Figure 4
Sedimentary analysis of core Monteith-A relative to sea level and key proxies from offshore marine cores MD03-2611 and MD03-2607. Calibrated ages together with the grainsize distribution, moisture content, dry bulk density, TOC and sediment accumulation rate led to the interpretation of five units: basal weathered clay (Unit 1), lowstand braided fluvial faces (Unit 2), transgressive single-thread fluvial (Unit 3), transitional fluvial bayhead delta (Unit 4) and central basin facies (Unit 5). The top 1.65 m is potentially disturbed due to agricultural activities at the site. Fluctuations in the clay/silt ratio and illite percentage are given for offshore marine cores MD03-2607 and MD03-2611 respectively6,11. The timing of the Holocene sea-level highstand (7,000–6,000 yr BP) is demarcated by blue shading15,16, and the 8,500–8,200 yr BP worldwide estuarine initiation event by green shading13,27,35,36.
