270 LIAS OF ENGLAND AND WALKS : 
The Basement Beds of the Upper Lias are here very rich in 
Ammonites, yielding in addition to those mentioned. A. annulatus, 
A. crassus, A. cornucopia, and A. heterophyllus ; also Bclcmnites 
acutns, Ambcrleya, Avicula t Ostrea, Plicatula, &c.* 
The beds further eastward in the railway-cutting, are slightly 
iaulted in two or three places the Upper Lias being brought 
abruptly in contact with an upthrust mass of Marlstone. 
At the brickyards about a mile from Banbury, on the road to 
Broughton, the Upper Lias clay is dug for making red bricks and 
drain-pipes. On the south side of the road there were exposed 
about 10 feet of bluish-grey and brown shaly clays, with thin 
ironstone bands and selenite. North of the road, about 30 feet of 
bluish shaly clays, mottled blue and brown on top, were exposed. 
The clay is more or less micaceous, it contains much selenite, 
small limestone-concretions and many ochreous and pyritic 
nodules. There are occasional irregular bands of grey earthy lime- 
stone, exhibiting 'cone-in-cone' structure. Ammonites fibulatus 
is the characteristic fossil, a few bivalves also occur, but fossils 
on the whole are scarce. Mr. Walford estimates the full thickness 
of the Upper Lias at this locality at 50 feet. 
Upper Lias fossils may occasionally be found on top of the 
Marlstone or in crevices of the rock on Edge Hill, and the Rev. P. 
B. Brodie informs me that he there found fragments of the Fish 
Bed; but no definite traces of the strata are preserved. Further 
north there is an outlier of the Upper Lias, capped by 
Northampton Sands, on the Burton Hills, near Burton Dassett. 
* See T. Beesley, Proc. Geol. Assoc., vol. v. p. 168; and Wright, Lias Ammonites 
( Palaeontograph Soc.), p. 128. 
