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More on the lost 'Roman' road from Mike Pitts the Guardian:
The discovery of a road in Shropshire that was built by pre-Roman engineers suggests that indigenous Britons may have been much more accomplished than we – or the Romans – liked to imagine. The road itself tells the story well.
The route had long been known as a lost Roman road, named Margary No 64 after the man who first mapped what everyone assumed to be the country's earliest network. It was visible as a low earthwork and as marks in ploughed fields, and in 1995 archaeologists dug up a bit. Sure enough, it looked Roman.
But in 2009, quarrying by Tarmac was due to destroy 400m of it, giving archaeologists a rare opportunity to expose a long section of road, some of it, crucially, very well preserved. At first, it still looked Roman, from its cambered, cobbled surface on a metre of hardcore and a clay base, to the ditches at the sides with a thin scatter of Roman rubbish. However, dig director Tim Malim noticed that the road had twice been rebuilt, and knew its history could be dated using a technique that tells you when buried mineral grains were last exposed to sunlight.
The unexpected result was a more than 80% chance that the last surface had been laid before the Roman invasion in AD43. Wood in the foundation was radiocarbon-dated to the second century BC, sealing the road's pre-Roman origin. And Malim thinks a huge post that stood in 1500BC close to the crest of the hill was a trackway marker.
Continues:
http://www.guardian.co.uk/science/2011/mar/16/roman-road-made-by-britons
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