A Neolithic enclosure wall at Carvin (Pas-de-Calais)

On line since September 19, 2009 · Updated September 19, 2009
The exceptional remains of a fortified Neolithic wall have been excavated at Carvin in the Pas-de-Calais department. This monumental size of the wall and the abundance of archaeological remains at the site make this a remarkable discovery.

The remains of the wall

The site is located very near the Deûle River on a hill bordered by humid zones and surrounded by a system of ditches. Two palisades—one in a trench—and two discontinuous ditches extend concentrically over a surface of 6.5 hectares. Finally, the more "autonomous" trace of a third exterior ditch has been only partially identified.
The ditches, which are from .6 to 3 m wide and.3 to 1.8 m deep, are often interrupted. The dissymmetry of their filling, a recurring phenomenon for this type of structure, indicates the existence and position of a levee. The construction of the two palisades required the felling of several hundred trees. In the palisaded trench, the rectangular posthole traces suggest the presence of planks, which indicate a strict and efficient management of wood.
The extension and anchorage of this installation required a considerable amount of work and thus indicate that this was a long term project. The redigging of some segments of the ditches, along with other modifications, attest to a complex history; meanwhile, the absence of crossings between the series of ditches and palisades, as well as the interruptions, show that the functioning of these structures was at least partially contemporaneous. A large quantity of artefacts—mostly lithic and ceramic—was found in the ditches. We distinguish refuse zones and deposit zones.
Two partially preserved buildings were identified inside the enclosure wall. They are oriented east-west and their rectangular plan resembles that known in some similar sites from the same period. They are around 20 metres long and 7 to 8 m wide. Their frame rests on a central axis of large ridge-tiled posts. The interior space was divided into two parts by narrow ditches perpendicular to the walls.
Finally, numerous Neolithic pits are scattered over the interior of the enclosed surface.

The goals of site excavation and study

This type of site, of earth and wood and monumental in nature, raises many questions. Enclosure walls with multiple ditches and palisades appear in western Europe at the end of the 5th millennium BC (around 4400-4300), during a period when the habitat system becomes more complex: differentiated habitat, habitats implanted in valley bottoms, on plateaus, on stone spurs, etc.
Does a wall such as that of Carvin correspond only to a fortified habitat or did it constitute the central space of a group of farms and villages? In other words, what was the function of such a construction? And what was the role of such a site within the habitat system of this period?
The gigantism of such a site, even if realized in several phases, would have required a remarkably perennial collective effort. What thus was the duration of use of such a site?
Given that there is no stratigraphic crossing between the series of ditches, special efforts were made to find traces of reconstruction of modifications to the initial configuration (creation of a passage where the initial trench was continuous, for example), as well as the symmetries/dissymmetries between trenches. A large number of profiles were realized in order to record the filling processes of the ditches. The study of these fillings recounts a long, complex history that varies in the different sectors. The goal of this study is to determine the rhythm of the phases of construction and abandon of the enclosure wall.
A contextual recording of the density of artefacts and especially their nature (refuse or deposit) is aimed at explaining the nature of the site. Analyses of this abundant documentation (plans, profiles, material culture, traceology, anthracology, alimentary deposits in pots, carpology, etc.) are aimed at defining the nature of the site, the evolution of the installation phases, the full use and abandon of the site and to integrate it within the regional chronocultural landscape. The raw material of certain flint tools, for example, originating from the Spiennes mines (in Hainaut, Belgium) 80 km to the east, show the existence of vast exchange network, which permitted the circulation of humans, objects and ideas.

The first observations of ceramic and lithic artefacts place the site of Carvin in the Spiere group (eponymous site located around forty kilometres north of Carvin, in Belgium): this cultural group of the Middle Neolithic II (according to the French chronology) is contemporary with the northern Michelsberg and Chassean cultures and characterizes western Flanders during this period.

Developer

Artois development 

Site director

Cécile Monchablon, Inrap

Curation

Regional Archaeology Service (DRAC Nord-Pas-de-Calais)

See images

  • General view of the site
    General view of the site
    © Thomas Sagory / www.du-ciel.com
  • Map of the site.
    Map of the site.
    © Marc Canonne et Cécile Monchablon, Inrap
  • Aerial view with the palisade and ditches in the process of excavation.
    Aerial view with the palisade and ditches in the process of excavation.
    © Thomas Sagory / www.du-ciel.com
  • Aerial view with the palisade and ditches in the process of excavation.
    Aerial view with the palisade and ditches in the process of excavation.
    © Thomas Sagory / www.du-ciel.com
  • Aerial view with the palisade and ditches in the process of excavation.
    Aerial view with the palisade and ditches in the process of excavation.
    © Thomas Sagory / www.du-ciel.com
  • Part of a ceramic deposit in the process of excavation. In the foreground, two whole vases are deposited upside down.
    Part of a ceramic deposit in the process of excavation. In the foreground, two whole vases are deposited upside down.
    © Inrap
  • Palisaded trench in the process of excavation, with the traces of three planks in the bottom of the test pit.
    Palisaded trench in the process of excavation, with the traces of three planks in the bottom of the test pit.
    © Cécile Monchablon, Inrap