﻿570 
  PEOE. 
  C. 
  LAPWOBTH 
  ON 
  THE 
  GIEVAN 
  SUCCESSION. 
  

  

  band 
  we 
  have 
  last 
  described 
  the 
  green 
  and 
  yellow 
  beds 
  of 
  the 
  Benan 
  

   Conglomerate 
  are 
  visible, 
  extending, 
  so 
  far 
  as 
  can 
  be 
  ascertained, 
  in 
  

   an 
  unbroken 
  mass 
  from 
  the 
  limestone 
  band 
  to 
  the 
  sluggish 
  stream 
  

   of 
  the 
  Assel 
  Water. 
  Hence 
  it 
  may 
  be 
  regarded 
  as 
  almost 
  certain 
  

   that 
  this 
  southerly 
  dipping 
  limestone 
  band 
  is 
  here 
  brought 
  to 
  the 
  

   surface 
  by 
  a 
  sharp 
  anticlinal, 
  ranging 
  from 
  N".E. 
  to 
  S.W., 
  a 
  small 
  

   fault 
  running 
  along 
  its 
  summit 
  and 
  depressing 
  the 
  strata 
  to 
  the 
  

   north. 
  On 
  that 
  side, 
  except 
  at 
  Dupin 
  Linn, 
  nothing 
  is 
  visible 
  of 
  

   older 
  date 
  than 
  the 
  Benan 
  Conglomerate 
  (Ac). 
  On 
  the 
  south-east 
  

   margin, 
  however, 
  as 
  we 
  have 
  seen, 
  various 
  thicknesses 
  of 
  the 
  Stinchar 
  

   calcareous 
  series 
  are 
  recognizable, 
  the 
  deepest 
  strata 
  visible 
  being 
  

   the 
  Purple 
  Conglomerate 
  and 
  Sandstones 
  (Aa) 
  of 
  Dupin 
  Linn, 
  which 
  

   we 
  identified 
  at 
  the 
  point 
  where 
  we 
  commenced 
  our 
  study 
  of 
  the 
  

   band. 
  

  

  This 
  anticlinal 
  and 
  its 
  accompanying 
  fault 
  are 
  probably 
  prolonged 
  

   continuously 
  to 
  the 
  south-westward 
  in 
  the 
  same 
  general 
  straight 
  line 
  ; 
  

   but 
  as 
  the 
  Benan 
  Conglomerate 
  is 
  seen 
  in 
  some 
  small 
  exposures 
  

   in 
  this 
  direction 
  immediately 
  west 
  of 
  Dupin 
  Linn, 
  while 
  the 
  lime- 
  

   stone 
  is 
  found 
  in 
  place 
  along 
  a 
  parallel 
  line 
  some 
  500 
  yards 
  to 
  the 
  

   southward, 
  it 
  is 
  possiblo 
  that 
  the 
  fault 
  varies 
  much 
  in 
  throw, 
  and 
  is 
  

   accompanied 
  by 
  parallel 
  dislocations 
  of 
  equal 
  extent. 
  

  

  3. 
  Shalloch- 
  Hill 
  Exposures. 
  — 
  Less 
  than 
  a 
  mile 
  to 
  the 
  west, 
  how- 
  

   ever, 
  the 
  calcareous 
  series 
  again 
  makes 
  its 
  appearance 
  in 
  the 
  exact 
  

   prolongation 
  of 
  the 
  Craigwells 
  fault, 
  as 
  we 
  are 
  presented 
  with 
  a 
  

   fairly 
  continuous 
  section 
  half 
  a 
  mile 
  in 
  length 
  and 
  of 
  very 
  great 
  

   interest. 
  

  

  The 
  limestone 
  is 
  seen 
  in 
  several 
  old 
  quarries 
  excavated 
  in 
  the 
  

   north 
  slope 
  of 
  Shalloch 
  Hill. 
  In 
  the 
  easternmost 
  of 
  these 
  quarries 
  

   the 
  strata 
  are 
  much 
  dislocated, 
  and 
  their 
  junction 
  with 
  the 
  interest- 
  

   ing 
  rocks 
  to 
  the 
  southward 
  is 
  obscured. 
  In 
  the 
  second 
  quarry 
  the 
  

   limestones 
  lie 
  between 
  calcareous 
  flags 
  weathering 
  with 
  a 
  honey- 
  

   combed 
  surface, 
  probably 
  the 
  O.-confinis 
  flags 
  (Ab 
  2 
  ), 
  and 
  soft 
  shales 
  

   and 
  nodular 
  grits 
  representative 
  of 
  the 
  transitional 
  zone 
  of 
  Craigwells 
  

   and 
  Brockloch. 
  Westwards 
  the 
  same 
  flaggy 
  limestones 
  are 
  seen 
  

   projecting 
  from 
  the 
  surface 
  of 
  ploughed 
  fields, 
  and 
  eastwards 
  in 
  the 
  

   bed 
  of 
  the 
  small 
  burn 
  of 
  Auchenmaddy. 
  

  

  These 
  calcareous 
  beds 
  are 
  succeeded 
  to 
  the 
  north 
  by 
  the 
  great 
  

   Benan 
  Conglomerate 
  ; 
  while 
  to 
  the 
  southward 
  they 
  are 
  in 
  contact 
  

   with 
  the 
  remarkable 
  mass 
  of 
  Shalloch 
  Hill, 
  which 
  will 
  be 
  presently 
  

   described. 
  Difficult 
  as 
  it 
  is 
  to 
  discern 
  any 
  stratigraphical 
  evidence 
  

   of 
  value 
  in 
  the 
  Shalloch 
  exposures 
  of 
  these 
  limestones, 
  a 
  study 
  of 
  

   their 
  geographical 
  distribution, 
  as 
  shown 
  upon 
  the 
  map, 
  renders 
  it 
  

   almost 
  certain 
  that 
  they 
  are 
  brought 
  to 
  the 
  surface 
  by 
  the 
  Craigwells 
  

   anticlinal 
  and 
  fault. 
  

  

  Immediately 
  to 
  the 
  south 
  of 
  these 
  quarries 
  we 
  meet 
  with 
  a 
  most 
  

   remarkable 
  exhibition 
  of 
  the 
  Stinchar 
  calcareous 
  beds 
  and 
  their 
  

   underlying 
  purple 
  conglomerate, 
  in 
  the 
  rugged 
  area 
  of 
  Shalloch 
  Hill 
  

   itself 
  (fig. 
  8), 
  which 
  forms 
  one 
  of 
  the 
  outer 
  buttresses 
  of 
  the 
  Benan 
  

   ridge. 
  Within 
  this 
  area, 
  which 
  is 
  about 
  a 
  mile 
  in 
  length 
  and 
  

  

  