224 LIAS OF ENGLAND AND WALES: 
The bids arc much shattered in places, and the joints, which 
present a series of miniature step-like faults, are filled with clay, 
derived from the Upper Lias. The Transition Bed (see p. 228) 
is not so distinctly shown as elsewhere in the neighbourhood, being 
probably welded on to the Marlstone as it is at Tiltou in Leicester- 
shire. 
The railway-cutting north of the high road, showed the lower 
beds beneath about 9 feet of the Marlstone : 
FT. IN. 
f 3. Micaceous sandy and ferruginous beds 7 6 
j 2. Hard rock with nodules of grey sandy rock at 
Middle J base. Large Belemnites, Pecten near to den- 
Lias, j tatus, Modiola, Pleuromya, Rhynchonella, 
Saurian Bones (Ichthyosaurus) about 3 
LI. Yellowish and bluish sandy loam - [4 0] 
This section wns also noted by Mr. Beesley, who recorded 
Ammonites spinatus from the Marlstone, and A. margaritatus 
from the lower rock (= bed No. 2).* 
Large specimens of Pecten cequivalvts 7 or 8 inches across have 
been found in the Marlstone of Adderbury, and also near 
Chacombe (Chalcombc). 
In a trial-pit in the park at Adderbury, the following beds 
were penetratedt : 
FT. IN. 
f Ferruginous marlstone - - 11 
| Shale - - - 3 
M . , ,, j Grey shelly limestone - --10 
<J Rusty concretionary bed (" ochre ") - 6 
| Shale - 12 
| Pale blue argillaceous limestone with concretions, 
[_ and a concretionary bed below - 1 
Mr. Beesley remarked that the lowest bed here corresponds to 
the calcareous sandstone of Twyford. He adds, " The same bed 
was formerly worked for road metal at Warkworth, one and a 
half miles east of Banbury. It was there a blue marly sandstone, 
four feet thick, and full of fossils. The same bed and the under- 
lying marly clays may be well seen in a brickyard south of 
Deddin'ton. The * Cross ' at Banbury stands upon this stone." 
The lower beds of the Middle Lias were also exposed in the 
railway-cutting west of the high-road between Adderbury and 
Aynho. The section described by Mr. Beesley was as follows! : ~ 
f Rubble of Marlstone. FT. IN. 
| Siliceous marlstone in concretionary blocks, 
] with much calcite - - - 2 
Middle Lias<! gandy shale . -90 
I Concretionary blocks. 
I^Dark blue laminated clays. 
The lowest beds of blue clay, of which only a few feet were 
seen, were referred to the zone of A. capricornus by Mr. Beesley, 
but it is questionable (in the absence of fossil evidence) whether 
that zone was reached. 
* Proc. Geol. Assoc., vol. v. p. 167. 
f T. Beesley, Proc. Warwickshire Field Club, 1872, p. 15. 
J Proc. Geol. Assoc., vol. v. p. 167. 
