388 
LOWER OOLITIC ROCKS OF ENGLAND : 
A section in a clay-pit (now abandoned), on the Bourton road, 
near Buckingham, showed, below the Cornbrash, the following 
strata, which were noted by Prof. Green * : 
[Great Oolite 
Clay.] 
[Great Oolite 
Limestone] . 
f Dark blue laminated clay 
I White marly chalk-like limestone 
I Hard yellowish sandy limestone 
Stiff blue clay, with broken shells 
I lignite, and pyrites - 
I Very stiff dark blue clay 
j^Blue and yellow mottled clay - 
White Limestone. 
FT. 

1 
1 
5 
4 
3 
IN. 
4 


6 


These beds were regarded by Mr. T. K. Polwhele as about the 
horizon of the Forest Marble. 
Buckingham to Silverstone, Stony Stratford, and 
Newport Pagnell. 
At the Lime-kiln north of Boycot, the following section was 
shown \ : 
Great Oolite 
Limestone. 
Stony Drift Clay. 
Rubbly stone - 
Greenish clay I Ogtbed . 
White Marl J 
Bands of marl and rotten marly oolitic 
stone, with occasional hard beds : 
Nerincea abundant in top stone 
FT. IK. 
- 15 
This section may be compared with that at Kirtlington, and 
with the beds 25, &c., in the railway-cutting near Hook Norton 
p. 330). 
At the Lime-kiln, east of Silverstone, the strata shown were as 
follows : 
r Gravel - 
Drift. < Stony clay, with Boulders (in part re- 
L arranged Great Oolite Clay) - 
["Bubbly stone and marl, with Ostrea, 
I Sowerlyi, and other Bivalves 
Great Oolite I Rubbly oolitic stone ... 
Limestone. *\ Yellow oolitic limestone, rather a 
] crumbly stone ; otherwise in character 
like the Bedford Great Oolite 
FT. 
5 
IN. 

8 
Ostrea acuminata occurs in the top (Drift) clay. 
In the valley south-west of Thornborough the following section 
was noted by Prof. Green J : 
* Green, Geol. Bantury, p. 31. 
f See also Green, Geol. Banbury, p. 20 
j Geol. Banbury, p. 31. 
