New research from Curtin University offers the clearest scientific support yet that humans, rather than glaciers, carried the famous blue stones of Stonehenge to the ancient monument. The findings focus on one of archeology’s longest-running debates, adding weight to the idea that the stones were deliberately moved by human hands.
The study focuses on how the altar stone and other massive rocks ended up at Stonehenge, a question that has puzzled researchers for generations. By ruling out natural ice-driven transport, the research strengthens the case for purposeful human planning and effort.
Tracking Stonehenge through tiny minerals
To investigate the path of the stones, Curtin scientists used advanced mineral ‘fingerprinting’ methods to study microscopic grains found in rivers near Salisbury Plain in southern England. These tiny mineral fragments act as geological time capsules, preserving evidence of how sediments have moved across Britain over millions of years.
Using world-leading instruments at the John de Laeter Curtin Centre, the team examined more than 500 zircon crystals. Zircon is one of the hardest minerals on Earth, making it ideal for tracking ancient geological processes.
No signs of ancient glaciers
Lead author Dr. Anthony Clarke, from the Timescales of Minerals Systems Group at Curtin’s School of Earth and Planetary Sciences, said the analysis revealed no evidence that glaciers ever reached the Stonehenge area.
“If glaciers had carried stones all the way from Scotland or Wales to Stonehenge, they would have left a clear mineral signature on the Salisbury Plain,” said Dr. Clarke.
“Those rocks would erode over time and release tiny grains that we could date to understand their age and where they came from.
“We looked in the river sand near Stonehenge for any grains that could have been carried by the glaciers and found none. This makes the alternative explanation – that people moved the stones – much more plausible.”
How the stones were moved remains unclear
While the study strongly points to human transport, it is still unknown how exactly people moved the stones. Dr. Clarke said several possibilities had been suggested, but none could be confirmed.
“Some people say the stones could have been sailed from Scotland or Wales, or they could have been transported overland using round logs, but we may never really know,” said Dr. Clarke.
“But what we do know is that the ice almost certainly didn’t move the rocks.
Modern tools solve ancient questions
Study co-author Professor Chris Kirkland, also from Curtin’s Timescales of Mineral Systems Group, said the research highlights how modern geochemical techniques can help solve historical mysteries that have persisted for decades.
“Stonehenge never ceases to amaze us,” Professor Kirkland said.
“By analyzing minerals smaller than a grain of sand, we have been able to test theories that have persisted for more than a century.
“So many questions can be asked about this iconic monument – like why was Stonehenge built in the first place?
“It was probably used for a wide variety of different purposes, such as a calendar, an ancient temple, a place of feasting.
“So asking and then answering these kinds of questions requires different kinds of data sets, and this study adds an important part of that bigger picture.”
We build on earlier discoveries
The new findings follow another major discovery led by Curtin in 2024, which traced the origin of the central six-tonne ‘altar stone’ to Scotland. Together, the results reinforce the view that Neolithic builders deliberately sourced and transported Stonehenge stones over vast distances.
The study, titled “Detrital zircon-apatite fingerprints challenge glacial transport of Stonehenge megaliths,” was published in the journal Earth and environment communication.
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