﻿PROF. 
  C. 
  LAP 
  WORTH 
  OX 
  THE 
  GIRVAJ5" 
  SUCCESSION. 
  561 
  

  

  grajjtus-beda 
  (Ab 
  4 
  ) 
  are 
  laid 
  open, 
  and 
  the 
  dividing 
  seams 
  of 
  

   calcareous 
  shale 
  contain 
  an 
  abundance 
  of 
  fairly 
  preserved 
  fossils. 
  

  

  The 
  commonest 
  forms 
  are 
  Lejptcena 
  sericea, 
  OrtJiis 
  ccdligramma, 
  

   0. 
  biforata, 
  Turrilepas, 
  sp., 
  Cythere 
  aldensis, 
  AscijdJius, 
  Encrinurus. 
  

  

  These 
  beds 
  dip 
  to 
  the 
  eastward 
  at 
  a 
  small 
  angle, 
  and 
  below 
  them, 
  

   in 
  their 
  natural 
  position, 
  we 
  find 
  the 
  red 
  sandstones 
  (Aa 
  2 
  ) 
  in 
  an 
  

   old 
  cart-track 
  on 
  the 
  hill-face 
  above 
  the 
  ruins 
  of 
  Xirkdominae. 
  

  

  In 
  Kirkdominas 
  JBurn 
  the 
  J/«c?i(r<?«-beds 
  (Ab 
  2+3 
  ) 
  are 
  dis- 
  

   cernible, 
  preserving 
  generally 
  their 
  original 
  line 
  of 
  strike, 
  but 
  

   greatly 
  shattered 
  and 
  folded. 
  Below 
  we 
  find 
  a 
  large 
  development 
  of 
  

   the 
  Purple 
  Conglomerate 
  (Aa 
  1 
  ) 
  which 
  is 
  exhibited 
  in 
  the 
  stream- 
  

   course. 
  

  

  A 
  well-marked 
  X.E. 
  and 
  S.AY. 
  fault 
  throws 
  down 
  a 
  patch 
  of 
  the 
  

   calcareous 
  beds 
  in 
  their 
  proper 
  position 
  below 
  the 
  Benan 
  Conglomerate 
  

   in 
  the 
  higher 
  reaches 
  of 
  the 
  little 
  burn, 
  on 
  both 
  sides 
  of 
  which 
  the 
  

   Compact 
  Limestone 
  (Ab 
  3 
  ) 
  has 
  formerly 
  been 
  excavated. 
  To 
  the 
  west 
  

   also 
  the 
  line 
  of 
  junction 
  of 
  the 
  Benan 
  Conglomerate 
  (Ac) 
  and 
  the 
  

   Calcareous 
  Series 
  (Ab) 
  is 
  visible 
  for 
  some 
  distance 
  upon 
  the 
  grassy 
  

   hill-side. 
  The 
  green 
  calcareous 
  and 
  concretionary 
  Didymograptus- 
  

   shales 
  (Ab 
  4 
  ) 
  are 
  shown 
  in 
  their 
  normal 
  transitional 
  position 
  in 
  

   several 
  natural 
  exposures. 
  

  

  In 
  Auch 
  ensoul 
  Burn, 
  which 
  lies 
  about 
  a 
  quarter 
  of 
  a 
  mile 
  to 
  the 
  

   eastward 
  of 
  Kirkdomince 
  Burn, 
  all 
  that 
  the 
  many 
  faults 
  of 
  this 
  spot 
  

   have 
  left 
  visible 
  are 
  certain 
  lime-beds, 
  full 
  of 
  pebbles 
  of 
  igneous 
  

   rocks, 
  imbedded 
  in 
  a 
  matrix 
  so 
  highly 
  calcareous 
  that 
  it 
  almost 
  

   deserves 
  the 
  title 
  of 
  a 
  limestone. 
  These 
  possibly 
  belong 
  to 
  the 
  

   Purple 
  Conglomerate 
  of 
  Kirkland 
  (Aa). 
  They 
  are 
  seen 
  in 
  the 
  stream- 
  

   course 
  close 
  to 
  the 
  farmsteading 
  of 
  Auchensoul. 
  

  

  4. 
  Dularg 
  $-c. 
  — 
  Crossing 
  the 
  alluvial 
  flats 
  of 
  the 
  Stinchar, 
  which 
  

   are 
  here 
  only 
  about 
  150 
  yards 
  in 
  width, 
  we 
  again 
  come 
  upon 
  the 
  

   calcareous 
  series, 
  dipping 
  off 
  the 
  anticlinal 
  arch 
  to 
  the 
  south-east. 
  

   They 
  are 
  exposed 
  in 
  the 
  bed 
  and 
  banks 
  of 
  the 
  river 
  and 
  in 
  the 
  

   wooded 
  slopes 
  around 
  the 
  farmsteading 
  of 
  Dularg. 
  

  

  In 
  the 
  bed 
  of 
  the 
  river 
  itself 
  the 
  greatly 
  contorted 
  Orthis-conjlnis 
  

   flagstones 
  (Ab 
  1 
  ), 
  and 
  patches 
  of 
  the 
  JIacluvea-'beds 
  (Ab 
  2 
  ), 
  together 
  

   with 
  portions 
  of 
  the 
  underlying 
  Purple 
  Sandstone 
  and 
  Conglomerate 
  

   (Aa), 
  are 
  well 
  displayed. 
  In 
  spite 
  of 
  their 
  shattered 
  character, 
  the 
  

   flagstones 
  are, 
  as 
  usual, 
  tolerably 
  fossiliferous, 
  and 
  yield, 
  among 
  

   others, 
  OrtJiis 
  corifinis, 
  Salt., 
  Maclurea 
  Logani, 
  Salt., 
  StrojpJwmena 
  

   grandis, 
  and 
  fragments 
  of 
  Orthocerata 
  and 
  Corals. 
  

  

  The 
  gentle 
  eastward 
  inclination 
  of 
  these 
  strata 
  is 
  rapidly 
  exchanged 
  

   for 
  a 
  steeper 
  one 
  to 
  the 
  S.W., 
  and 
  their 
  curving 
  strike 
  for 
  a 
  direct 
  

   trend 
  to 
  the 
  S.Yv\, 
  parallel 
  with 
  the 
  normal 
  range 
  of 
  all 
  the 
  strata 
  of 
  

   the 
  region. 
  The 
  effect 
  of 
  this 
  is 
  that 
  the 
  limestone 
  (Ab 
  3 
  ) 
  next 
  makes 
  

   its 
  appearance 
  in 
  two 
  quarries 
  close 
  to 
  the 
  farm 
  of 
  Dularg, 
  dipping 
  

   steadily 
  at 
  a 
  steep 
  angle 
  to 
  theS.E., 
  parallel 
  in 
  strike,but 
  diametrically 
  

   opposite 
  in 
  dip, 
  to 
  its 
  position 
  on 
  the 
  opposite 
  side 
  of 
  the 
  Stinchar 
  

   valley 
  in 
  the 
  slopes 
  of 
  Auchensoul. 
  The 
  limestones 
  in 
  these 
  quarries 
  

   at 
  Dularg 
  are 
  of 
  a 
  purple 
  colour 
  and 
  are 
  greatly 
  hardened, 
  veined, 
  

   and 
  altered. 
  These 
  appearances 
  are 
  possibly 
  due 
  to 
  the 
  presence 
  of 
  

  

  