266
NOTES ON ESSEX GEOLOGY.
out our own publications, which ought to be known to all our
members. These notes are really done for the Essex Field
Club and not for the world at large, which latter body, of course,
should take into account the work of the former. What I
have sought to do is to give you some sort of idea of what geologic
work has been done on our county from outside the Club.
Papers on Essex geology have mainly appeared in three
publications, the Journal of the Geological Society, the Proceedings
of the Geologists' Association and the Geological Magazine.
Secondly, I have had to neglect the accounts of the various
Excursions of the Geologists' Association, in which there is much
relating to Essex.
Thirdly, papers dealing essentially with questions of water-
supply have been neglected, for the good and sufficient reason
that they are being dealt with elsewhere, in a Memoir on the
water-supply of the county.
Fourthly, various short notes and incidental references have
been passed over. But I trust that nothing of importance has
been missed.
Considering the length of this address, I think that you
ought to be grateful to me for the above-noted omissions, and
I hope that you will bear with a few remarks made on some
of the works noticed.
Of course the following notes are only indications to workers
in various geologic fields as to where they must look for informa-
tion. They may be enough or more than enough for most of
you, but the specialist must labour for himself.
1890.
In his paper on the Westleton Beds (part ii.) Sir J. Prestwich
devotes some pages to Essex.1 He classes with these beds the
gravel of Walton-on-Naze, with doubt part of that of the cliffs
westward from that place to Clacton, some in the Sudbury
district and near Marks Tey, near Witham, Braintree, Thaxted
etc. But in all these cases, despite the pebbly character of
the gravels, I am inclined to adhere to the classification of
the beds with the gravel below the Boulder Clay (generally
known as Middle Glacial) rather than "with the older gravels
1 Quart. Journ. Geol. Soc., Vol. xlvi., pp. 128-136, 144, 245.