The construction of the earliest earthwork sites in LOCATION@1 began during the early MISC@1 -LRB- c. NUMBER@1 BC NUMBER@2 BC -RRB- in the form of long barrows used for communal burial and the first causewayed enclosures , sites which have parallels on the continent .

The construction of the earliest earthwork sites in LOCATION@1 began during the early MISC@1 -LRB- c. NUMBER@1 BC - NUMBER@2 BC -RRB- in the form of long barrows used for communal burial .
