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Poster communications

L’architecture microscopique des sols construits, un lien oublié entre l’élévation et l’enfoui

Abstract : Within the built volume, the ground is the support of human activities, the surface on which movements take place. Through its modes of construction and maintenance, the floor refers to social representations, techniques, material resources, and activity systems. In France, the discovery of indoor floors is not rare for the Gallo-Roman and modern periods. It is much more common for the Iron Age and the early Middle Ages. But in all cases, when it is not a question of paving or mosaics, the analysis protocols do not seem to be very operational when faced with stratifications whose thickness may be less than a millimeter and whose spatial extension is very limited. The two roundtables in Strasbourg and Auxerre on “constructed soils” (Sapin, 2012; Sapin and Schwien, 2013), have shown the urgency that there is to address more systematically this type of remains. In spite of this, the soil is often forgotten. It is the poor relation of the syntheses on architecture, construction and buildings. However, on a European scale and in near and middle eastern contexts, the geoarchaeological analysis of soils has largely shown all the potential information that it could provide on social, technological, economic and symbolic issues. In some cases, the coupling of micromorphological and archaeobotanical approaches has made it possible to reconsider interpretations and to re-evaluate the place of agricultural practices in urban contexts. For the early medieval period, an inventory carried out in northern France showed that the preservation of indoor soil sequences is not as rare as presumed, but that geoarchaeological approaches were still non-existent, contrary to some pre- and proto-historic or foreign contexts. From case studies in preventive contexts, it is therefore shown how a geoarchaeology of built soils can be applied and practiced and what the results can be. The micromorphology of archaeological soils is mainly used. It has made it possible to document the nature of the materials of the constructed soils, manufactured, resulting from choices and complex manufacturing processes. For soils still called “earthen” in a simplifying manner, it has been shown that their constitution is continuous, permanently associating manufacture, use and maintenance. Waste is trapped in these layers, compacted and fragmented in place. They then constitute the support of the surfaces of circulation and can be used as construction materials, in particular for what concerns the excrements. The maintenance of surfaces is informed by the continuous deposition of ash, and the cleaning of surfaces by erosion and micro-local dismantling of sub-horizontal organizations. These erosions may result in the displacement of aggregates containing fragments of soil sequences, or even the creation of black earth.
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Poster communications
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Submitted on : Thursday, November 18, 2021 - 11:54:41 AM
Last modification on : Tuesday, November 30, 2021 - 3:36:22 AM
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  • HAL Id : hal-03434454, version 1



Quentin Borderie. L’architecture microscopique des sols construits, un lien oublié entre l’élévation et l’enfoui. Inrap. Archéologie préventive sur le bâti : 5e séminaire scientifique et technique de l’Inrap, Oct 2021, L’Isle-sur-la-Sorgue, France. Archéologie préventive sur le bâti : 5e séminaire scientifique et technique de l’Inrap, 28-29 octobre 2021, L’Isle-sur-la-Sorgue., 2021. ⟨hal-03434454⟩



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