﻿154 
  T. 
  "F. 
  JAMIESON 
  ON 
  THE 
  CKAG-SHELL 
  

  

  may 
  afford 
  us 
  some 
  clue 
  to 
  the 
  line 
  in 
  which 
  the 
  transporting 
  agent 
  

   moved. 
  The 
  overlying 
  mass 
  of 
  red 
  clay, 
  as 
  I 
  have 
  shown 
  in 
  another 
  

   paper, 
  also 
  indicates 
  a 
  drift 
  from 
  the 
  southward. 
  We 
  may 
  therefore 
  

   suppose 
  that 
  in 
  the 
  Slains 
  district, 
  after 
  the 
  deposition 
  of 
  the 
  grey 
  

   Boulder-clay, 
  there 
  had 
  been 
  a 
  change 
  in 
  the 
  movement 
  of 
  the 
  ice, 
  

   bringing 
  it 
  more 
  from 
  the 
  southward, 
  which 
  may 
  have 
  had 
  some- 
  

   thing 
  to 
  do 
  with 
  the 
  accumulation 
  of 
  the 
  shelly 
  gravel. 
  I 
  incline 
  

   to 
  think 
  that 
  some 
  patch 
  of 
  Crag 
  may 
  have 
  occurred 
  along 
  the 
  coast, 
  

   or 
  occupied 
  part 
  of 
  the 
  low 
  ground 
  near 
  the 
  estuary 
  of 
  the 
  Ythan, 
  and 
  

   had 
  been 
  scoured 
  out 
  by 
  the 
  ice 
  coming 
  across 
  it 
  from 
  the 
  southward. 
  

   The 
  absence 
  of 
  shells 
  and 
  limestone 
  debris 
  in 
  the 
  bottom 
  bed 
  of 
  grey 
  

   rubbish 
  along 
  the 
  coast 
  of 
  Cruden 
  and 
  Slains 
  seems 
  to 
  show 
  that 
  the 
  

   ice 
  which 
  lodged 
  this 
  grey 
  rubbish 
  did 
  not 
  move 
  over 
  the 
  supposed 
  

   Crag 
  beds 
  ; 
  otherwise 
  their 
  debris 
  would 
  have 
  been 
  mixed 
  up 
  with 
  

   the 
  grey 
  stuff. 
  Nor 
  have 
  I 
  ever 
  seen 
  a 
  trace 
  of 
  this 
  debris 
  in 
  the 
  

   Ellon 
  district, 
  to 
  the 
  westward 
  of 
  Slains 
  ; 
  but 
  I 
  have 
  got 
  some 
  small 
  

   pieces 
  of 
  apparently 
  the 
  same 
  sort 
  of 
  limestone 
  to 
  the 
  south-west, 
  in 
  

   the 
  parishes 
  of 
  Logie 
  Buchan 
  and 
  Foveran, 
  imbedded 
  in 
  the 
  subsoil, 
  

   which 
  affords 
  a 
  further 
  indication 
  as 
  to 
  the 
  direction 
  from 
  which 
  the 
  

   transporting 
  agent 
  came. 
  

  

  On 
  the 
  north 
  bank 
  of 
  the 
  Ythan, 
  near 
  the 
  iron 
  bridge 
  at 
  Newburgh, 
  

   there 
  is 
  a 
  thick 
  mass 
  of 
  gravel 
  and 
  sand, 
  covered 
  by 
  a 
  bed 
  of 
  pebbly 
  

   red 
  clay. 
  This 
  gravel 
  much 
  resembles 
  that 
  of 
  the 
  Kippet 
  Hills 
  ; 
  but 
  

   I 
  could 
  find 
  no 
  shells 
  or 
  limestone 
  debris 
  in 
  it. 
  

  

  Along 
  the 
  coast 
  to 
  the 
  south 
  of 
  the 
  Ythan, 
  in 
  the 
  parish 
  of 
  Foveran, 
  

   at 
  a 
  place 
  called 
  Drums, 
  there 
  are 
  some 
  long 
  gravel-ridges, 
  or 
  kaims, 
  

   which 
  appear 
  to 
  be 
  older 
  than 
  the 
  Bed 
  Clay, 
  seeing 
  that 
  patches 
  of 
  

   it 
  lie 
  on 
  the 
  top 
  of 
  them. 
  These 
  gravel-ridges 
  contain 
  many 
  pieces 
  

   of 
  red 
  sandstone 
  and 
  serpentine; 
  but 
  I 
  could 
  see 
  no 
  shells 
  or 
  lime- 
  

   stone 
  in 
  them. 
  They 
  run 
  in 
  a 
  direction 
  from 
  N. 
  to 
  S. 
  and 
  S.W., 
  and 
  

   may 
  be 
  traced 
  for 
  three 
  or 
  four 
  miles 
  from 
  Newburgh, 
  on 
  the 
  river 
  

   Ythan, 
  southward 
  to 
  Menie, 
  in 
  the 
  parish 
  of 
  Belhelvie. 
  Possibly 
  

   they 
  may 
  indicate 
  the 
  margin 
  of 
  that 
  ice-stream 
  which 
  came 
  along 
  

   the 
  coast 
  from 
  the 
  south, 
  to 
  which 
  reference 
  is 
  made 
  in 
  my 
  paper 
  on 
  

   the 
  Red 
  Clay. 
  

  

  