﻿1864.] 
  YOUNG 
  GLACIERS. 
  453 
  

  

  parallel 
  to, 
  or 
  entering 
  those 
  once 
  the 
  seats 
  of 
  glaciers, 
  or 
  lying 
  high 
  

   up 
  on 
  the 
  sides 
  of 
  these 
  latter, 
  speaks 
  of 
  an 
  earlier 
  glaciation 
  whose 
  

   resulting 
  deposits 
  have 
  in 
  places 
  been 
  partially 
  removed 
  by 
  the 
  

   later 
  ice-streams. 
  

  

  The 
  above 
  grouping 
  of 
  the 
  hill-masses, 
  though 
  now 
  somewhat 
  

   artificial, 
  is 
  for 
  the 
  distributions 
  of 
  the 
  ice-streams 
  perfectly 
  natural. 
  

   Thus 
  :— 
  

  

  1. 
  From 
  the 
  Broad 
  Law 
  Range 
  glaciers 
  descended 
  into 
  the 
  valleys 
  

   of 
  — 
  On 
  the 
  north 
  side, 
  Manor 
  and 
  Polmood. 
  

  

  On 
  the 
  south 
  side, 
  Cramalt, 
  Linghope, 
  and 
  Wylie's 
  Cleuch. 
  

  

  2. 
  From 
  the 
  White 
  Coomb 
  Range 
  glaciers 
  descended 
  into 
  — 
  

   Northwards, 
  Talla. 
  

  

  Westwards, 
  Gameshope 
  and 
  Donald's 
  Cleuch. 
  

   North-east, 
  Loch 
  Skene, 
  Mid 
  Law 
  Den, 
  and 
  Garlie 
  Burn. 
  

  

  3. 
  From 
  Hartfell 
  a 
  glacier 
  descended 
  into 
  — 
  

   Westwards, 
  Fruid. 
  

  

  They 
  may 
  be 
  further 
  classified 
  as 
  social 
  and 
  solitary, 
  to 
  borrow 
  

   terms 
  from 
  zoology, 
  thus 
  : 
  — 
  

  

  Social 
  — 
  

  

  1 
  . 
  G-ameshope 
  glacier 
  "I 
  united 
  in 
  1 
  

  

  2. 
  Donald's 
  Cleuch 
  glacier 
  J 
  Gameshope 
  V 
  join 
  in 
  lower 
  Talla 
  Valley. 
  

  

  S 
  Talla 
  bifurcates 
  ("left 
  branch 
  J 
  

  

  6. 
  lalla 
  bifurcates 
  1 
  right 
  branch 
  1 
  • 
  • 
  . 
  TT 
  „ 
  ,> 
  . 
  . 
  . 
  

  

  a 
  txr 
  v 
  » 
  m 
  u 
  i 
  • 
  M 
  om 
  m 
  Upper 
  Megget 
  I 
  join 
  in 
  

  

  4. 
  Wylies 
  Cleuch 
  glacier 
  J 
  J 
  lL 
  bfS 
  I 
  Lowe 
  

  

  5. 
  Garlie 
  glacier 
  ... 
  J^ 
  .„ 
  winterhope 
  J 
  Megget 
  

  

  6. 
  Skene 
  glacier 
  bifurcates 
  4 
  . 
  < 
  t 
  b 
  h 
  i 
  

  

  7. 
  Mid 
  Law 
  ...... 
  }j' 
  oin 
  at 
  Tail 
  Burn 
  - 
  

  

  q' 
  p 
  1T 
  f° 
  i 
  \ 
  from 
  common 
  watershed. 
  

  

  Solitary 
  — 
  

  

  10. 
  Manor. 
  

  

  11. 
  Cramalt. 
  

  

  12. 
  Fruid. 
  

  

  The 
  ridge 
  whose 
  terminal 
  heights 
  are 
  Firthy 
  Brig 
  Head 
  and 
  

   Firthope 
  Rig 
  overlooks 
  a 
  shelf 
  or 
  terrace 
  of 
  grit, 
  which 
  is 
  closed 
  to 
  

   the 
  south 
  by 
  White 
  Coomb, 
  passes 
  northwards 
  between 
  Loch 
  Craig 
  

   and 
  Firthy 
  Brig 
  Head 
  into 
  Talla 
  Valley, 
  and 
  to 
  the 
  east 
  dips 
  into 
  

   Mid 
  Law 
  Den 
  and 
  Loch 
  Skene 
  by 
  a 
  steep 
  rocky 
  face, 
  divided 
  by, 
  and 
  

   prolonged 
  on 
  either 
  side 
  of, 
  Mid 
  Craig 
  — 
  a 
  spur 
  running 
  eastwards 
  

   from 
  the 
  centre 
  of 
  the 
  terrace. 
  At 
  the 
  head 
  of 
  Mid 
  Law 
  Den, 
  the 
  

   declivity, 
  whose 
  smoothed 
  rock- 
  surfaces 
  show 
  at 
  one 
  place 
  striations 
  

   running 
  down-hill, 
  ends 
  in 
  a 
  swampy 
  plain 
  stretching 
  from 
  the 
  

   grassy 
  slopes 
  of 
  Mid 
  Craig 
  to 
  the 
  black 
  cliffs 
  of 
  White 
  Coomb. 
  The 
  

   plain 
  is 
  closed 
  in 
  front 
  by 
  a 
  semicircular 
  ridge 
  of 
  rubbish 
  about 
  

   40 
  ft. 
  in 
  height, 
  pierced 
  near 
  its 
  centre 
  by 
  the 
  burn, 
  one 
  extremity 
  

   resting 
  on 
  White 
  Coomb, 
  the 
  other 
  lost 
  among 
  mounds 
  covering 
  the 
  

   flank 
  of 
  Mid 
  Craig. 
  It 
  is 
  a 
  beautifully 
  perfect 
  terminal 
  moraine 
  

   consisting 
  of 
  the 
  usual 
  materials, 
  namely, 
  angular 
  gravel, 
  drab 
  clay- 
  

   sand, 
  and 
  loose 
  blocks, 
  the 
  latter 
  mostly 
  resting 
  on 
  the 
  surface. 
  

   The 
  heaps 
  into 
  which 
  it 
  passes 
  are 
  limited 
  above 
  by 
  a 
  ridge 
  de- 
  

  

  