﻿424 
  

  

  ME. 
  E. 
  P. 
  KICHARDS 
  ON 
  THE 
  GRAVELS 
  AND 
  [Aug. 
  i! 
  

  

  h 
  

  

  upon 
  an 
  eroded 
  surface 
  of 
  London 
  Clay 
  (fig. 
  2). 
  During 
  the 
  rail- 
  

   way-operations 
  remains 
  of 
  Elephas 
  primigenius 
  were 
  found 
  very 
  Dear 
  

   this 
  section, 
  and 
  they 
  must 
  presumably 
  have 
  occurred 
  in 
  this 
  gravel. 
  

  

  Fig. 
  2. 
  — 
  Section 
  in 
  the 
  Lambourne 
  Railway 
  -cutting. 
  

  

  Gravelly 
  soil. 
  

  

  Fine 
  flint-gravel, 
  same 
  composition 
  as 
  gravel 
  

   below. 
  

  

  Fine 
  reddish-yellow 
  clay-and-sand 
  loam, 
  as 
  in 
  

   fig. 
  1 
  (p. 
  42a;. 
  

  

  Fine 
  reddish, 
  clayey 
  flint-gravel, 
  composed 
  of 
  

   90 
  0, 
  brown 
  flints, 
  5 
  % 
  black, 
  white, 
  and 
  pale 
  

   coloured 
  flints, 
  and 
  5 
  o/ 
  Q 
  small, 
  slabby, 
  light- 
  

   coloured 
  sarsens. 
  Of 
  the 
  flints 
  95 
  % 
  are 
  sub- 
  

  

  angular, 
  

  

  rounded 
  pebbles. 
  There 
  are 
  

  

  several 
  green-coated 
  flints, 
  and 
  carbonaceous 
  

   layers 
  sometimes 
  occur. 
  

  

  London 
  Clay. 
  

  

  [Vertical 
  scale: 
  5 
  inch=l 
  foot.] 
  

  

  At 
  a 
  gravel-pit 
  on 
  the 
  Bath 
  Road, 
  near 
  the 
  300-foot 
  contour 
  

   (No. 
  6 
  in 
  the 
  Map, 
  PI. 
  XXX), 
  I 
  obtained 
  another 
  section 
  : 
  — 
  

  

  Feet. 
  

   Gravelly 
  soil 
  2 
  

  

  Red 
  loam, 
  siliceous 
  grains, 
  and 
  fine 
  reddish 
  clay 
  (laminated 
  more 
  

   or 
  less) 
  9 
  

  

  Coarse 
  flint 
  -gravel, 
  slightly 
  bedded, 
  with 
  occasional 
  thin 
  lenti- 
  ) 
  

   cular 
  inclusions 
  of 
  stiff, 
  dark 
  clay-with-flints 
  | 
  _ 
  

  

  70 
  °/ 
  large 
  subangular 
  brown-stained 
  flints, 
  with 
  smaller 
  ones 
  in- 
  j 
  

  

  termingled 
  ; 
  20 
  °/ 
  large 
  black 
  flint-nodules 
  coated 
  white, 
  slightly 
  { 
  Gx 
  \ 
  

   rolled 
  ; 
  5 
  °/ 
  well-rounded, 
  stained 
  flint-pebbles, 
  always 
  small 
  . 
  | 
  P 
  0se 
  ' 
  

  

  A 
  few 
  slightly 
  rounded 
  green-coated 
  flints 
  J 
  

  

  The 
  colouring 
  and 
  appearance 
  of 
  the 
  strata 
  exactly 
  coincide 
  in 
  the 
  

   three 
  sections 
  last 
  described. 
  

  

  The 
  main 
  points 
  of 
  difference 
  between 
  the 
  Southern 
  Drift 
  and 
  

   this 
  Donnington 
  gravel 
  are: 
  — 
  (1) 
  The 
  great 
  disparity 
  in 
  levels, 
  

   amounting 
  to 
  a 
  difference 
  of 
  about 
  120 
  feet. 
  (2) 
  The 
  composition 
  ; 
  

   the 
  Glacial 
  (Donnington) 
  gravel 
  containing 
  numerous 
  sarsenstones, 
  

   also 
  green-coated 
  pebbles, 
  gritstones, 
  and 
  large 
  black 
  flint-nodules, 
  

   which 
  are 
  absent 
  from 
  the 
  Snelsmore 
  and 
  Greenham 
  Drift. 
  

   (3) 
  The 
  presence 
  of 
  Bison 
  or 
  Bos 
  and 
  Elephas 
  at 
  Dounington, 
  

  

  