﻿PROF. 
  C. 
  LAP 
  WORTH 
  ON 
  THE 
  GIRVAN 
  SUCCESSION. 
  565 
  

  

  great 
  quarry 
  at 
  Minuntion 
  last 
  noticed, 
  eastward 
  as 
  far 
  as 
  the 
  

   summit 
  of 
  the 
  Mull 
  of 
  Milljoan, 
  this 
  conglomerate 
  is 
  exposed 
  in 
  

   every 
  stream 
  that 
  has 
  laid 
  bare 
  the 
  strata 
  below 
  the 
  grassy 
  covering 
  

   of 
  the 
  hill- 
  tops. 
  It 
  varies 
  much 
  in 
  colour, 
  from 
  black 
  through 
  dark 
  

   green 
  and 
  yellow, 
  and 
  even 
  purple 
  ; 
  but 
  we 
  find 
  few 
  traces 
  of 
  an 
  

   approach, 
  either 
  in 
  colour, 
  composition, 
  or 
  texture, 
  to 
  the 
  beautifully 
  

   marbled 
  basal 
  conglomerate 
  of 
  Kirkland 
  and 
  the 
  Stinchar. 
  

  

  Throughout 
  much 
  of 
  this 
  extended 
  area 
  the 
  Benan 
  Conglomerate 
  

   dips 
  at 
  very 
  low 
  angles 
  and 
  is 
  even 
  occasionally 
  perfectly 
  flat 
  : 
  

   indeed 
  in 
  the 
  higher 
  parts 
  of 
  the 
  area, 
  especially 
  along 
  the 
  central 
  

   ridge, 
  this 
  may 
  be 
  said 
  to 
  be 
  the 
  normal 
  position 
  of 
  the 
  rock. 
  

  

  As 
  we 
  approach 
  the 
  exposures 
  of 
  the 
  calcareous 
  series 
  on 
  the 
  

   opposite 
  sides 
  of 
  the 
  ridge, 
  the 
  angle 
  of 
  inclination 
  of 
  the 
  con- 
  

   glomerate 
  increases 
  irregularly 
  to 
  an 
  average 
  of 
  about 
  45°. 
  Along 
  

   the 
  typical 
  Minuntion 
  and 
  Auchensoul 
  line, 
  as 
  we 
  have 
  shown, 
  

   this 
  dip 
  is 
  universally 
  to 
  the 
  northivard. 
  In 
  the 
  line 
  of 
  exposures 
  

   between 
  Dupin 
  and 
  Brockloch, 
  which 
  we 
  have 
  next 
  to 
  notice, 
  the 
  

   dip 
  is 
  in 
  the 
  opposite 
  direction, 
  or 
  to 
  the 
  southward. 
  This 
  renders 
  

   it 
  highly 
  probable, 
  even 
  at 
  this 
  early 
  stage 
  of 
  our 
  inquiry, 
  that 
  the 
  

   Benan-HiU 
  Conglomerate 
  of 
  this 
  area 
  will 
  be 
  found 
  to 
  be 
  arranged 
  

   in 
  a 
  synclinal 
  form, 
  and 
  that 
  the 
  calcareous 
  rocks 
  which 
  rise 
  out 
  

   from 
  below 
  it 
  to 
  the 
  northward 
  in 
  the 
  valley 
  of 
  the 
  Assel 
  will 
  prove 
  

   identical 
  with 
  those 
  of 
  our 
  typical 
  calcareous 
  series 
  of 
  Minuntion 
  and 
  

   the 
  Stinchar. 
  

  

  1. 
  Dupin. 
  — 
  The 
  first 
  series 
  of 
  these 
  exposures 
  of 
  calcareous 
  beds 
  

   is 
  disposed 
  in 
  a 
  broken 
  line 
  stretching 
  from 
  the 
  Barr 
  road 
  near 
  the 
  

   foot 
  of 
  Pinjerrach 
  Hill, 
  down 
  the 
  southern 
  slope 
  of 
  the 
  valley 
  of 
  the 
  

   Assel 
  to 
  Daldowie, 
  and 
  thence 
  across 
  the 
  river-valley 
  into 
  the 
  woods 
  

   of 
  Letterpin 
  and 
  Pinmore. 
  The 
  most 
  satisfactory 
  of 
  the 
  exposures 
  

  

  Eig. 
  3. 
  — 
  Section 
  of 
  the 
  Strata 
  of 
  Dupin 
  Linn. 
  

  

  S 
  V, 
  ft 
  W.W. 
  

  

  Ac. 
  Green 
  Conglomerate 
  of 
  Benan 
  Hill. 
  

   Stinchar 
  limestone 
  group 
  : 
  — 
  

  

  Ab 
  3 
  . 
  Flaggy 
  Limestones 
  ; 
  fossils 
  rare. 
  

   Ab 
  2 
  . 
  Impure 
  Limestones 
  with 
  Maclurea. 
  

   Ab 
  1 
  . 
  Nodular 
  calcareous 
  beds 
  with 
  Orthis 
  confirm, 
  Strophor 
  

   UIcbhus, 
  &c. 
  

   Kirkland 
  Beds 
  : 
  — 
  

  

  Aa 
  2 
  . 
  Purple 
  and 
  grey 
  sandy 
  beds, 
  much 
  shattered. 
  

   ? 
  Aa\ 
  Purple 
  and 
  green 
  Conglomerate, 
  broken 
  and 
  faulted. 
  

  

  