160 LOWER OOLITIC ROCKS OF ENGLAND: 
elsewhere in the neighbourhood there is to be found 6 feet of 
flaggy oolite representing the Chipping Norton Limestone. 
It is difficult to fix horizons in the beds in this neighbourhood, 
and it is likely that more than one zone of the Inferior Oolite may 
be represented in the calcareous sandy beds, some of which are 
obscurely oolitic. Fossils are not abundant; we may find Ostrea 
and Trigonia signata, Galeolaria socialis, and Lignite, but otherwise 
our search may be unrewarded by any zonal species, for Trigonia 
signata does not appear to characterize any definite horizon. 
Very fine examples of this fossil were obtained by Mr. Windoes 
and the late S. Stutterd from a pit near Priory Farm, on Hey- 
throp Common. It locally forms a Tngwiza-hed, that occurs in 
the upper part of the sandy limestones, which have been exposed 
to a depth of about 12 feet, at Swerford Park and Great Tew. 
The lower portion of this sandy development of the Inferior 
Oolite Series, comprises layers of hard blue-hearted calcareous 
sandstone, like the L;>wer Calcareous Grit, and in places it is 
conglomeratic. These beds have been quarried to the N.W. of 
Little Tew and S.W. of Great Tew, where they are shown to a 
depth of 12 feet. The section north of Heythrop Common is as 
follows : 
FT. IN. 
Brown clay. 
f Rubbly oolitic stone with Ostrea - - 1 
Marly Ostfrea-bed, with small concretionary 
nodules of calcareous sandstone at the 
Inferior base ... - 1 
Oolite <( Flaggy calcareous sandstone, with Trigonia 
Series. signata - - 1 to 1 6 
Sandy and flaggy, false-bedded calcareous 
sandstone, with nodules of similar rock 
in upper part - - 6 
North of Showell Farm, and again eastwards near the turning 
to Little Tew, we find flaggy and marly oolite, 6 to 8 feet thick, 
with Ostrea and Qasteropods ; these beds rest on calcareous 
sandstone and sand, the former sometimes obscurely oolitic. 
By the park-drive, a little north-west of Heythrop Church, 
there are extensive quarries, where beds of coarse-grained and 
more or less shelly oolite have been worked to a depth of nearly 
20 feet. The beds contain spines of Echini, Ostrca, and very 
small pebbles of quartz : they are more massive at the base and 
rubbly on top, and have furnished much building-stone for the 
neighbourhood. The beds are very irregular and false-bedded. 
In places a thick Oyster-bed is to be seen in the quarries on the 
north-eastern side of the drive. It occurs, in irregular masses, 
5 feet thick in places, and composed of pale marly oolite crowded 
with Ostrea, with occasionally Lima cardiiformis and pebbles of 
oolite : it dies away more or less abruptly into loose marly oolite. 
It is overlaid by 8 or 10 feet of oolite, part of which is worked for 
building-stone, and it is underlaid by 4 feet of stone, also worked. 
The upper portion of this division is seen in a quarry north- 
east of Enstone, where about 12 feet of fissi'e and false-bedded 
