﻿

  PROP. 
  C. 
  LAPWORTH 
  ON 
  THE 
  GIRVAN 
  SUCCESSION. 
  

  

  (535 
  

  

  medium 
  angle, 
  and 
  afford 
  proofs 
  of 
  the 
  extension 
  of 
  our 
  lowest 
  

   Penwhapple 
  shale-band 
  to 
  this 
  spot, 
  both 
  in 
  their 
  petrographical 
  

   features, 
  and 
  the 
  presence 
  of 
  

  

  Diplograptus 
  tainariscus, 
  Nick. 
  

  

  modestus, 
  Lapw. 
  

  

  Climacograptus 
  nornialis, 
  Lapw. 
  

  

  Monograptus 
  cyphus, 
  Lapw. 
  

  

  gregarius, 
  Lapw. 
  

  

  tenuis, 
  Portl. 
  

  

  and 
  the 
  generality 
  of 
  the 
  Penwhapple 
  forms 
  (see 
  fig. 
  25). 
  

  

  At 
  this 
  point 
  the 
  fault 
  of 
  Saugh-hill 
  Burn 
  brings 
  the 
  band 
  to 
  a 
  

   sudden 
  termination, 
  the 
  Ardmillan 
  beds 
  occupying 
  the 
  hill-slopes 
  

   immediately 
  to 
  the 
  westward. 
  

  

  S.E 
  

  

  Fig. 
  25. 
  — 
  Section 
  across 
  the 
  N.W. 
  face 
  of 
  Saugh 
  Bill. 
  

  

  x.w. 
  

  

  Savc~ 
  f//t.i 
  338 
  ft 
  

  

  

  Ardmillan 
  Series 
  : 
  — 
  

  

  Ba 
  4 
  . 
  Ardwell 
  Beds. 
  Thin-bedded 
  mudstones 
  and 
  conglomeratic 
  grits 
  of 
  

   the 
  Cascade-zone, 
  with 
  Dicellograptus 
  Forchhammeri, 
  Dicranograptus 
  

   Nicholsoni, 
  &c. 
  

   Be. 
  Barren 
  Flagstones, 
  with 
  Nematolites. 
  

   (C) 
  Newlands 
  Series 
  : 
  — 
  

   Cba. 
  Woodland 
  beds. 
  

  

  (2) 
  Craigskelly 
  conglomerate 
  ? 
  

  

  (3) 
  Striped 
  shales, 
  with 
  Diplograptus 
  modestus, 
  Monograptus 
  lepto- 
  

   tkeca, 
  &c. 
  

  

  (4) 
  Grey 
  shales, 
  non-fossiliferous. 
  

   Cbb. 
  Saugh-Hill 
  beds. 
  

  

  (1) 
  Grits 
  and 
  flagstones 
  and 
  quartz 
  conglomerate, 
  grey, 
  with 
  Clifna- 
  

  

  cograptus 
  &c. 
  

  

  (2) 
  Calcareous 
  band. 
  

  

  (3) 
  Pale 
  yellow 
  sandstones, 
  grits, 
  and 
  conglomerates. 
  

   Cbc. 
  Monograptus-Sedgwickii 
  beds. 
  

  

  1. 
  Grey 
  and 
  green 
  shales 
  and 
  thin-bedded 
  flagstones, 
  with 
  Bastrites 
  

   peregrinus, 
  Diplograptus 
  palmeus, 
  &c. 
  

  

  Penwhapple 
  Grits 
  and 
  Shales. 
  — 
  Returning 
  therefore 
  to 
  our 
  con- 
  

   tinuous 
  section 
  in 
  Penwhapple 
  Glen, 
  we 
  next 
  proceed 
  to 
  define 
  

   the 
  distribution 
  of 
  the 
  succeeding 
  zones 
  of 
  pebbly 
  grits 
  which 
  there 
  

  

  2u2 
  

  

  