﻿PKOF. 
  C. 
  LAPWOKTH 
  OK 
  THE 
  GIEVAN 
  SUCCESSION. 
  621 
  

  

  Generalized 
  Section 
  of 
  the 
  Ardmillan 
  Series 
  

   feet. 
  

   Cd. 
  Druinumck 
  Beds 
  . 
  400 
  

  

  feet, 
  f 
  Upper 
  Mudstones. 
  Lady 
  Burn. 
  

  

  I 
  Starfish-band. 
  Quarrel 
  Hill. 
  

  

  1 
  Lower 
  Mudstones. 
  Drummuek. 
  

  

  I 
  Basal 
  Sandstones. 
  Auld 
  Thorns. 
  

  

  I 
  

  

  Upper 
  zones. 
  Quarrel-Hill 
  Burn, 
  

  

  Cc. 
  Barren 
  Flagstones 
  800 
  -j 
  Middle 
  zones. 
  Penwhapple. 
  

  

  [ 
  Lower 
  zones. 
  Shalloch 
  Mill. 
  

  

  n\. 
  Tm,u~i 
  „^ 
  n^Ac 
  QAn 
  J" 
  Variegated 
  Mudstones. 
  Shalloch 
  Mill. 
  

  

  Cb. 
  Whitehouse 
  Beds 
  . 
  dOU 
  i 
  T 
  ° 
  W1 
  •, 
  , 
  , 
  -, 
  T 
  , 
  , 
  , 
  ~. 
  

  

  { 
  Lower 
  Wmtehouse 
  -beds. 
  Penwhapple 
  Grlen. 
  

  

  {Cascade-beds. 
  Penwhapple. 
  

  

  Middle 
  Flags 
  and 
  Shales. 
  Ardwell 
  shore. 
  

   Knockgerran 
  Shales. 
  Penwhapple. 
  

  

  (a) 
  Sections 
  of 
  the 
  Outer 
  Zones 
  of 
  Strata 
  of 
  the 
  Quarrel-hill 
  Anticlinal. 
  

   (i.) 
  The 
  Conglomerate 
  and 
  Shelly 
  Sandstones 
  of 
  Mulloch 
  Hill. 
  

  

  Having 
  determined 
  the 
  characteristics 
  and 
  sequence 
  of 
  the 
  inner 
  

   and 
  older 
  zones 
  of 
  strata 
  of 
  the 
  Quarrel-Hill 
  anticlinal, 
  we 
  now 
  

   proceed 
  to 
  examine 
  the 
  sections 
  which 
  best 
  display 
  the 
  corresponding 
  

   relations 
  of 
  the 
  outer 
  and 
  therefore 
  newer 
  zones 
  of 
  the 
  dome. 
  It 
  will 
  

   be 
  seen 
  from 
  the 
  map 
  (PI. 
  XXY. 
  2) 
  that 
  the 
  width 
  of 
  the 
  Lower 
  

   Palaeozoic 
  area 
  of 
  Quarrel 
  Hill 
  is 
  not 
  sufficient 
  to 
  allow 
  these 
  outer 
  

   zones 
  to 
  range 
  round 
  the 
  greater 
  part 
  of 
  the 
  mound-like 
  saddle, 
  as 
  do 
  

   the 
  inner 
  and 
  inferior 
  beds 
  already 
  described, 
  but 
  that 
  they 
  merely 
  

   cross 
  over 
  the 
  chief 
  ridge 
  of 
  the 
  declining 
  anticlinal 
  one 
  by 
  one, 
  in 
  

   successive 
  and 
  parallel 
  bands, 
  as 
  we 
  pass 
  outwards 
  to 
  the 
  north- 
  

   east 
  from 
  the 
  natural 
  centre 
  of 
  Quarrel 
  Hill, 
  their 
  outer 
  edges 
  being 
  

   abruptly 
  truncated 
  by 
  the 
  Craighead 
  and 
  Glenshalloch 
  faults. 
  

  

  The 
  rapid 
  convergence 
  of 
  these 
  two 
  dislocations 
  towards 
  the 
  north- 
  

   east 
  progressively 
  restricts 
  the 
  area 
  individually 
  occupied 
  by 
  each 
  

   succeeding 
  zone 
  in 
  the 
  ascending 
  series, 
  until 
  ultimately 
  the 
  two 
  

   faults 
  meet 
  in 
  the 
  wooded 
  heights 
  of 
  Glenshalloch, 
  and 
  the 
  Lower 
  

   Palaeozoic 
  rocks 
  finally 
  disappear 
  from 
  sight. 
  

  

  The 
  older 
  zones 
  of 
  the 
  continually 
  ascending 
  succession 
  of 
  strata 
  

   present 
  in 
  the 
  triangular 
  area 
  thus 
  limited, 
  are 
  most 
  perfectly 
  dis- 
  

   played 
  in 
  and 
  around 
  the 
  central 
  ridge 
  of 
  Quarrel 
  Hill. 
  To 
  the 
  

   northward 
  of 
  this 
  central 
  point 
  no 
  dislocation 
  interferes 
  with 
  the 
  

   sequence, 
  and 
  the 
  regularly 
  ascending 
  series 
  can 
  be 
  studied 
  with 
  

   ease 
  and 
  certainty 
  ; 
  southward 
  a 
  plexus 
  of 
  faults, 
  branches 
  of 
  the 
  

   great 
  Craighead 
  dislocation, 
  have 
  shattered 
  the 
  strata 
  into 
  a 
  host 
  

   of 
  irregular 
  fragments, 
  each 
  one 
  of 
  which, 
  however, 
  falls 
  naturally 
  

   into 
  its 
  proper 
  place 
  after 
  a 
  careful 
  mapping 
  of 
  the 
  ground. 
  

  

  The 
  natural 
  arrangement 
  of 
  the 
  lower 
  divisions 
  of 
  these 
  superior 
  

   zones 
  will 
  be 
  evident 
  on 
  an 
  inspection 
  of 
  the 
  foregoing 
  section 
  

   (fig. 
  21, 
  p. 
  618), 
  which 
  is 
  drawn 
  from 
  the 
  central 
  part 
  of 
  the 
  Quarrel- 
  

   Hill 
  anticlinal 
  of 
  Ardmillan 
  Beds, 
  through 
  the 
  simple 
  and 
  unbroken 
  

   area 
  of 
  Mulloch 
  or 
  Kirk 
  Hill. 
  

  

  (Cal.) 
  Mulloch- 
  Hill 
  Conglomerate. 
  — 
  The 
  soft 
  blue 
  concretionary 
  

   and 
  highly 
  fossiliferous 
  Ih'inucleus-beds 
  of 
  the 
  Drummuek 
  mudstones 
  

  

  