Mystery mound in England turns out to be ancient monument


England’s prehistoric landscape has a new addition.

Marlborough Mound in Wiltshire has long been a mystery. The flat-topped cone of earth looks like a smaller version of Silbury Hill, pictured here. The bigger mound was finished around 2300 BC at a time when Neolithic farmers were erecting stone circles such as Stonehenge and Avebury. Now archaeologists have taken samples from Marlborough Mound and carbon dated them to 2400 BC.

Carbon dating, which measures decaying carbon isotopes in organic matter, has a slight margin of error that increases the older the sample is. Thus Silbury Hill and Marlborough Mound may have been finished simultaneously, or at least in the same generation. The two mounds are only about 20 miles apart, a day’s walk for a Stone Age farmer or excited archaeologist.

The mound was reused several times. The Romans had a settlement next to it and the Normans built a castle on top of and around it in the late 11th or early 12th century. Early Norman castles were wooden palisades around an artificial mound. In this case their prehistoric predecessors saved them some work. The wooden walls were later replaced with stone ones but the castle has long since vanished. In the 17th century the mound was turned into a garden. The mound stands on the grounds of Marlborough College and is off-limits to visitors. Hopefully that will change now that its true importance is understood.

Archaeologists solve mystery of Silbury Hill (maybe)


It is one of England’s most mysterious monuments. Just a short walk from the massive stone circle complex of Avebury, Silbury Hill is a giant, flat-topped mound rising 120 feet above the surrounding countryside. Researchers have proposed dozens of theories over the years to explain its purpose, suggesting everything from a giant burial mound to a platform for religious music.

Now new research by English Heritage has revealed that Silbury Hill was constructed relatively quickly–in about hundred years–and finished around 2300 B.C. Previous researchers thought the mound took centuries to build. Archaeologists Jim Leary and David Field dug a cross-section tunnel into it in 2007 and found it was made up of 15 layers. The monument started as a circular ditch and embankment but soon grew into a giant hill. The researchers suggest that there was no final plan, no purpose. It was the building of it that mattered, the bringing together of various groups for the common purpose of a “continuous storytelling ritual”.

“Our Neolithic ancestors display an almost obsessive desire to constantly change the monument – to rearrange, tweak and adjust it. It’s as if the final form of the Hill did not matter – it was the construction process that was important,” Leary said.

“The most intriguing discovery is the repeated occurrence of antler picks, gravel, chalk and stones in different kinds of layering, in ways that suggest that these materials and their different combinations had symbolic meanings. We don’t know what myths they were representing but they must have meant something quite compelling and personal,” he said.

Leary and Field’s new book, The Story of Silbury Hill, explains their findings.

Of course archaeology isn’t a hard science, and this theory will be debated for years to come. Future excavations may refine or even overturn what Leary and Field have found. Silbury HIll hasn’t given up all its mysteries.

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