File:The Quarterly journal of the Geological Society of London (13365247245).jpg

260
PROCEEDINGS OF THE GEOLOGICAL SOCIETY. .JaU. 23,
Ostrea, small species. Rostellaria ?
Pectunculus Plumsteadiensis, Sow. Teeth of Lamnse.
Pyrula tricostata, Desk.
Hence this bed may be traced by Old Basing, Odiham, Farnham*,
to Guildford, where an interesting section of it was exposed on the
line of railroad a few hundred feet north of the present station.
(See fig. 6.)
Fig. 6. — Section at Guildford.
fBro^rn London clay mthout fos-
sils, passing downwards into
yellowish sand, and then into
"e," mixed yellow sand and
clay and green sand ; full of
round flint pebbles, but without
organic remains.
Yellow sandy clay full of shells,
perfect and in fragments .Cy-
rena, Cerithhim, and Ostrea).
2. Very dark clay mottled red.
3. Light greenish clay mottled
red, passing down into mottled
clays of different colours and
sands.
The junction with the chalk is not exposed. The outcrop of this
latter is however seen a few yards nearer Guildford. This section is
of much interest from the circumstance of a thin layer (1 of c?) of
the fluviatile shells of the Woolwich beds occurring on the top of the
mottled clays and under stratum "c." This is the most westerly
point at which these shells have, I beheve, been yet observed. They
consist of several species of Cyrena, Cerit?iium, and Ostrea. The hne
of separation between beds *'c" and "^" is waved and irregular.
Passing by Leatherhead, Epsom, and Ewell to Croydon, no good
section of this bed is exhibited ; indications of it occur only here and
there. It then trends suddenly to the north, but still it is not exposed
until we reach Lewisham, where, in one of the pits near the summit
of Loam-pit Hill, the London clay, with a thin basement conglo-
merate bed, may be seen overlying a bed of light-coloured sand. (See
fig. 7.)
Fig. 7. — Section at Loam-pit Hill.
a. Brown clay mixed with flint gravel.
b. London clay; laminated brown clay with septaria oc-
casionally. No organic remains yet found.
c. Round flint pebbles in brown clay, and in places sand.
No organic remains.
d. Light yellow and whitish sa
8 to 10 feet exposed.
The pits lower down the hill show in disconnected sections the

• Two miles W.N.W, from this to^Yn T have recently found in a brook above
  

Lower Old Park Farm, detached blocks with numerous fossils of this " Basement