﻿PEOP. 
  C. 
  LAPWOETH 
  ON 
  THE 
  GIEVAX 
  SUCCESSION. 
  

  

  657 
  

  

  Between 
  these 
  beds 
  and 
  the 
  southern 
  margin 
  of 
  the 
  overlapping 
  

   strata 
  of 
  the 
  Lower 
  Carboniferous 
  to 
  the 
  north, 
  beds 
  of 
  flagstone, 
  

   varying 
  from 
  a 
  foot 
  to 
  a 
  few 
  inches 
  in 
  thickness, 
  and 
  separated 
  by 
  

   seams 
  of 
  striped 
  blue 
  and 
  grey 
  shales, 
  are 
  seen 
  at 
  several 
  spots 
  in 
  the 
  

   Lady 
  Burn 
  ; 
  they 
  are 
  occasionally 
  fossiliferous, 
  affording 
  

  

  Cyrtoceras, 
  sp. 
  j 
  Monograptus 
  vomerinus, 
  Kick. 
  

   Orthoceras 
  subundulatuin, 
  Portl. 
  \ 
  Fleiningii, 
  Salt. 
  

  

  It 
  is 
  doubtful 
  if 
  any 
  of 
  these 
  beds 
  actually 
  belong 
  to 
  the 
  Bargany 
  

   group 
  of 
  the 
  area 
  last 
  described, 
  though 
  they 
  greatly 
  remind 
  us 
  of 
  

   the 
  strata 
  of 
  that 
  group 
  in 
  their 
  general 
  features. 
  They 
  clearly 
  

   belong 
  both 
  physically 
  and 
  geologically, 
  however, 
  to 
  the 
  same 
  

   general 
  series 
  as 
  the 
  Bargany 
  beds, 
  possibly 
  following 
  them 
  in 
  the 
  

   natural 
  order 
  of 
  succession. 
  

  

  Pig. 
  30. 
  — 
  General 
  Section 
  of 
  the 
  Silurian 
  beds 
  of 
  Knockgardn&r 
  

   and 
  Straiton. 
  

  

  ySira-ilon- 
  Grits 
  

  

  7fnocl<gtxrdjier 
  and 
  JBlazr 
  

   S^a-lti 
  and. 
  fULqslor.cs 
  

  

  D. 
  Dailly 
  Series. 
  

  

  Db. 
  Straiton 
  beds. 
  

  

  (d) 
  Straiton 
  purplish 
  conglomerate, 
  grits, 
  and 
  flags. 
  

  

  (c) 
  Thin-bedded 
  shaly 
  flags, 
  with 
  Beyrichia 
  KJoedeni 
  (Knock- 
  

  

  gardner 
  beds). 
  

   (b) 
  Grey 
  flags 
  and 
  shales 
  (Blair 
  beds). 
  

   (a) 
  Olive-coloured, 
  non-fossiliferous 
  flags 
  and 
  shales 
  (Drumyork 
  

  

  4. 
  Knoclcgardner 
  and 
  Straiton 
  (fig. 
  30). 
  — 
  The 
  flaggy 
  strata 
  of 
  the 
  

   three 
  subzones 
  of 
  the 
  Blair 
  beds 
  range 
  from 
  this 
  point 
  eastward 
  to 
  

   the 
  village 
  of 
  Straiton, 
  a 
  distance 
  of 
  at 
  least 
  3± 
  miles, 
  running 
  

   strictly 
  parallel 
  with 
  the 
  Bargany 
  fault 
  to 
  the 
  southward. 
  In 
  the 
  

   course 
  of 
  a 
  small 
  stream 
  descending 
  the 
  north 
  slope 
  of 
  Benan 
  Hill, 
  a 
  

   mile 
  south-west 
  of 
  Straiton, 
  the 
  cold 
  olive-green 
  flags 
  of 
  Drumyork 
  are 
  

   again 
  seen 
  in 
  contact 
  with 
  the 
  Old 
  Red 
  Sandstone. 
  The 
  more 
  finely 
  

   laminated 
  strata 
  of 
  Blair 
  Farm 
  are 
  exposed 
  in 
  quarries 
  at 
  the 
  farm- 
  

   steading 
  of 
  Knockgardner, 
  where 
  they 
  are 
  crowded 
  with 
  Beyrichia 
  

   Kloedeni, 
  M'Coy, 
  and 
  yield 
  a 
  few 
  scattered 
  examples 
  of 
  characteristic 
  

   Blair 
  fossils, 
  Pterinea 
  pleuroptera, 
  Conr., 
  Orthonota 
  truncata, 
  Conr., 
  

   &c, 
  and 
  indeterminate 
  species 
  of 
  Cyrtograptus 
  and 
  Monograptus. 
  

  

  The 
  same 
  beds 
  are 
  seen 
  further 
  east 
  in 
  the 
  banks 
  of 
  the 
  Cawin 
  

   Burn. 
  Of 
  the 
  most 
  northerly 
  or 
  highest 
  (?) 
  zone 
  of 
  the 
  Blair 
  beds, 
  

   only 
  a 
  short 
  section 
  is 
  seen 
  in 
  the 
  streams 
  running 
  down 
  the 
  peaty 
  

   region 
  north 
  of 
  Shaw's 
  Knowes. 
  

  

  