Fleam Dyke

Fleam Dyke is a linear earthwork between Fulbourn and Balsham in Cambridgeshire, initiated some time between AD 330 and AD 510 [1]. The dyke is located near Cambridge, between Fulbourn and Balsham [1]. It forms a barrier across an open chalkland ridge, bounded near Fulbourn by marshy fenland and near Balsham by 90-metre-high formerly wooded hills [1]. It is three miles long and seven metres high from ditch to bank [1]. In the nineteenth and early twentieth centuries Anglo-Saxon weapons and burials were found [1]. An excavation in 1991, on occasion of widening the A11 road, established by radiocarbon dating that it had been built in several phases, the first between AD 330 and 510, and the last between AD 450 and 620 [1].