The wooden artifact widely known as the Clacton Spear (pl. 1) was discovered by Samuel Hazzledine Warren, F.G.S., in 1911. He dug it out of an undisturbed part of the freshwater sediments, probably a peaty seam, exposed on the foreshore at Clacton-on-Sea, c. 80 km ENE of London (Warren 1911; 1914, and in conversation with K.P.O. 1933). On 30th September 1911, Warren conducted a party of members of the Essex Field Club on a visit to see the outcrop of Pleistocene fluviatile deposits on the shore west of Clacton Pier, and in the brief report on this excursion, reference was made to the occurrence of fossil mammalia and Palaeolithic flint artifacts. At first Henri Breuil tentatively identified the worked flints with the Mesvinian industry of Belgium; but after Warren's amassment of a larger collection, he recognized that the Clacton flint artifacts represented a distinct Palaeolithic industry, or tradition, for which he proposed the name Clactonian (see Warren 1922 and 1926; Breuil 1932).
The object of the present communication is to demonstrate the relationships which, in the light of present knowledge, appear to exist between the various Pleistocene and Holocene deposits in the Lower and Middle Thames Valley. For this purpose two cross-sections of the valley have been drawn indicating the relative positions of the deposits which occur at various localities as though they were all present in two localities, one in the Lower, and one in the Middle Thames.As many of the more important deposits in the Lower Thames are represented to the north and south of the river in the Dartford area, we have drawn the one section as if our ideal locality occurred in that neighbourhood. In this section, therefore, the relative altitudes of the various beds above and below present river level are those which are found in that part of the Thames basin. In tributary valleys, or in other parts of the main valley these altitudes are not of course necessarily maintained. In cases where deposits belonging to a particular stage have not been preserved in the Dartford area, but occur in a neighbouring part of the valley, or in a tributary valley, their position in the composite section has been roughly gauged by a process of extrapolation. Similarly when dealing with the Middle Thames, we have drawn our ideal section as though all the deposits occurred in one section of the valley in the neighbourhood of Iver.
The foreshore exposures of Pleistocene deposits at Clacton and at Lion Point, two miles to the south-west, mark cross-sections of an ancient river channel which now extends inland in a broad curve between these two localities. The deposits have become famous through the investigations of Mr S. Hazzledine Warren, who has for many years kept a careful watch on the exposures, and who has published a number of important papers on his discoveries (Warren, 1922, 1923, 1924, 1933, 1934).The gravels in the Clacton channel have yielded a contemporary palaeolithic flake-industry which was recognised by the Abbé Breuil as identical in style with an industry represented in the Middle Pleistocene gravels of Mesvin, Belgium (Warren, 1922). Breuil (1929, p. 6) has since proposed the name of Clactonian for this industry in view of the fact that in the Mesvin deposits the implements in question are in a derived condition, and associated with other industries, whereas at Clacton there is no doubt as to their contemporaneity with the containing gravel. Industries of Clacton style have since been recognised in numerous localities, not only in this country, but also on the Continent (Breuil, 1932). They appear to represent a widespread cultural tradition, possibly of Asiatic origin, and very probably ancestral to the later Mousterian industries.The industry of the type station—the Clacton-on-Sea district of Essex—represents neither the earliest nor the latest stage of evolution of the Clactonian culture, and importance attaches to establishing its exact position in the Lower Palaeolithic sequence.
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