﻿130 
  

  

  PEOF. 
  J. 
  PEESTWICH 
  ON 
  A 
  PECULIAE 
  

  

  4 
  teeth 
  of 
  Bison, 
  and 
  some 
  undeterminable 
  fragments.- 
  There 
  are 
  

   no 
  traces 
  of 
  gnawing 
  on 
  any 
  of 
  the 
  bones. 
  

  

  When 
  I 
  first 
  visited 
  the 
  cutting 
  the 
  drift- 
  exposure 
  was 
  at 
  its 
  

   deepest, 
  extending 
  to 
  the 
  base 
  of 
  the 
  cutting, 
  a 
  depth 
  of 
  28 
  feet, 
  

   and 
  just 
  reaching 
  the 
  chalk 
  beneath. 
  The 
  section 
  it 
  here 
  presented 
  

   is 
  as 
  under 
  (fig. 
  4). 
  

  

  Fig. 
  4. 
  — 
  Section 
  in 
  Catting 
  near 
  the 
  village 
  of 
  Chilton, 
  at 
  B,fig. 
  1, 
  

  

  enlarged. 
  

  

  >0 
  

  

  1 
  "1 
  L_*h-^ 
  \ 
  -- 
  i 
  Chalk. 
  

  

  1 
  v 
  

  

  feet. 
  

   1. 
  Surface 
  soil 
  (reddish 
  loam 
  with 
  a 
  few 
  flints) 
  £ 
  to 
  1. 
  

  

  a. 
  Cream-coloured 
  fine 
  chalk- 
  and 
  flint-rubble, 
  showing 
  a 
  deeply 
  

  

  festooned 
  or 
  waved 
  surface 
  6 
  to 
  10. 
  

  

  b. 
  Soft 
  white 
  marl 
  (reconstructed 
  chalk) 
  with 
  shells 
  4 
  to 
  6. 
  

  

  c. 
  Very 
  light 
  yellow 
  chalk- 
  and 
  flint-rubble 
  (with 
  an 
  occasional 
  

  

  black 
  band) 
  2 
  to 
  5. 
  

  

  d. 
  Dark 
  brown 
  clay 
  (almost 
  black 
  in 
  places), 
  forming 
  a 
  line 
  of 
  

  

  separation 
  between 
  the 
  lighter 
  beds 
  above 
  and 
  the 
  darker 
  

   yellow 
  and 
  brownish 
  beds 
  beneath 
  ; 
  two 
  specimens 
  of 
  Pupa 
  

   marginata 
  2 
  to 
  4. 
  

  

  e. 
  Light-yellow 
  flint- 
  and 
  chalk-rubble, 
  fine 
  ; 
  one 
  Pupa 
  3 
  to 
  6. 
  

  

  /. 
  Coarser 
  flint- 
  and 
  chalk-rubble 
  ; 
  bone 
  of 
  Bison 
  5 
  to 
  10. 
  

  

  In 
  the 
  lower 
  half 
  of 
  the 
  drift 
  there 
  were 
  found 
  irregularly 
  dis- 
  

   persed 
  in 
  various 
  parts 
  of 
  the 
  cutting 
  a 
  few 
  blocks 
  of 
  very 
  hard 
  and 
  

   compact 
  Sarsen 
  stone 
  (Lower 
  Tertiary 
  Sandstone). 
  Two 
  of 
  the 
  

   largest 
  measured 
  2 
  ft. 
  x 
  10 
  in. 
  x 
  9 
  in. 
  and 
  1 
  ft. 
  9 
  in. 
  x 
  1 
  ft. 
  6 
  in. 
  

   X 
  10 
  in. 
  The 
  angles 
  were 
  rounded 
  ; 
  but 
  otherwise 
  they 
  were 
  not 
  

   much 
  worn. 
  

  

  In 
  the 
  beds 
  c 
  and 
  / 
  were 
  some 
  grains 
  of 
  glauconite, 
  derived 
  pro- 
  

   bably 
  from 
  Lower 
  Tertiary 
  sands 
  ; 
  and 
  the 
  clay 
  of 
  bed 
  d 
  may 
  be 
  

   derived 
  from 
  some 
  of 
  the 
  Tertiary 
  clays. 
  The 
  black 
  band 
  in 
  c 
  is 
  

   caused 
  by 
  the 
  admixture 
  of 
  a 
  sooty 
  manganese 
  peroxide. 
  

  

  The 
  fragments 
  of 
  chalk 
  mostly 
  vary 
  from 
  the 
  size 
  of 
  a 
  pea 
  to 
  that 
  

   of 
  a 
  bean. 
  Some, 
  which 
  consist 
  of 
  soft 
  chalk, 
  are 
  worn 
  and 
  rounded 
  ; 
  

   but 
  others, 
  which 
  consist 
  of 
  a 
  very 
  hard 
  chalk, 
  are 
  flat 
  and 
  sub- 
  

  

  