Editing Seahenge (section)

== Preliminary excavation ==
Archaeological excavation at Seahenge began October&nbsp;1998, under site director Mark Brennand of the Norfolk Archaeological Unit. It proved a difficult site to excavate. Sea tides restricted trial trench excavating work to between one and four hours per day.<ref name=Watson-2005/>{{rp|style=ama|pp= 17–21}} A [[dendrochronology|dendrochronological]] sample extracted from the stump was sent for analysis at [[Sheffield University]]. By January&nbsp;1999, preliminary results indicated a Bronze Age monument.<ref name=Watson-2005/>{{rp|style=ama|pp= 24–25}} Despite projected expense, English Heritage decided full excavation would be worthwhile, because the site had begun to suffer from erosion: Sections of wood had been exposed to corrosive oxygen and salt brine after millennia protected in the mud.<ref name=Watson-2005/>{{rp|style=ama|p= 26}}