BORINGS  IN  EAST  LINCOLNSHIRE. 
471 
Vol.  49.] 
gravel  beneath,  (3)  in  the  greenish  clay.  The  last  proved  quite  unfit 
for  use,  while  that  in  the  gravel  was  a  weak  spring ;  so  the  bore  was 
plugged  with  clay  up  to  the  base  of  the  mass  of  chalk,  and  the 
supply  from  that  was  found  to  be  satisfactory  and  sufficient,  though 
not  abundant.  Mr.  Eardley  Mason  informs  me  that  the  results  of 
analysis  were  as  follows  : — 
Total  solid  residue  . 
Lime  . 
Magnesia . 
Oxidizable  organic  matter  only  .  . 
33-04  grs.  per  gallon. 
12-07 
3-13 
0-11 
3? 
?> 
55 
The  following  is  an  abstract  of  the  results  obtained  by  this 
boring : — 
Lower 
tetaceoi 
Beds. 
Glacial 
Deposits. 
Thick¬ 
ness. 
Depth 
from 
surface. 
Brown  Boulder  Clay  . 
feet. 
30 
feet. 
30 
Gravel  . 
10 
40 
Brown  Boulder  Clay  .  . 
2 
42 
Gravel  . 
6 
48 
Boulder  Clay  . 
6 
54 
Chalk,  part  white,  part  reddish  . 
10 
64 
1  Gravel . . 
5 
69 
wed  clay,  partly  Boulder  Clay,  partly  reddish 
marl  with  quartz-orains . 
11 
80 
Coarse  greenish-brown  sand  . 
12 
92 
Blue  clay . 
2 
94 
Lieht-arev  clav  . 
6 
100 
Blackish  clay,  with  oolitic  grains  . 
54 
1054 
Dark,  greenish,  silty  clay,  with  oolitic  grains 
7-2 
112-6 
In  the  ‘  Geology  of  East  Lincolnshire  ’  (p.  148)  some  details  are 
given  of  a  boring  made  at  Mr.  Soulby’s  Brewery  in  Alford.  At  this 
spot  chalk  was  met  with  at  a  depth  of  38|  feet,  and  continued  to 
65  feet.  This  is  evidently  part  of  the  same  boulder-mass  as  that 
pierced  in  the  Grammar  School  well ;  and  though  its  thickness  is 
greater,  its  base  is  within  a  foot  of  the  same  level.  Chalk  was 
also  met  with  at  only  41  feet  from  the  surface  in  another  well 
in  the  southern  part  of  the  town ;  so  that  a  large  transported 
mass  or  several  such  masses  appear  to  lie  in  the  Drift  under  the 
town. 
This  explanation  of  the  occurrence  of  Chalk  will  be  the  more 
readily  accepted,  when  it  is  remembered  that  the  Drift  is  believed 
to  be  banked  against  a  buried  range  of  Chalk-cliffs  within  a  mile  of 
Alford,  and  consequently  that  the  conditions  are  such  as  to  make 
the  existence  of  large  transported  masses  a  very  probable  matter. 
None  have  yet  been  proved  to  exist  in  East  Lincolnshire  ;  but  very 
large  boulders  of  Chalk  have  been  seen  west  of  the  Wolds,  and  a  large 
transported  mass  of  Chalk  in  which  a  quarry  has  been  opened  occurs 
