Lead-210 (210Pb) and radiocarbon (AMS 14C) dating were used in conjunction with sedimentological analysis to document the rate and distribution of sedimentation adjacent to Buckiinguy Break, a distributary marsh feeder channel in the southern Macquarie Marshes. The rates of sedimentation determined from the 210Pb analysis of six sediment cores show significant trends in the spatial distribution of recent sedimentation in the Buckiinguy marsh system. Recent sedimentation was greatest near the channel and decreased with distance across the floodplain, leading to the formation of contemporary levees on the channel margin. Differences between the contemporary and long-term sedimentation rates, as well as historical evidence, indicates a recent change in sedimentation regime, which is related to avulsion of Buckiinguy Break approximately 70 to 90 years ago.
|Number of pages||1|
|Publication status||Published - 13 May 2002|
|Event||7th South Pacific Environmental Radioactivity Association Conference - Sydney, Australia|
Duration: 13 May 2002 → 17 May 2002
|Conference||7th South Pacific Environmental Radioactivity Association Conference|
|Period||13/05/02 → 17/05/02|