﻿170 
  T. 
  F. 
  JAMIESON 
  ON 
  THE 
  EED 
  CLAY 
  

  

  the 
  other 
  coming 
  northward 
  along 
  the 
  coast 
  from 
  Stonehaven, 
  bringing 
  

   the 
  red 
  mud, 
  and 
  both 
  meeting 
  a 
  little 
  to 
  the 
  north 
  of 
  Peterhead. 
  

  

  The 
  eastward 
  flow 
  of 
  the 
  Moray-Pirth 
  ice 
  across 
  the 
  northern 
  

   border 
  of 
  Aberdeenshire 
  is 
  further 
  proved 
  by 
  the 
  general 
  direction 
  

   of 
  the 
  transport 
  of 
  boulders 
  in 
  that 
  quarter, 
  as 
  I 
  hope 
  to 
  show 
  more 
  

   fully 
  in 
  a 
  subsequent 
  paper. 
  

  

  At 
  the 
  town 
  of 
  Aberdeen 
  the 
  Red 
  Clay 
  is 
  associated 
  with 
  beds 
  of 
  

   fine 
  pale 
  ashy-grey 
  clay 
  ; 
  and 
  there 
  is 
  also 
  some 
  of 
  a 
  dun 
  colour, 
  

   which 
  may 
  have 
  arisen 
  from 
  the 
  mingling 
  of 
  the 
  two 
  sediments. 
  

   The 
  grey 
  clay 
  has 
  probably 
  been 
  derived 
  from 
  the 
  liquid 
  mud 
  pro- 
  

   ceeding 
  from 
  the 
  glacier 
  of 
  the 
  Dee 
  valley. 
  The 
  chief 
  mass 
  of 
  this 
  

   fine 
  grey 
  clay 
  seems 
  to 
  lie 
  below 
  the 
  red 
  ; 
  but 
  in 
  some 
  cuttings 
  the 
  

   two 
  are 
  interlaminated. 
  Details 
  of 
  sections 
  will 
  be 
  found 
  in 
  the 
  

   Quart. 
  Journ. 
  Geol. 
  Soc. 
  for 
  Nov. 
  1858, 
  vol. 
  xiv. 
  p. 
  509. 
  

  

  In 
  the 
  district 
  of 
  Slains 
  and 
  Cruden, 
  between 
  the 
  river 
  Ythan 
  and 
  

   Peterhead, 
  the 
  clay 
  is 
  widely 
  spread 
  and 
  the 
  red 
  colour 
  strongly 
  

   marked. 
  

  

  I 
  ought 
  to 
  have 
  mentioned 
  that 
  small 
  pieces 
  of 
  what 
  appears 
  to 
  

   be 
  chalk, 
  often 
  glacially 
  marked, 
  are 
  not 
  uncommon 
  in 
  the 
  clay-pit 
  

   at 
  Dryleys 
  * 
  near 
  Montrose, 
  and 
  also 
  at 
  the 
  Black-dog 
  pit 
  at 
  Belhelvie 
  

   on 
  the 
  Aberdeenshire 
  coast. 
  I 
  have 
  likewise 
  found 
  them, 
  but 
  more 
  

   rarely, 
  at 
  Invernettie 
  near 
  Peterhead. 
  Small 
  pieces 
  of 
  coal 
  also 
  occur 
  

   both 
  at 
  Dryleys 
  and 
  Belhelvie. 
  

  

  8. 
  Direction 
  of 
  the 
  Ice-flow 
  to 
  the 
  South 
  of 
  Stonehaven. 
  

  

  Mr. 
  Irvine, 
  of 
  the 
  Geological 
  Survey, 
  has 
  observed 
  marks 
  of 
  glacia- 
  

   tion 
  on 
  the 
  coast 
  at 
  a 
  place 
  called 
  the 
  Crawton, 
  a 
  few 
  miles 
  south 
  of 
  

   Stonehaven, 
  in 
  a 
  direction 
  from 
  S/W. 
  to 
  N.E. 
  ; 
  and 
  in 
  an 
  old 
  note- 
  

   book 
  of 
  my 
  own 
  I 
  find 
  an 
  entry 
  of 
  having 
  seen 
  ice-marks 
  on 
  trap 
  

   rock 
  near 
  the 
  mouth 
  of 
  the 
  north 
  Esk, 
  not 
  far 
  from 
  Montrose, 
  

   running 
  from 
  S.W. 
  to 
  N.E., 
  and 
  covered 
  by 
  a 
  thick 
  mass 
  of 
  coarse 
  

   pebbly 
  red 
  clay. 
  On 
  the 
  Old 
  Bed 
  Conglomerate 
  of 
  the 
  Garvock 
  hills, 
  

   which 
  form 
  a 
  low 
  ridge 
  parallel 
  to 
  the 
  coast 
  in 
  the 
  southern 
  part 
  of 
  

   Kincardineshire, 
  Dr. 
  Simpson 
  of 
  Mary 
  Kirk 
  many 
  years 
  ago 
  showed 
  

   me 
  some 
  good 
  instances 
  of 
  glaciation. 
  The 
  direction 
  was 
  about 
  due 
  

   E. 
  and 
  W., 
  crossing 
  the 
  chain 
  obliquely. 
  This 
  is 
  not 
  the 
  direction 
  

   in 
  which 
  we 
  should 
  expect 
  land-ice 
  to 
  have 
  moved 
  in 
  that 
  quarter 
  

   if 
  unobstructed 
  ; 
  for 
  the 
  general 
  slope 
  of 
  the 
  country 
  from 
  the 
  Gram- 
  

   pians 
  to 
  the 
  sea 
  is 
  from 
  N.W. 
  to 
  S.E. 
  But 
  if 
  the 
  ice 
  was 
  diverted 
  

   northward 
  along 
  the 
  coast, 
  it 
  is 
  just 
  what 
  might 
  be 
  looked 
  for, 
  as 
  

   there 
  would 
  be 
  a 
  point 
  where 
  the 
  ice 
  in 
  curving 
  round 
  from 
  N.W. 
  

   to 
  S.W. 
  would 
  move 
  due 
  E. 
  ; 
  and 
  Dr. 
  Howden 
  of 
  Montrose 
  states 
  

   that 
  the 
  general 
  run 
  of 
  the 
  glacial 
  markings 
  in 
  that 
  quarter 
  is 
  from 
  

   W. 
  to 
  E. 
  

  

  The 
  features 
  of 
  the 
  sea-bottom 
  along 
  this 
  north-eastern 
  part 
  of 
  

   Scotland 
  seem 
  to 
  bear 
  some 
  testimony 
  to 
  the 
  former 
  flow 
  of 
  a 
  stream 
  

   of 
  ice 
  parallel 
  to 
  the 
  coast. 
  There 
  is 
  a 
  submarine 
  bank 
  of 
  elevated 
  

  

  * 
  An 
  interesting 
  account 
  of 
  the 
  superficial 
  beds 
  of 
  clay 
  &c. 
  at 
  Montrose, 
  by 
  

   Dr. 
  Howden, 
  will 
  be 
  found 
  in 
  the 
  Trans, 
  of 
  the 
  Edin. 
  Geol. 
  Soc. 
  for 
  1868. 
  

  

  