OREAT OOLITE SERIES: BRACKLET. 387 
FT. Iir. 
Surface soil with fragments of Cornbrash 3 
rr i , n r , f Laminated, dirty-blue clay, full of 
Clav 1 1 y sters ' ' -40 
L White rubbly marl . - 2 
rr( f n,vrf f -H- Hard, solid white limestone -30 
Lfmestonel 1 Rubbly limestone and clay about 3 3 
' J L Hard, solid, white limestone 5 
Quarries near Evenly and Mixbury showed alternations of 
white limestone and clay, and pale sandy limestone and sandstone, 
from 8 to 12 feet thick. These sandy beds occur likewise in the 
area between Brackley and Buckingham. 
A section on the railway at Gretworth (or Greatworth) beyond 
Farthingho, on the Banbury ajid Northampton line, was recorded 
as follows by Mr. Beesley* : 
FT. I*. 
Great Oolite (white limestones and marls). 
Northampton Sand (pure sand) - - 12 
Upper Lias. 
At the base of the white limestones and marls, beds of dark 
blue clay (Upper Estuarine Series) were observed at Souldern, 
Newbottle, and again between Brackley and Helmedon.f 
In the section north-east of Newbottle Spinney, the clay was 
overlaid by flaggy beds of gritty and oolitic limestone. Similar 
beds were shown to the north-east of Newbottle church. They 
yield Cardium subtrigonum, Modiola imbricata, Ostrea Sowerbyi 
(and acuminate form), Rhynchonella concinna, Terebratula maxil- 
lata, and Clypeus Mulleri. (See Fig. 49, p. 176). 
A number of sections between Brackley and Buckingham have 
been described by Prof. Green. Large quarries, between West- 
bury and Shalstone, showed the intercalation of sandy strata 
among the white limestones ; and shallow quarries in the white 
limestones, showing shelly and oolitic beds, were to be seen south 
of Turweston and south-east of Fulwell near Westbury. Other 
sections were to be seen on the borders of Stowe Park and 
"Whittlewood Forest. 
The junction with the Forest Marble or Great Oolite Clay 
is difficult enough to determine, but we may confidently assign to 
that division the beds so indicated in the section at Thornborough, 
by Prof. Green. We may also group the similar beds, 8 feet 
thick, seen by Prof. Green, near Hogholes Farm west of Stowe ; 
and the 3 or 4 feet of dark-blue clay seen on top of the Great 
Oolite at Buffler's Holt to the south of Stowe Park, at RadcTiff 
west of Buckingham, and on the road to Gawcott, near 
Buckingham. J 
The following sections will be of service in showing the 
characters of the strata. 
* Proc. Warwickshire Field Club, 1872, p. 37. 
t Green, Geol. Banbury, p. 16. 
j Geol. Banbury, pp. 20, 21, 3J. 
B 13 2 
