The short tabular description of the two groups is supplemented
in each case by a more particular discussion of the chief points,
with comments on their significance in the correlation.
One of the most valuable results of this boring is that while the
sequence, so far as it goes, is approximately similar to that found
in the well-known Sub-Wealden boring made over 35 years ago
near Battle, in Sussex, the site of which is distant about 19 miles
south-eastward from Penshurst, we are enabled, on the other
hand, to correlate the strata with the proved sequence at Pluckley
and at Brabourne, and thus to link up the hitherto isolated results
of the Battle boring with the very different sections obtained
from the recent explorations in north-east Kent.
The Wealden and Ptjbbeck Section.
Lower portion

of
Hastings Beds
(cont. on p. 69).
Wealden and Purbeck at Penshurst.
Thick- Depth from



ness.
Feet.
surface.
Feet.
orl
or >



Superficial : — soil 1 ft. : sand and gravel )
2 ft j

Pale yellowish fine-grained sand-rock or"
soft sandstone with bands of silty or
sandy shale

Dark blue shaly clay

Yellowish soft sandstone and sandy shale \
as above /

Mottled red and grey sandy clay

Yellowish soft sandstone, 'with shaly")
partings and a 1-ft. band of mottled >
red and grey clay ... ... ...J

Mottled red and grey shaly clay

Yellowish-grey and greenish-grey fine- )
grained sandstone with shaly partings )

Brown, dark blue, and greenish silty or \
sandy clay and shale /

Sandy shale, predominantly pale grey and
silty, but occasionally dark grey and
greenish ; with some bands of soft
yellowish sandstone: fragmentary plant-
remains abundant, and a layer of
cyprids noticed at depth of 359 ft. ...
