File:The Quarterly journal of the Geological Society of London (13204980744).jpg

OF NOKTH OXFORDSHIRE AND THE CLTPEUS-GRIT.
233
by separated valves. of Rhynclionella cynocephala from my own cabi-
net, and Terebratula simplex from that of Mr. T. J. Slatter, F.G.S.
It would appear as if there are here some remains of beds of a lower
zone, or of material derived from them, though the section is
unfortunately so small as not to allow satisfactory determination.
The fauna of series B and C of Hook Norton is very similar, except-
ing, however, the last-named species.
A little higher up the hill a sand-pit exposes the plant-beds, D ;
and in the roadside quarries nearer Great Rollright the ridge is
crested with beds of sandy siliceous limestones representing series E.
Attention must here be called to the fact that at the north end of
the ridge called Otley Hill, immediately above the Upper Lias, is the
outcrop of the so-called " Northampton Sands " (Hook-Norton type),
whilst two miles further south-westward, on the north and south
flanks of the part called Bright Hill, whereon stands the well-known
circle of the Rollright stones, crops out the Clypeus-Grit (Cotteswold
type), richly stored with its characteristic fossils and resting also
upon the Upper Lias.
At Whichford, about two miles west of Otley Hill, a roadside
quarry yields Astarte elegans &c. At the Grayton pit, further
up the hill, the higher beds are extensively worked, and a stratum
abounding with separated valves of Trigonia signata can be clearly
traced. The section as measured is : —
ft. in.
1. Humus 1
2. Cream-coloured siliceous limestone 6 6
3. Sanely limestone with T. signata, passing into No. 4 10
4. Blue-hearted limestones, with wood ; base not shown 3
Fig. 2. — Vertical Diagram Section, Sharpshill,
Otley Hill (Scale 1 : 144.)
1^ mile JV~. of
Great Oolite
Marls and clays.
E. Siliceous Limestone
E. Siliceous Limestone
D. Sands and Limeston
C. Oolitic earthy Limestone
Trigonia signata and sp.
Monodonta Labadyei.
Amm. Parkinsoni.
Gervillia Icevis, Avicula braambu-
riensis, Ostrea Knorrii, and Tri-
gonia costata.
Chipping Norton. — Upon taking to the Chipping-Norton road and
descending the hill to the Dip valley, one notes, in the fields to the
Bridge, the outburst of springs marking the