
  

   of 
  the 
  Millstone-grit 
  from 
  Lancashire 
  to 
  the 
  borders 
  of 
  the 
  North 
  

   Staffordshire 
  Coal-fields 
  ; 
  but 
  a 
  few 
  other 
  points 
  bearing 
  on 
  the 
  

   geology 
  of 
  the 
  district 
  will 
  be 
  shortly 
  noticed. 
  

  

  The 
  country 
  over 
  which 
  the 
  observations 
  extend 
  begins 
  at 
  Saddle 
  - 
  

   worth 
  valley 
  on 
  the 
  north, 
  and 
  stretches 
  on 
  the 
  one 
  side 
  through 
  

   Macclesfield 
  and 
  Congleton 
  to 
  the 
  Pottery 
  Coal-field, 
  and 
  on 
  the 
  

   other, 
  past 
  Buxton 
  and 
  Leek, 
  to 
  Cheadle 
  in 
  Staffordshire. 
  

  

  It 
  is 
  bounded 
  on 
  the 
  west 
  by 
  a 
  line 
  of 
  fault, 
  known 
  as 
  the 
  " 
  Bed 
  

   Hock 
  Fault," 
  which 
  throws 
  down 
  different 
  members 
  of 
  the 
  New 
  Red 
  

   Sandstone, 
  on 
  the 
  west, 
  against 
  the 
  Carboniferous 
  rocks 
  which 
  cover 
  

   the 
  country 
  to 
  the 
  east. 
  This 
  fault 
  has 
  a 
  probable 
  maximum 
  throw 
  

   of 
  over 
  8000 
  feet 
  south 
  of 
  Congleton, 
  where 
  it 
  brings 
  the 
  Mountain- 
  

   limestone 
  against 
  the 
  Lower 
  Keuper 
  Sandstone, 
  or 
  Waterstones, 
  of 
  

   the 
  Trias. 
  

  

  The 
  chief 
  geological 
  features 
  may 
  be 
  described 
  in 
  a 
  few 
  words. 
  

   On 
  the 
  extreme 
  east, 
  and 
  lying 
  to 
  the 
  west 
  of 
  the 
  High 
  Peak 
  and 
  

  

  