A Late Prehistoric Timber Alignment in the Waveney Valley, Suffolk: Excavations at Barsham Marshes

Abstract This paper describes the results of excavations and associated palaeoenvironmental analyses at Barsham Marshes, Suffolk, England. The site is a triple post alignment of oak stakes built at the edge of a palaeochannel of the River Waveney. The alignment has been traced for over 30 m but neither terminus of the site has been excavated. Dendrochronological dating of the timbers has produced a range of felling dates between 8 BC and AD 8 indicating a late Iron Age date for the structure. No other cultural material was recovered. Palaeoenvironmental analyses of the associated deposits indicate that the site was located at the edge of a shallow channel of the River Waveney with local aquatic and alder carr vegetation and evidence for more open scrub and pastoral environments in the wider landscape. This channel appears to have infilled by the 11th century AD and is overlain by a thin layer of humified peat, corresponding to the uppermost level of preservation of the stakes. It is likely that any superstructure originally supported by the stakes had finally decomposed or been dismantled by this time. The site is compared to that of Beccles some 3 km down river where excavations have revealed a triple post alignment also dating to the late Iron Age but with evidence for activity during the Romano-British period. The possible form and function(s) of the sites are discussed.