Great Scott! Stonehenge's Altar Stone origins reveal advanced ancient Britain

New research led by Curtin University has revealed Stonehenge's monumental six-tonne Altar Stone, long believed to originate from Wales, actually hails from Scotland.

Furthermore, the findings point to the existence of unexpectedly advanced transport methods and societal organisation at the time of the stone's arrival at its current location in southern England about 5000 years ago.

Curtin researchers studied the age and chemistry of mineral grains within fragments of the Altar Stone, which is a 50cm thick sandstone block measuring 5 x 1 metres, that sits at the centre of Stonehenge's iconic stone circle in Wiltshire.

Lead author PhD student Anthony Clarke from the Timescales of Mineral Systems Group within Curtin's School of Earth and Planetary Sciences said analysis of the age and chemical composition of minerals within fragments of the Altar Stone matched it with rocks from northeast Scotland, while also clearly differentiating them from Welsh bedrock.

"Our analysis found specific mineral grains in the Altar Stone are mostly between 1000 to 2000 million years old, while other minerals are around 450 million years old," Mr Clarke said.

"This provides a distinct chemical fingerprint suggesting the stone came from rocks in the Orcadian Basin, Scotland, at least 750 kilometres away from Stonehenge.

"Given its Scottish origins, the findings raise fascinating questions, considering the technological constraints of the Neolithic era, as to how such a massive stone was transported over vast distances around 2600 BC.

"This discovery also holds personal significance for me. I grew up in the Mynydd Preseli, Wales, where some of Stonehenge's stones came from. I first visited Stonehenge when I was one year old and now at 25, I returned from Australia to help make this scientific discovery -- you could say I've come full circle at the stone circle."

Study co-author Professor Chris Kirkland, also from the Timescales of Mineral Systems Group at Curtin, said the findings had significant implications for understanding ancient communities, their connections, and their transportation methods.

"Our discovery of the Altar Stone's origins highlights a significant level of societal coordination during the Neolithic period and helps paint a fascinating picture of prehistoric Britain," Professor Kirkland said.

"Transporting such massive cargo overland from Scotland to southern England would have been extremely challenging, indicating a likely marine shipping route along the coast of Britain.

"This implies long-distance trade networks and a higher level of societal organisation than is widely understood to have existed during the Neolithic period in Britain."

Funded by an Australian Research Council Discovery Project, the research was performed in collaboration with Aberystwyth University, The University of Adelaide and University College London.

Co-author Professor Richard Bevins from Aberystwyth University said the findings overturned what had been thought for the past century.

"We have succeeded in working out, if you like, the age and chemical fingerprints of perhaps one of the most famous of stones in the world-renowned ancient monument," Professor Bevins said.

"While we can now say that this iconic rock is Scottish and not Welsh, the hunt will still very much be on to pin down where exactly in the north-east of Scotland the Altar Stone came from."

Co-author Dr Robert Ixer of the UCL Institute of Archaeology said the findings were genuinely shocking, but if plate tectonics and atomic physics were correct, then the Altar Stone is Scottish.

"The work prompts two important questions: why and exactly how was the Altar Stone transported from the very north of Scotland, a distance of more than 700 kilometres, to Stonehenge?"

Curtin Vice-Chancellor Professor Harlene Hayne said much of the research and analysis done by Mr Clarke and Professor Kirkland was undertaken at the University's John de Laeter Centre.

"This fascinating study is another example of the stellar work being undertaken by Curtin University's Timescales of Mineral Systems Group with the John de Laeter Centre, using state-of-the-art equipment in our GeoHistory Facility that supports important minerals research," Professor Hayne said.

"It offers specialist mass spectrometers which are used to examine the composition of materials such as rock-forming minerals, archaeological artefacts, meteorites, ceramics and even biological substances such as teeth, bones and shell.

"Ongoing investment is required to maintain cutting-edge facilities like this, which are crucial for attracting the world's best minds. In this case, we are delighted that our outstanding research reputation and facilities led PhD student Anthony Clarke to travel 15,000 kilometres from his home in Wales to study at Curtin and make this significant finding."

Mr Clarke said he chose Curtin for his PhD because it also offered the chance to work alongside renowned researchers, such as Professor Kirkland.

"Curtin has given us the freedom and independence to explore fascinating work, such as Stonehenge and access to the world's most advanced equipment and expert staff means I can complete all my work there," Mr Clarke said.

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Prehistoric feces reveal parasites from feasting at Stonehenge

A new analysis of ancient faeces found at the site of a prehistoric village near Stonehenge has uncovered evidence of the eggs of parasitic worms, suggesting the inhabitants feasted on the internal organs of cattle and fed leftovers to their dogs.

Durrington Walls was a Neolithic settlement situated just 2.8km from Stonehenge, and dating from around 2500 BC, when much of the famous stone monument was constructed. It is believed that the site housed the people who built Stonehenge.

A team of archaeologists led by the University of Cambridge investigated nineteen pieces of ancient faeces, or 'coprolite', found at Durrington Walls and preserved for over 4,500 years. Five of the coprolites (26%) -- one human and four dog -- were found to contain the eggs of parasitic worms.

Researchers say it is the earliest evidence for intestinal parasites in the UK where the host species that produced the faeces has also been identified. The findings are published today in the journal Parasitology.

"This is the first time intestinal parasites have been recovered from Neolithic Britain, and to find them in the environment of Stonehenge is really something," said study lead author Dr Piers Mitchell from Cambridge's Department of Archaeology.

"The type of parasites we find are compatible with previous evidence for winter feasting on animals during the building of Stonehenge," he said.

Four of the coprolites, including the human one, contained the eggs of capillariid worms, identified in part by their lemon shape.

While the many types of capillariid around the world infect a wide range of animals, on the rare occasion that a European species infects humans the eggs get lodged in the liver and don't appear in stool.

The evidence of capillariid eggs in human faeces indicates that the person had eaten the raw or undercooked lungs or liver from an already infected animal, resulting in the parasite's eggs passing straight through the body.

During excavations of the main 'midden' -- or dung and refuse heap -- at Durrington Walls, archaeologists uncovered pottery and stone tools along with over 38,000 animal bones. Some 90% of the bones were from pigs, with less than 10% from cows. This is also where the partially mineralised faeces used in the study were found.

"As capillariid worms can infect cattle and other ruminants, it seems that cows may have been the most likely source of the parasite eggs," said Mitchell.

Previous isotopic analyses of cow teeth from Durrington Walls suggest that some cattle were herded almost 100km from Devon or Wales to the site for large-scale feasting. Patterns of butchery previously identified on cattle bones from the site suggest beef was primarily chopped for stewing, and bone marrow was extracted.

"Finding the eggs of capillariid worms in both human and dog coprolites indicates that the people had been eating the internal organs of infected animals, and also fed the leftovers to their dogs," said co-author Evilena Anastasiou, who assisted with the research while at Cambridge.

To determine whether the coprolites excavated from the midden were from human or animal faeces, they were analysed for sterols and bile acids at the National Environment Isotope Facility at the University of Bristol.

One of the coprolites belonging to a dog contained the eggs of fish tapeworm, indicating it had previously eaten raw freshwater fish to become infected. However, no other evidence of fish consumption, such as bones, has been found at the site.

"Durrington Walls was occupied on a largely seasonal basis, mainly in winter periods. The dog probably arrived already infected with the parasite," said Dr Piers Mitchell.

"Isotopic studies of cow bones at the site suggests they came from regions across southern Britain, which was likely also true of the people who lived and worked there."

The dates for Durrington Walls match those for stage two of the construction of Stonehenge, when the world-famous 'trilithons' -- two massive vertical stones supporting a third horizontal stone -- were erected, most likely by the seasonal residents of this nearby settlement.

While Durrington Walls was a place of feasting and habitation, as evidenced by the pottery and vast number of animal bones, Stonehenge itself was not, with little found to suggest people lived or ate there en masse.

Prof Mike Parker Pearson from UCL's Institute of Archaeology, who excavated Durrington Walls between 2005 and 2007, added: "This new evidence tells us something new about the people who came here for winter feasts during the construction of Stonehenge."

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Massive prehistoric circle near Stonehenge

What could be one of the largest prehistoric sites in the UK has been discovered near Stonehenge by a consortium of archaeologists led by the University of Bradford.

A massive 2km-wide ring of prehistoric 'shafts' up to 10m across and 5m deep has been discovered around the 'super henge' at Durrington Walls and the famous site at Woodhenge. The structures have been carbon dated to about 2500BC.

Archaeologists believe the circle of shaft marks a boundary around the massive henge at Durrington. It is thought the features, along with an internal post line, could have guided people towards the religious sites and warned others not to cross the boundary.

Prof Vince Gaffney, 50th Anniversary Chair of the School of Archaeological and Forensic Sciences in the Faculty of Life Sciences, said it was extraordinary such a major find had been made so close to Stonehenge.

"The area around Stonehenge is amongst the most studied archaeological landscapes on earth and it is remarkable that the application of new technology can still lead to the discovery of such a massive prehistoric structure which, currently, is significantly larger than any comparative prehistoric monument that we know of in Britain, at least."

"When these pits were first noted it was thought they might be natural features -- solution hollows in the chalk. Only when the larger picture emerged, through the geophysical surveys undertaken as part of the Stonehenge Hidden Landscape Project, could we join the dots and see there was a pattern on a massive scale."

Research on the pits at Durrington was undertaken by a consortium of archaeologists led by the University of Bradford as part of the Stonehenge Hidden Landscape Project (https://lbi-archpro.org/cs/stonehenge/), and with the Ludwig Boltzmann Institute for Archaeological Prospection and Virtual Archaeology, the Universities of Birmingham, St Andrews, Warwick, the University of Wales Trinity Saint Davids, and the Scottish Universities Environmental Research Centre (University of Glasgow).

Researchers have identified up to 20 shafts but estimate there may have been more than 30 originally.

"The size of the shafts and circuit surrounding Durrington Walls is without precedent within the UK. It demonstrates the significance of Durrington Walls Henge, the complexity of the monumental structures within the Stonehenge landscape, and the capacity and desire of Neolithic communities to record their cosmological belief systems in ways, and at a scale, that we had never previously anticipated."

Dr Nick Snashall, National Trust archaeologist for the Stonehenge and Avebury World Heritage Site, said: "As the place where the builders of Stonehenge lived and feasted Durrington Walls is key to unlocking the story of the wider Stonehenge landscape, and this astonishing discovery offers us new insights into the lives and beliefs of our Neolithic ancestors.

"The Hidden Landscapes team have combined cutting-edge, archaeological fieldwork with good old-fashioned detective work to reveal this extraordinary discovery and write a whole new chapter in the story of the Stonehenge landscape."

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Prehistoric Britons rack up food miles for feasts near Stonehenge

Stonehenge.

Archaeologists have unearthed evidence of the earliest large-scale celebrations in Britain -- with people and animals travelling hundreds of miles for prehistoric feasting rituals.

The study, led by Dr Richard Madgwick of Cardiff University, is the most comprehensive to date and examined the bones of 131 pigs, the prime feasting animals, from four Late Neolithic (c. 2800-2400BC) complexes. Serving the world-famous monuments of Stonehenge and Avebury, the four sites -- Durrington Walls, Marden, Mount Pleasant and West Kennet Palisade Enclosures -- hosted the very first pan-British events, feasts that drew people and animals from across Britain.

The results show pig bones excavated from these sites were from animals raised as far away as Scotland, North East England and West Wales, as well as numerous other locations across the British Isles. The researchers believe it may have been important for those attending to contribute animals raised locally at their homes.

Before now, the origins of people that took part in rituals at these megalithic monuments and the extent of the population's movements at the time have been long-standing enigmas in British prehistory.

Dr Richard Madgwick, of the School of History, Archaeology and Religion, said: "This study demonstrates a scale of movement and level of social complexity not previously appreciated."

"These gatherings could be seen as the first united cultural events of our island, with people from all corners of Britain descending on the areas around Stonehenge to feast on food that had been specially reared and transported from their homes."

Representing great feats of engineering and labour mobilisation, the Neolithic henge complexes of southern Britain were the focal point for great gatherings in the third millennium BC. Pigs were the prime animal used in feasting and they provide the best indication of where the people who feasted at these sites came from as almost no human remains have been recovered.

Using isotope analysis, which identifies chemical signals from the food and water that animals have consumed, the researchers were able to determine geographical areas where the pigs were raised. The study offers the most detailed picture yet of the degree of mobility across Britain at the time of Stonehenge.

Dr Madgwick said: "Arguably the most startling finding is the efforts that participants invested in contributing pigs that they themselves had raised. Procuring them in the vicinity of the feasting sites would have been relatively easy.

"Pigs are not nearly as well-suited to movement over distance as cattle and transporting them, either slaughtered or on the hoof, over hundreds or even tens of kilometres, would have required a monumental effort.

"This suggests that prescribed contributions were required and that rules dictated that offered pigs must be raised by the feasting participants, accompanying them on their journey, rather than being acquired locally."

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Quarrying of Stonehenge 'bluestones' dated to 3000 BC

This is the Stonehenge quarry.

Excavations at two quarries in Wales, known to be the source of the Stonehenge 'bluestones', provide new evidence of megalith quarrying 5,000 years ago, according to a new UCL-led study.

Geologists have long known that 42 of Stonehenge's smaller stones, known as 'bluestones', came from the Preseli hills in Pembrokeshire, west Wales. Now a new study published in Antiquity pinpoints the exact locations of two of these quarries and reveals when and how the stones were quarried.

The discovery has been made by a team of archaeologists and geologists from UCL, Bournemouth University, University of Southampton, University of the Highlands and Islands and National Museum of Wales, which have been investigating the sites for eight years.

Professor Mike Parker Pearson (UCL Archaeology) and leader of the team, said: "What's really exciting about these discoveries is that they take us a step closer to unlocking Stonehenge's greatest mystery -- why its stones came from so far away."

"Every other Neolithic monument in Europe was built of megaliths brought from no more than 10 miles away.

We're now looking to find out just what was so special about the Preseli hills 5,000 years ago, and whether there were any important stone circles here, built before the bluestones were moved to Stonehenge."

The largest quarry was found almost 180 miles away from Stonehenge on the outcrop of Carn Goedog, on the north slope of the Preseli hills.

"This was the dominant source of Stonehenge's spotted dolerite, so-called because it has white spots in the igneous blue rock. At least five of Stonehenge's bluestones, and probably more, came from Carn Goedog," said geologist Dr Richard Bevins (National Museum of Wales).

In the valley below Carn Goedog, another outcrop at Craig Rhos-y-felin was identified by Dr Bevins and fellow geologist Dr Rob Ixer (UCL Archaeology) as the source of one of the types of rhyolite -- another type of igneous rock -- found at Stonehenge.

According to the new study, the bluestone outcrops are formed of natural, vertical pillars. These could be eased off the rock face by opening up the vertical joints between each pillar. Unlike stone quarries in ancient Egypt, where obelisks were carved out of the solid rock, the Welsh quarries were easier to exploit.

Neolithic quarry workers needed only to insert wedges into the ready-made joints between pillars, then lower each pillar to the foot of the outcrop.

Although most of their equipment is likely to have consisted of perishable ropes and wooden wedges, mallets and levers, they left behind other tools such as hammer stones and stone wedges.

"The stone wedges are made of imported mudstone, much softer than the hard dolerite pillars. An engineering colleague has suggested that hammering in a hard wedge could have created stress fractures, causing the thin pillars to crack. Using a soft wedge means that, if anything were to break, it would be the wedge and not the pillar," said Professor Parker Pearson.

Archaeological excavations at the foot of both outcrops uncovered the remains of human-made stone and earth platforms, with each platform's outer edge terminating in a vertical drop of about a metre.

"Bluestone pillars could be eased down onto this platform, which acted as a loading bay for lowering them onto wooden sledges before dragging them away," said Professor Colin Richards (University of the Highlands and Islands), who has excavated Britain's only other identified megalith quarry in the Orkney islands, off the north coast of Scotland.

An important aim of Professor Parker Pearson's team was to date megalith-quarrying at the two outcrops. In the soft sediment of a hollowed-out track leading from the loading bay at Craig Rhos-y-felin, and on the artificial platform at Carn Goedog, the team recovered pieces of charcoal dating to around 3000 BC.

The team now thinks that Stonehenge was initially a circle of rough, unworked bluestone pillars set in pits known as the Aubrey Holes, near Stonehenge, and that the sarsens (sandstone blocks) were added some 500 years later.

The new discoveries also cast doubt on a popular theory that the bluestones were transported by sea to Stonehenge.

"Some people think that the bluestones were taken southwards to Milford Haven and placed on rafts or slung between boats and then paddled up the Bristol Channel and along the Bristol Avon towards Salisbury Plain. But these quarries are on the north side of the Preseli hills so the megaliths could have simply gone overland all the way to Salisbury Plain," said Professor Kate Welham (Bournemouth University).

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