Vol.  49.] 
BOEINGS  IN  EAST  LINCOLNSHIRE. 
473 
Thick¬ 
ness. 
Depth 
from 
surface. 
f  Pale  blue  and  grey  clays  . . . 
ft.  in. 
6911 
ft.  in. 
200 
Hard  dark-blue  clay  . 
1 
201 
Brown  and  blue  clav . 
10 
211 
%J 
Hard  clay  . . . 
9 
220 
Clav  and  sand  . 
6 
226 
Blue  clay,  sand,  and  shells  . . . . . . 
18 
244 
Clavs 
159  feet.  ' 
Clay  and  sand,  fossils  . 
1 
245 
Sand  . 
2 
247 
Clay  and  sand  . 
14 
261 
V 
Hard  brown  clay  and  stones  T?  Sentaria  1  . 
3 
264 
Blue  clay,  sand,  and  fossils  . 
9 
273 
Clay  and  fossils  . 
7 
280 
Blue  clay . 
8  6 
288  6 
Brown  clay  . 
—  6 
289 
Oolitic 
v_  t/ 
f  Brown  clay  and  stone  . . 
1 
290 
T  ron  ston  pi 
Brown  clay  and  soft  sandstone  . 
6 
296 
Beds  1 
Blue  clay  and  fine  white  sand  . 
6 
302 
13£  feet. 
Hard  stone  . 
—  6 
302  6 
f  Hard  dark-blue  clay  . 
10  6 
313 
?  Clays 
18-g  feet. 
Liffht-blue  clay  and  silt  . 
6 
319 
Stone  band  . 
—  6 
319  6 
Hard  light-coloured  clay  . 
1  6 
321 
rGrey  sand,  with  water  . 
2 
323 
Spilsby 
Sandstone  - 
26  feet. 
Brown  sand  and  sandstone  . . 
10 
333 
Sandstone . 
4 
337 
Grey  sandstone  . 
8 
345 
Hard  stone  . 
2 
347 
^Clay-stone  . . . 
1 
348 
Hard  blue  clay  . 
15 
363 
Kimeridge 
Clay 
78  feet. 
Light-blue  clay,  with  flints  [?  Septaria]  . 
1 
364 
Blue  clay  and  fossils  . 
40 
404 
[Not  described]  . 
9 
413 
Blue  clay  and  fossils  . . . 
2 
415 
Blue  clay,  fossils,  and  black-brown  dirt  . 
10 
425 
Very  few  remarks  on  the  above  seetionwillsuffi.ee.  The  4  red 
marl  ’  probably  includes  pink  and  red  chalk,  and  possibly  some 
Carstone  mixed  with  red  marl  carried  down  by  the  boring-tools. 
A  sample  from  297  feet  was  a  bard  oolitic  marlstone  with  grains 
of  iron  peroxide. 
This  account  gives  a  greater  thickness  to  the  Spilsby  Sandstone : 
26  instead  of  19  feet,  which  is  more  in  accordance  with  probability. 
Comparing  it  with  the  Willoughby  boring,  the  greatly  increased 
thickness  of  the  clays  and  ironstones  is  here  the  principal  feature,  the 
total  thickness  between  the  base  of  the  Carstone  and  the  top  of  the 
Spilsby  Sandstone  at  Skegness  being  nearly  220  feet,  while  at 
Willoughby  it  is  only  169  feet. 
§  4.  Geneeal  Conclusions. 
The  most  important  conclusion  to  be  derived  from  the  results  of 
the  borings  above  described  is  that  the  subterranean  outcrop  of  the 
Q.  J.  G.  S.  No.  195.  2  1 
