Mystery mound in England turns out to be ancient monument

by Sean McLachlan on


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 explore stone circle ten times larger than Stonehenge

by Sean McLachlan on

Move over Stonehenge, there’s a bigger stone circle in town.

Archaeologists are busy excavating Marden Henge, a giant stone circle and earthwork ten times larger than its more famous cousin. It’s not nearly as well-known, however, because all of its stones have been lost or buried. Traces of a giant earthwork and ditch that encircled the monument do survive, and archaeologists hope they’ll reveal secrets of England’s prehistoric past.

While everyone knows about Stonehenge, many people don’t realize there are nearly a thousand stone circles in the British Isles, from massive ones like Avebury (shown here) to smaller ones like the Rollright Stones. Marden Henge is in Wiltshire, close to Stonehenge and Avebury, and could provide clues to how and why they were constructed. The giant circle encloses about 15 hectares (37 acres) and has a mound at its center. Archaeologists plan to investigate both the central mound and the earthwork and ditch. The Neolithic farmers who built these monuments often put sacrifices in the surrounding ditches.

While there are no current plans for a visitor’s center at Marden Henge, there are plenty of other stone circles open to the public. Some of the more famous cater to visitors with interpretive signs and parking lots, while others simply stand in open fields, an enduring part of Europe’s ancient landscape. An excellent website to help you plan a visit is The Megalithic Portal, which includes information on stone circles and other megaliths such as barrows (tombs) and menhirs (individual standing stones) in the UK and all around the world.