Yol.  49.J 
PEBBLES  FROM  THE  GLACIAL  DRIFT. 
313 
There  is  a  south-west¬ 
erly  dip  which  may  be 
due  to  a  landslip.  The 
gravel  is  composed  of  the 
following  materials  : — 
(a)  Flints,  black  inter¬ 
nally  ;  large  broken 
flints,  and  large  flints 
very  slightly  rolled  or 
worn  (from  the  Chalk 
of  the  neighbourhood). 
( b )  Flint-pebbles  abundant. 
(c)  Sarsens  from  Tertiary 
Beds  or  older  gravels. 
( d )  Brown  subangular  flints 
from  older  gravels. 
(e)  White  quartz,  with 
some  pink  pebbles  and 
some  large  brown  peb¬ 
bles — too  abundant  for 
Southern  Drift.  Both 
( a )  and  ( e )  are  too 
abundant  for  Westleton 
Shingle. 
(f)  Black  pebbles,  with 
quartz-veins. 
(g)  Quartzites  and  sand¬ 
stones,  Glacial  Erratics. 
Bed  and  brown  quartz¬ 
ites  abundant ;  speci¬ 
mens  of  red  pebbles 
measured  4"3  X  2'8  x  2 
inches  and  8'5  X  5‘75  X  4 
inches. 
White  and  brown  sand¬ 
stone-pebbles. 
(h)  Blocks  of  white  quartz ; 
specimens  measured 
9x6x3^  inches  and 
5-^x4|x3|  inches  = 
Glacial  Erratics. 
(«)  A  pebble  of  quartz-grit 
=  Glacial  Erratic. 
(7c)  Igneous-rock  boulders 
=  Glacial  Erratics. 
I  could  find  no  frag¬ 
ments  of  which  it  could 
be  safely  affirmed  that 
they  were  from  the  Lower 
Greensand.  The  gravel 
bears  the  strongest  re¬ 
semblance  to  the  Glacial 
Gravel  mapped  on  the 
opposite  side  of  the 
Thames  (at  Littleworth 
Common,  for  instance), 
and  the  level  is  about  the 
same. 
Q.  J.  G.  S.  No.  195. 
02 
Section  from  East! lamf  stead  Plain  to  the  Thames  at  Marlow. 
