Stone 58 Sediments Date to 1.6 Billion years

 

A 3-inch-long sample of the core from Stone 58 was used for detailed analyses. (Image credit: British Geological Survey)

A long-lost piece of Stonehenge that was taken by a man performing restoration work on the monument has been returned after 60 years, giving scientists a chance to peer inside a pillar of the iconic monument for the first time.

In 1958, Robert Phillips, a representative of the drilling company helping to restore Stonehenge, took the cylindrical core after it was drilled from one of Stonehenge's pillars — Stone 58. Later, when he emigrated to the United States, Phillips took the core with him. Because of Stonehenge's protected status, it's no longer possible to extract samples from the stones. But with the core's return in 2018, researchers had the opportunity to perform unprecedented geochemical analyses of a Stonehenge pillar, which they described in a new study.

They found that Stonehenge's towering standing stones, or sarsens, were made of rock containing sediments that formed when dinosaurs walked the Earth. Other grains in the rock date as far back as 1.6 billion years.

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