﻿PROF. 
  C. 
  LAPWORTH 
  ON 
  THE 
  GIRVAN 
  SUCCESSION". 
  641 
  

  

  tint 
  of 
  their 
  unweathered 
  interior. 
  In 
  spite 
  of 
  their 
  forbidding 
  

   aspect, 
  they 
  contain 
  many 
  fragments 
  of 
  well-marked 
  fossils, 
  princi- 
  

   pally 
  Strophomena 
  grandis, 
  Atrypa 
  reticularis, 
  A. 
  hemisphairica, 
  

   Dictyonema. 
  

  

  3. 
  Woodland 
  Point. 
  — 
  The 
  line 
  of 
  reefs 
  formed 
  by 
  these 
  Saugh-Hill 
  

   strata 
  is 
  broken 
  beyond 
  the 
  boss 
  of 
  Craigskelly 
  by 
  the 
  wide 
  opening 
  

   of 
  Shalloch 
  Bay. 
  Near 
  the 
  centre 
  of 
  this 
  bay, 
  however, 
  a 
  similar 
  

   band 
  of 
  hard 
  yellow 
  gritstones 
  rises 
  again 
  into 
  view, 
  forming 
  the 
  

   two 
  small 
  islands 
  of 
  the 
  Scart 
  rocks, 
  which 
  are 
  isolated 
  from 
  the 
  

   shore 
  even 
  at 
  lowest 
  tides. 
  At 
  the 
  succeeding 
  headland 
  of 
  Wood- 
  

   land 
  Point, 
  the 
  band 
  comes 
  for 
  the 
  last 
  time 
  upon 
  the 
  shore-line, 
  

   and 
  we 
  are 
  here 
  presented 
  with 
  the 
  most 
  fossiliferous 
  exposure 
  of 
  

   the 
  Lower 
  Saugh-Hill 
  strata 
  in 
  the 
  Girvan 
  region. 
  

  

  Fig. 
  27. 
  — 
  Section 
  of 
  the 
  Strata 
  at 
  Woodland 
  Point. 
  

  

  S.E. 
  «. 
  N.W. 
  

  

  Mr 
  o 
  odLx."d^a.y 
  

  

  Newlands 
  Series: 
  — 
  

   Scart 
  grits 
  (? 
  Saugh-Hill 
  beds). 
  

  

  ■> 
  {b) 
  Thick 
  -bedded 
  pale-hearted 
  gritstones, 
  with 
  occasional 
  flags. 
  

   (a) 
  Quartz 
  conglomerate 
  and 
  pebble-beds. 
  

   Woodland 
  beds. 
  

  

  y. 
  Thin-bedded 
  soft 
  shales 
  and 
  raudstones, 
  with 
  carbonaceous 
  

   seam 
  8 
  : 
  Monograptus 
  leptotheca, 
  Climacograptus 
  normalis, 
  &c, 
  

   Orthoceras, 
  Encrinurus, 
  Atryjja. 
  

   (5. 
  Calcareous 
  flagstones 
  (Woodland 
  or 
  Lower 
  Pentamerus-lime- 
  

   stone), 
  crowded 
  with 
  Stricklandinia 
  lens, 
  Pentamervs 
  oblongus, 
  

   Strophomena 
  grandis, 
  &c. 
  

   a. 
  Calcareous 
  flags 
  and 
  shales, 
  with 
  few 
  fossils. 
  

   B. 
  Ardmillan 
  Series 
  : 
  — 
  Barren 
  Flagstones. 
  

   /. 
  Faults. 
  

  

  The 
  headland 
  itself 
  is 
  composed 
  of 
  a 
  long 
  reef 
  of 
  gritstone, 
  which 
  

   at 
  low 
  water 
  is 
  united 
  to 
  the 
  main 
  shore-line 
  by 
  a 
  sandy 
  beach, 
  but 
  

   at 
  high 
  water 
  forms 
  a 
  rugged 
  island 
  of 
  the 
  type 
  of 
  Craigskelly. 
  The 
  

   above 
  section 
  (fig. 
  27) 
  affords 
  a 
  general 
  idea 
  of 
  the 
  disposition 
  of 
  the 
  

   strata 
  at 
  this 
  interesting 
  locality. 
  

  

  The 
  main 
  body 
  of 
  the 
  reef 
  is 
  formed 
  of 
  a 
  series 
  of 
  yellow- 
  

   weathering 
  gritstones 
  (6), 
  in 
  beds 
  varying 
  from 
  2 
  to 
  4 
  feet 
  in 
  thick- 
  

   ness. 
  They 
  are 
  pale-hearted 
  and 
  very 
  intractable 
  under 
  the 
  hammer 
  ; 
  

   but 
  the 
  matrix 
  is 
  not 
  coarser 
  than 
  that 
  of 
  the 
  average 
  gritstones 
  of 
  

   Saugh 
  Hill 
  and 
  Penwhapple. 
  The 
  breadth 
  of 
  the 
  reef 
  occupied 
  by 
  

   these 
  massive 
  gritstones 
  cannot 
  be 
  less 
  than 
  100 
  feet; 
  but 
  the 
  beds, 
  

   through 
  varying 
  but 
  little 
  from 
  the 
  perpendicular, 
  afford 
  indications 
  

  

  