The Bluestone Enigma

March 26, 2026 Trebor2510

Contents

1 Introduction
2 PodCast
3 Author’s Biography
4 Exploring Prehistoric Britain: A Journey Through Time
5 Further Reading
6 Other Blogs

Introduction

The Bluestone quarry sites give us compelling evidence of the Mesolithic construction dates of Stonehenge (The Bluestone Enigma)

The papers published by researchers from the University of London, Southampton, and Manchester, including Mike Parker-Pearson and his team, regarding the discovery of the quarries at Craig Rhos-y-Felin and the bluestone megaliths at Carn Goedog have been a significant contribution to our understanding of Stonehenge’s origins. This research brought to light the fascinating theory that Stonehenge was originally built in Wales and later transported to Salisbury Plain around 500 years later.

This groundbreaking discovery not only captured the attention of archaeologists worldwide but also challenged previous assumptions about the methods and motivations behind Stonehenge’s construction. The idea that these bluestones were quarried and shaped in Wales before making their journey to Salisbury Plain adds a new dimension to our understanding of prehistoric peoples’ capabilities and social organisation.

This revelation suggests a remarkable level of dedication and coordination among ancient communities. The logistical feat of transporting these massive stones over such a distance, and the decision to do so centuries after their initial quarrying, hints at the profound significance these stones—and the monument they came to form—held for the people of the time.

As someone deeply interested in the mysteries of ancient civilisations, I find the implications of this research thrilling. It deepens our appreciation for the ingenuity and spiritual dedication of our ancestors and opens up new avenues for exploring the cultural and religious ties that connected different regions of prehistoric Britain.

Prescilli Mountains in Wales – The Bluestone Enigma

Craig Rhos-Y-Felin

The publication of the report “Craig Rhos-y-Felin: a Welsh bluestone megalith quarry for Stonehenge” in the December 2016 edition of Antiquity Magazine unveiled intriguing findings about the origins of the bluestones used in Stonehenge. This study, which identified a 4m long monolith at Craig Rhos-y-Felin as microscopically identical to the bluestones at Stonehenge, has sparked significant debate and speculation within the archaeological community and beyond.

Despite the excitement generated by these findings, the report’s focus on two radiocarbon dates that align with the authors’ hypothesis on Stonehenge’s construction date has raised questions about the completeness of the narrative presented to the public. The discrepancy between these dates and the hoped-for evidence led to the speculative suggestion that Stonehenge was originally constructed in Wales and later relocated to Salisbury Plain. This narrative, while intriguing, illustrates the complexities and challenges of interpreting archaeological data, as well as the temptation to fit new evidence into pre-existing hypotheses.

However, a more detailed analysis of the report reveals a wealth of Mesolithic carbon dates obtained from human-made hearths, suggesting a much earlier period of human activity at the site than the two Neolithic dates highlighted. These Mesolithic dates, which significantly predate the construction of Stonehenge as currently understood, were largely overlooked in the public dissemination of the research findings.

This oversight raises essential questions about the narrative surrounding Stonehenge’s origins and the methodologies used in archaeological dating. The presence of Mesolithic hearths at Craig Rhos-y-Felin suggests that the site was of importance to human communities thousands of years before the Neolithic period. This evidence challenges the conventional timeline of Stonehenge’s construction and suggests a longer, more complex history of human interaction with the landscape and the bluestones.

Furthermore, the report inadvertently highlights the ongoing debate within archaeology about how best to interpret and present findings to the public. The focus on headline-grabbing narratives, such as the relocation of Stonehenge from Wales, can sometimes overshadow equally significant but less sensational discoveries, such as the evidence of Mesolithic activity at the quarry site.

An Inconvenient TRUTH (Craig Rhos Y Felin) — Mesolithic Post Holes at the Old Car Park at Stonehenge – The Bluestone Enigma

The excavation in 1966 and subsequent discoveries surrounding Stonehenge offer a fascinating and somewhat contentious glimpse into the complex task of accurately dating ancient sites. The initial observations by Lance and Faith Vatcher highlighted the Neolithic character of three holes excavated near Stonehenge, with no datable pottery found. Yet, the characteristics of the holes suggested a Neolithic origin. This assumption was later questioned when a PhD student discovered that the charcoal deposits from these holes, surprisingly composed mostly of pine, could not be Neolithic as initially thought. Pine was believed to be ‘extinct’ in the area by the time of Stonehenge’s supposed construction, according to pollen analysis.

This revelation was startling, especially to the officials of the Historic Buildings and Monuments Commission, later known as English Heritage. The carbon dating of these pine samples placed them squarely in the Mesolithic era, specifically between 8860 to 6590 BCE, challenging the previously accepted timeline for Stonehenge’s construction. Furthermore, the report mentions pine samples from Woodhenge, which, if also Mesolithic, would radically alter our understanding of that site’s age.

Stonehenge Car Park

post holes car park — Mesolithic Post Holes in Old Car Park – The Bluehenge Enigma

Instead of seizing this opportunity to delve deeper into these findings, a narrative was constructed that dismissed these posts as totem poles from wandering hunter-gatherers, unrelated to Stonehenge. This decision to sideline potentially groundbreaking evidence highlights a reluctance within some parts of the archaeological community to reconsider established narratives, even in the face of new evidence.

The discovery in 1988-89 by Wessex Archaeology of another Mesolithic post hole, along with a piece of rhyolite dated to 7737 – 7454 BCE, further complicates the timeline for Stonehenge and the surrounding area. This finding should have prompted a reevaluation of the site’s dating. However, attempts to fit this new evidence into the existing narrative of Stonehenge’s construction timeline illustrate the challenges and controversies inherent in archaeological interpretation.

These instances underscore the necessity for openness, curiosity, and a willingness to revise our understanding of history in light of new evidence. They remind us that the story of human history is complex and continually evolving, and our interpretations must adapt as we uncover more about our past.

Discoveries at Stonehenge, including charcoal (OxA-18655) found in the Hole socket of Stone 10, dating to 7330 – 7060 BCE, match the dates of the Mesolithic post holes, with significant implications for our understanding of the site’s history. This evidence, dating to the Mesolithic post holes, suggests that the activities at Stonehenge and its surroundings span much earlier than previously believed. However, the apparent suppression of this news from widespread media coverage raises questions about the narrative presented to the public and in educational materials.

The excavation at Blick Mead, less than a mile from Stonehenge, by the Open University, which uncovered evidence of Mesolithic-period habitation and feasting, further challenges the entrenched views held by some about prehistoric life around Stonehenge. These findings suggest a continuous and significant presence of people in this area during the Mesolithic period, contradicting the simplistic ‘totem pole’ myth still perpetuated in some narratives by English Heritage (EH) through their exhibitions and guidebooks.

Moreover, the recent transformation of the Stonehenge site, including the closure of the B-road past the stones and the relocation of the visitors’ car park to a new, multi-million-pound visitor centre, represents a significant shift in how the site is accessed and experienced by the public. The removal of the old tarmac and the reversion of the land to grass aim to restore a more authentic prehistoric ambience to Stonehenge. This effort to make the site appear more as it did at the time of its construction is commendable, but also highlights the ongoing tension between modern interpretations of the site and the emerging evidence of its ancient past.

These developments at Stonehenge and Blick Mead exemplify the dynamic nature of archaeological research and the complexities involved in interpreting and presenting the past. As new evidence continues to emerge, the narrative of prehistoric Britain needs to evolve accordingly, ensuring a more accurate and nuanced understanding of these ancient landscapes and their significance to human history.

You would indeed think that removing the tarmac from the old visitor car park at Stonehenge, especially given the significant previous findings beneath it, would prompt a comprehensive excavation to unearth more evidence of the site’s Mesolithic history. Such an excavation could potentially transform our understanding of Stonehenge and its origins, providing invaluable insights into its early history and the people who frequented the site during the Mesolithic period.

Tim Daw’s role as a warden at Stonehenge, combined with his proactive approach to documenting changes and features of the site through photography, exemplifies the kind of engaged observation that can lead to important discoveries. His finding of patch marks by the central upright stones, indicating the possible positions of missing stones from the Inner Circle, is a testament to the contributions individuals can make to the ongoing investigation of Stonehenge. Daw’s work underscores the value of continuous and attentive observation of archaeological sites, even by those not formally conducting research.

The discovery of such features and the potential for further findings beneath the former car park area highlights the need for a thorough and systematic archaeological examination whenever opportunities arise. These efforts not only enrich our knowledge of Stonehenge’s past but also contribute to the broader understanding of prehistoric human activity in the region. As we continue to peel back the layers of Stonehenge’s history, each finding adds a piece to the puzzle of this enigmatic monument’s story, emphasising the importance of preserving and exploring our archaeological heritage.

Tim Daw’s experiences and observations as a warden at Stonehenge, particularly his discovery of additional post holes beneath the old visitor’s car park, highlight the ongoing potential for new findings that can challenge and enrich our understanding of Stonehenge’s history. Despite being warned against publishing his conclusions due to unauthorised blog activity, Daw chose to resign and continue his work, revealing, through ‘unofficial’ pictures, the existence of even more post holes under the car park, aligned with those discovered in 1966.

Bluestone Quarries

These findings, including the newly discovered post hole that aligns with the four others from 1966, support the hypothesis that these structures are situated on what was once the shoreline of the River Avon around 8000 BCE. This suggests that during the Mesolithic period, the stones quarried in Wales could have been transported by boat directly to Stonehenge, navigating along enlarged rivers rather than taking the longer sea route proposed by some archaeologists.

Further complicating the narrative are my analyses of the bluestone structures from other Preseli sites like Carn Goedog and Craig Talfynyydd, which are connected by streams and rivers to the River Nevern. Unfortunately, archaeologists have interpreted this network of waterways primarily through a religious lens rather than considering its practical functionality as a transportation network.

The persistence of the ‘ox-cart’ route theory, which posits a land route along the modern A40, overlooks the logistical challenges posed by the period’s dense woods, swamps, and forests. Such conditions would have made the construction and use of a road system highly impractical, if not impossible.

My critique extends to the inconsistencies and logical inaccuracies in the archaeological narrative, particularly regarding the site layout and geological evidence at Craig Rhos-y-Felin. The assumption that floodwaters in the area were solely the result of ice melt, quickly draining into the sea post-Ice Age, ignores the broader implications of such flooding for the landscape and its inhabitants.

We confirm in the report that an old river ran around this quarry as long ago as 5620 – 5460 BCE and possibly as late as 1030 – 910 BCE.

“Most of the site was then covered by a layer of yellow colluvium (035), dated by oak charcoal to 1030–910 cal BC (combine SUERC-46199; 2799±30 BP and SUERC-46203; 2841±28 BP). This deposit is contemporary with the uppermost fill of a palaeochannel of the Brynberian stream that flowed past the northern tip of the outcrop. Charcoal of Corylus and Tilia from the basal fill of this palaeochannel dates to 5800–5640 cal BC (OxA- 32021; 6833±40 BP) and 5620–5460 cal BC (OxA-32022; 6543±37 BP), both at 95.4% probability.”

The report’s insights suggest that during the Mesolithic Period, an enlarged stream that fed into the River Nevern reached the quarry outcrop rocks. Notably, it was positioned just a few meters away, even as late as 1000 BCE. This geographical configuration suggests that boats were likely the primary means of transporting the large, newly quarried stones to their final destination at Stonehenge, mirroring stone transport methods in other ancient civilisations, such as Egypt.

The site layout at the quarry provides crucial clues about the timing of the stone quarrying. Notably, a single monolith is positioned near the river on the site’s east side, ready for transportation. Nearby, to the south of this monolith, are human-made hearths, precisely where one would expect them to be. However, the challenge arises in dating these hearths as Mesolithic, with three distinct periods identified: 8550 – 8330 BCE; 8220 – 7790 BCE; and 7490 – 7190 BCE. Despite this, the report asserts that there is no evidence of Mesolithic quarrying or working of rhyolite at this site.

This claim overlooks the practical use of tools across different periods. If Mesolithic and Neolithic communities utilised similar tools, distinguishing tool marks from these different periods might be more challenging than the report suggests. Moreover, the presence of these communities at the quarry for over a millennium raises questions about their activities if not quarrying the stones.

The connection between the quarry site and Stonehenge is strengthened by over twenty Carbon-14 dates that align with my hypothesis, in contrast to the mere two samples currently highlighted by experts, which are dated 300 – 500 years older than existing estimates. By analysing these overlapping dates against the latest carbon-dating curve (IntCal20), we can refine the construction date of Stonehenge’s Phase I (the placement of bluestones in the Aubrey holes). By calculating the mean of these probable dates, we aim to obtain a more accurate estimate of when this monumental task was undertaken, potentially rewriting the timeline of one of the world’s most enigmatic prehistoric monuments.

Carbon Dating

Stonehenge	Old Car Park (Ref. and Date)	Craig Rhos-Y-Felin Ref	Craig Rhos-Y-Felin Dates	Carn Goedog Ref & Dates
Post Hole A	HAR-455 (8825 – 7742)	SUERC-50761 OxA-30507 OxA- 30548¹ SUERC-51164 SUERC-50760 OxA-30549 SUERC-51165 OxA-30506 OxA-30548² OxA-30506² OxA-30547 OxA-30504	8550 – 8330 8471 – 8285 8286 – 8163 8289 – 8169 8211 – 7955 8238 – 7941 8216 – 7785 8021 – 7792 8122 – 7962 8207 – 8030 8012 – 7711 8281 – 8166
Post Hole B	HAR–456 (7377 – 6651)	OxA-30503²	7232 – 7188	OxA31823 – 7190 to 6840
WA 9580	GU-5109 (8259 – 7742)	OxA- 30548 SUERC-51164 SUERC-50760 OxA-30549 SUERC-51165 OxA-30506 OxA-30548² OxA-30506² OxA-30547 OxA-30504	8286 – 8163 8289 – 8169 8211 – 7955 8238 – 7941 8216 – 7785 8021 – 7792 8122 – 7962 8207 – 8030 8012 – 7711 8281 – 8166
WA 9580	QxA-4219 (7737 – 7454)	Beta-392850 OxA-30547	7944 – 7648 8012 – 7711	OxA-35184 – 7590 to 7380
WA 9580	QxA-4220 (7595 – 7178)	SUERC-51163 OxA-30523 OxA-305031¹	7539 – 7308 7472 – 7182 7485 – 7248

Carbon Dates comparison – note that the sites are linked to different mooring posts, indicating activity dates

Table 1– Matching Carbon Dates

The calculations indicate that work at the quarry began around 8300 BCE, with its main phase of activity around 8000 BCE, and continued for at least a millennium, challenging the conventional narrative about Stonehenge and its Bluestones. This timeline suggests a far more ancient and enduring connection between the quarry site and Stonehenge than previously acknowledged.

Carn Goedog

Initially, Carn Menyn in the Preseli Hills was believed to be the source of Stonehenge’s spotted dolerite, but later analysis pinpointed Carn Goedog as a closer chemical match. Recent geochemical studies have divided the Stonehenge spotted dolerite into two main groups, with one group closely matching the Carn Goedog outcrop. The origin of the second group remains uncertain, potentially deriving from Carn Goedog or nearby outcrops.

Further geological investigations at Stonehenge have identified additional sources for its bluestones. Unspotted dolerite matches with outcrops at Cerrigmarchogion and Craig Talfynydd on the Preseli ridge. Another bluestone variety, “rhyolite with fabric,” traces back to Craig Rhos-y-Felin, while a source of Lower Palaeozoic sandstone has been identified north of the Preseli hills. The origin of volcanic tuffs found at Stonehenge also likely lies in the Preseli area.

Bluestone map 3 — Preseli Mountains and Quarry Sites are ALL by rivers – The Bluestone Enigma

Surface indications of post-medieval Quarrying, particularly on its south side, have evidenced Carn Goedog’s accessibility. This historical quarrying, distinguishable by cylindrical drill holes on some quarried blocks at the outcrop’s base, was performed using the ‘plug-and-feather’ technique with metal wedges. The discovery of a worn trade token beneath one of these blocks helps date this activity to around 1800.

In 2014, test trenching along the southern edge of Carn Goedog revealed layers of human activity spanning various periods, from the recent centuries in trench 3 to deeper prehistorical layers in trench 2. Trench 1, strategically positioned at the outcrop’s base and just beyond the eastern limit of the early modern quarry debris, was particularly significant. It was seen as offering a unique opportunity to uncover evidence of prehistoric quarrying that hadn’t been disturbed by later activities.

This layered historical context at Carn Goedog is crucial for understanding the complex human interactions with the site over millennia. The evidence for prehistoric quarrying, undisturbed by later post-medieval activity, provides invaluable insights into the methods and technologies used by ancient peoples to extract and transport the stones that contributed to the construction of monumental structures like Stonehenge.

Trench 1 was enlarged in 2015 and 2016 to reveal features that may relate to prehistoric quarrying activity. At the southern foot of the outcrop, excavation revealed an artificial platform of flat slabs—many of them split—laid (with the split faces upwards) in a tongue-shaped formation 10m north–south by at least 8m east–west (Figure 6).

Those slabs lying against the face of the outcrop had been pressed into the underlying sediments, presumably by the weight of pillars lowered onto the platform. The platform terminates from the outcrop with a vertical drop of 0.9m to the ground surface beyond. This platform is stratigraphically earlier than a series of deposits that included early modern quarrying debris and hearths of the Roman and medieval periods. One hearth (Figure 6: 105) set within a gap in the platform where a slab had been removed produced charcoal dating to 7190–6840 cal BC (8091±38 BP) and 2890–2630 cal BC (4164±30 BP) (Table 1).

The findings across the quarry sites, including Carn Goedog and Craig Rhos-y-Felin, point to a nuanced understanding of how the bluestones were utilised and replenished at Stonehenge. The hearths discovered at these sites, particularly those dating to the Mesolithic and Neolithic periods, suggest ongoing human activity and potentially organised efforts to quarry and transport bluestones over extended periods. This insight challenges the conventional explanation that the transportation of Bluestones to Stonehenge was a singular event.

The Stonehenge Layer

The evidence of modern quarrying at both the northern and southern ends of these sites and the dates from central hearths align with observations made at Craig Rhos-y-felin. Our research, as outlined in published books, supports the theory that ancestors chipped bluestones at Stonehenge for healing, utilising the water in the ditch to bathe their sickness away, as evidenced by the ‘Stonehenge Layer’ discovered by Dervill and Wainwright in 2008. This practice would naturally lead to the depletion of bluestones over time, necessitating periodic replenishment from the quarries.

The conventional narrative, which posits that the bluestones were transported to Stonehenge in a one-off event, needs to account for the scientific data emerging from these quarry sites and the Stonehenge site. The evidence suggests a more complex interaction with these stones, involving repeated quarrying and transportation activities that likely spanned centuries. This ongoing relationship with the bluestones reflects a deeper functional connection to them, underscoring the importance of revisiting and revising our understanding of Stonehenge’s construction and the role of the bluestones within this prehistoric monument.

English Heritage’s significant investment in the Stonehenge Visitors Centre, including the creation of exhibitions that present established theories about the monument’s origins and functions, raises questions about the implications of discoveries that contradict these narratives. If foundational assumptions about Stonehenge are proven incorrect, it could have financial repercussions, particularly if the narrative presented to the public through expensive exhibitions becomes outdated or inaccurate. This situation underscores the complex relationship between archaeological research, public interpretation, and financial investments in heritage sites.

PodCast

Author’s Biography

Robert John Langdon, a polymathic luminary, emerges as a writer, historian, and eminent specialist in LiDAR Landscape Archaeology.

His intellectual voyage has been interwoven with stints as an astute scrutineer in government and grand corporate bastions, a tapestry spanning British Telecommunications, Cable and Wireless, British Gas, and the esteemed University of London.

A decade hence, Robert’s transition into retirement unfurled a chapter of insatiable curiosity. This phase saw him immerse himself in Politics, Archaeology, Philosophy, and the enigmatic realm of Quantum Mechanics. His academic odyssey traversed the venerable corridors of knowledge hubs such as the Museum of London, University College London, Birkbeck College, The City Literature Institute, and Chichester University.

In the symphony of his life, Robert is a custodian of three progeny and a pair of cherished grandchildren. His sanctuary lies ensconced in the embrace of West Wales, where he inhabits an isolated cottage, its windows framing a vista of the boundless sea – a retreat from the scrutinising gaze of Her Majesty’s Revenue and Customs, an amiable clandestinity in the lap of nature.

Exploring Prehistoric Britain: A Journey Through Time

My blog delves into the fascinating mysteries of prehistoric Britain, challenging conventional narratives and offering fresh perspectives grounded in cutting-edge research, particularly LiDAR technology. I invite you to explore some key areas of my research. For example, the Wansdyke, often cited as a defensive structure, is re-examined in light of new evidence. I’ve presented my findings in my blog post Wansdyke: A British Frontier Wall – ‘Debunked’, and a Wansdyke LiDAR Flyover video further visualises my conclusions.

My work also often challenges established archaeological dogma. I argue that many sites, such as Hambledon Hill, commonly identified as Iron Age hillforts, are not what they seem. My posts Lidar Investigation Hambledon Hill – NOT an ‘Iron Age Fort’ and Unmasking the “Iron Age Hillfort” Myth explore these ideas in detail and offer an alternative view. Similarly, sites like Cissbury Ring and White Sheet Camp receive re-evaluations based on LiDAR analysis in my posts “Lidar Investigation Cissbury Ring through time” and “Lidar Investigation White Sheet Camp,“ revealing fascinating insights into their true purpose. I have also examined South Cadbury Castle, often linked to the mythical Camelot56.

My research also extends to ancient water management, including the role of canals and other linear earthworks. I have discussed the true origins of Car Dyke in multiple posts, including Car Dyke – ABC News Podcast and Lidar Investigation Car Dyke – North Section, which suggest a Mesolithic origin 2357. I also explore the misidentification of Roman aqueducts, as seen in my posts on the Great Chesters (Roman) Aqueduct. My research has also been greatly informed by my post-glacial flooding hypothesis, which has helped explain landscape transformations over time. I have discussed this hypothesis in several posts, including AI now supports my Post-Glacial Flooding Hypothesis and Exploring Britain’s Flooded Past: A Personal Journey

Finally, my blog also investigates prehistoric burial practices, as seen in Prehistoric Burial Practices of Britain and explores the mystery of Pillow Mounds, often mistaken for medieval rabbit warrens, but with a potential link to Bronze Age cremation in my posts: Pillow Mounds: A Bronze Age Legacy of Cremation? and The Mystery of Pillow Mounds: Are They Really Medieval Rabbit Warrens?. My research also includes astronomical insights into ancient sites, for example, in Rediscovering the Winter Solstice: The Original Winter Festival. I also review new information about the construction of Stonehenge in The Stonehenge Enigma.