The Alluvial Geoarchaeology of the Upper River Kennet in the Avebury Landscape: a Monumental Transformation of a Stable Landscape

French, Charles, Carey, Chris, Allen, Michael J, Toms, Philip ORCID: 0000-0003-2149-046X, Wood, Jamie ORCID: 0000-0003-0923-5511, De Smedt, Philippe, Crabb, Nicholas, Scaife, Rob, Gillings, Mark and Pollard, Joshua (2024) The Alluvial Geoarchaeology of the Upper River Kennet in the Avebury Landscape: a Monumental Transformation of a Stable Landscape. Proceedings of the Prehistoric Society. pp. 1-35. doi:10.1017/ppr.2024.6 (In Press)

14172 French, Carey, Allen, Toms, Wood (2024) The Alluvial Geoarchaeology of the Upper River Kennet in the Avebury Landscape - a monumental transformation of a stable landscape.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (3MB) | Preview


Geoarchaeological research as part of the AHRC funded Living with Monuments (LwM) project investigated the upper Kennet river system across the Avebury World Heritage landscape. The results demonstrate that in the early–mid-Holocene (c. 9500–1000 BC) there was very low erosion of disturbed soils into the floodplain, with floodplain deposits confined to a naturally forming bedload fluvial deposit aggrading in a shallow channel of inter-linked deeper pools. At the time of the Neolithic monument building in the 4th–early 3rd millennium BC, the river was wide and shallow with areas of presumed braid plain. Between c. 4000 and 1000 BC, a human induced signature of soil erosion became a minor component of fluvial sedimentation in the Kennet palaeo-channel but it was small scale and localised. This strongly suggests that there is little evidence of widespread woodland removal associated with Neolithic farming and monument building, despite the evidently large timber requirements for Neolithic sites like the West Kennet palisade enclosures. Consequently, there was relatively light human disturbance of the hinterland and valley slopes over the longue durée until the later Bronze Age/Early Iron Age, with a predominance of pasture over arable land. Rather than large Neolithic monument complexes being constructed within woodland clearings, representing ancestral and sacred spaces, the substantially much more open landscape provided a suitable landscape with areas of sarsen spreads potentially easily visible. During the period c. 3000–1000 BC, the sediment load within the channel slowly increased with alluvial deposition of increasingly humic silty clays across the valley floor. However, this only represents small-scale landscape disturbance. It is from the Late Bronze Age–Early Iron Age when the anthropogenic signal of human driven alluviation becomes dominant and overtakes the bedload fluvial signal across the floodplain, with localised colluvial deposits on the floodplain margins. Subsequently, the alluvial archive describes more extensive human impact across this landscape, including the disturbance of loessic-rich soils in the catchment. The deposition of floodplain wide alluvium continues throughout the Roman, medieval, and post-medieval periods, correlating with the development of a low-flow, single channel, with alluvial sediments describing a decreasing energy in the depositional environment.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: Fluvial bedload; Anthropogenic alluvium; Colluvium; OSL dating; Neolithic openness and stability; Monumentalisation
Subjects: G Geography. Anthropology. Recreation > GB Physical geography
G Geography. Anthropology. Recreation > GF Human geography. Human ecology. Anthropogeography
Q Science > Q Science (General)
Divisions: Schools and Research Institutes > School of Education and Science
Research Priority Areas: Place, Environment and Community
Depositing User: Anna Kerr
Date Deposited: 12 Jun 2024 09:57
Last Modified: 12 Jun 2024 10:00

University Staff: Request a correction | Repository Editors: Update this record

University Of Gloucestershire

Bookmark and Share

Find Us On Social Media:

Social Media Icons Facebook Twitter Google+ YouTube Pinterest Linkedin

Other University Web Sites

University of Gloucestershire, The Park, Cheltenham, Gloucestershire, GL50 2RH. Telephone +44 (0)844 8010001.