Groundbreaking research has unveiled remarkable details about a vast circle of Neolithic pits surrounding Durrington Walls, confirming them as Britain's largest known prehistoric structure. The massive pits, first identified in 2020, have now been subjected to cutting-edge scientific analysis revealing their human origin, precise dating, and environmental context. Archaeologists from the University of Bradford and international partners have transformed our understanding of these enigmatic features through innovative techniques including environmental DNA analysis and advanced dating methods.
The circular arrangement of pits forms a boundary over two kilometers wide, enclosing more than three square kilometers around the Durrington Walls henge and Woodhenge monuments. Each pit measures up to 10 meters across and five meters deep, making this discovery unprecedented in British prehistory. According to the University of Bradford, researchers have moved beyond simply mapping these features to exploring their origins and environmental context through sophisticated scientific techniques.
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Advanced Scientific Methods Reveal Pit Construction
The research team employed an impressive array of modern archaeological techniques to investigate the pits. Borehole coring provided physical samples from deep within the features, while sediment analysis and geochemistry revealed their composition and formation processes. Most significantly, the application of Optically Stimulated Luminescence (OSL) dating and environmental DNA (sedaDNA) analysis has enabled researchers to reconstruct the story of these colossal earthworks with unprecedented precision.
Early findings confirm that the pits are definitively human-made and date to the Late Neolithic period, with the OSL studies now indicating a date of c. 2480 BC, contemporary with the construction of Durrington Walls itself - around 4,500 years ago. Most pits reach depths between 4.5 and 6.9 meters, with fine clay-silt layers indicating they filled in gradually over time rather than being deliberately backfilled. The sedaDNA and soil chemistry analysis has revealed what plants grew in the vicinity, offering invaluable clues about how these pits interacted with the surrounding landscape.
Dr Tim Kinnaird, who conducted these analyses at the School of Earth and Environmental Sciences Dating Laboratory at the University of St Andrews, said:
“The new dating evidence, coupled with the remarkably consistent geochemical signature seen within the fills at the pits provides definitive evidence that they were constructed by people living at the site over a very short time period. The synchronous timing of this could only have been achieved by a dedicated and coordinated action.”
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Landscape setting of the Durrington pit group, and other major monuments. (© Crown copyright and database rights 2013 (OS Profile DTM Scale 1:10000); EDINA Digimap Ordnance Survey Service (100025252) http://digimap.edina.ac.uk /© LBI ArchPro)
Sacred Boundaries and Ceremonial Landscapes
Professor Vince Gaffney, lead archaeologist from the University of Bradford, emphasized the extraordinary nature of the discovery. "The recent work confirms that the circle of shafts surrounding Durrington Walls is without precedent within the UK," he stated.
"These features were not simply dug and abandoned – they were part of a structured, monumental landscape that speaks to the complexity and sophistication of Neolithic society."
The research represents a significant shift in archaeological understanding, moving the conversation from "big mysterious holes" to comprehending their purpose, chronology, and environmental setting. Archaeologists now believe the pits may have marked a sacred boundary linked to ceremonial activity at Durrington Walls, potentially echoing cosmological ideas that shaped the entire Stonehenge landscape. This interpretation suggests that Neolithic communities possessed sophisticated concepts of sacred space and ritual geography.
Professor Richard Bates from the University of St Andrews, who was part of the geophysical investigation team, said:
“The skill and effort that must have been required to not only to dig the pits, but also to place them so precisely within the landscape is a marvel. When you consider that the pits are spread over such a large distance, the fact they are located in a near perfect circular pattern is quite remarkable.”
The western wall of Durrington Walls, part of the massive Neolithic henge complex. (Ethan Doyle White/CC BY-SA 4.0)
International Collaboration Unlocks Prehistoric Secrets
This groundbreaking work forms part of the Stonehenge Hidden Landscapes Project, an international collaboration led by the University of Birmingham and the Ludwig Boltzmann Institute for Archaeological Prospection and Virtual Archaeology. Partners include the University of Bradford, University of St Andrews, University of Warwick, University of Wales Trinity Saint David, and Ghent University. The project operates under the auspices of the National Trust and English Heritage, demonstrating the importance of collaborative research in understanding Britain's prehistoric monuments.
The application of environmental DNA analysis represents a particularly innovative aspect of the research. By extracting and analyzing ancient DNA preserved in sediment layers, scientists can identify which plant species grew near the pits thousands of years ago. This information provides crucial context for understanding how the landscape looked during the Neolithic period and how these monumental features functioned within their environmental setting. Such techniques are revolutionizing our ability to reconstruct ancient landscapes and understand how prehistoric communities interacted with their surroundings.
The discovery continues to reshape our understanding of Neolithic Britain, revealing increasingly complex social organization and ceremonial practices. As research progresses, these massive pits are likely to yield even more secrets about the people who created Stonehenge and its surrounding landscape, one of the most remarkable prehistoric complexes in the world.
Top image: Durrington Walls earthwork viewed from above, showing the scale of the prehistoric monument. Inset; Animation illustrating the landscape setting of the Durrington pit group. Source: Midnightblueowl/Public domain Inset; © Crown copyright and database rights 2013 (OS Profile DTM Scale 1:10000); EDINA Digimap Ordnance Survey Service (100025252) http://digimap.edina.ac.uk /© LBI ArchPro
By Gary Manners
References
Gaffney, V., Baldwin, E., Allaby, R., Bates, M. et al. 2025. The Perils of Pits: further research at Durrington Walls henge (2021–2025). Available at: https://intarch.ac.uk/journal/issue69/19/index.html
University of Bradford. 2025. New research uncovers secrets of Stonehenge's vast Neolithic pits. Available at: https://www.bradford.ac.uk/news/archive/2025/new-research-uncovers-secrets-of-stonehenges-vast-neolithic-pits.php
University of St Andrews. 2025. New analysis confirms details of massive pit structure surrounding Durrington Walls henge, Wiltshire. Available at: https://news.st-andrews.ac.uk/archive/new-analysis-confirms-details-of-massive-pit-structure-surrounding-durrington-walls-henge-wiltshire/
