Figure 3

Physical and selected biogeochemical sediment properties and age-depth model for 117Q BC and 117Q. From left to right: 117Q Computerised tomography (CT) scan image and CT number (#). Denser areas appear whiter in the CT scan image. The sand fraction (% > 63 µm) measured by wet sieving (black). Variations in XRF-measured elements calcium (Ca; black) and sum of Al, K and Si (grey), both are shown as ratio to the sum of total elemental counts. Percentage (weight) of total sulphur (TS; grey) and total organic carbon (TOC; yellow) and biogenic silica fluxes (BSi; dark green). Calculated sedimentation rates (cm yr^-1) are shown in black. The median age (modelled) -depth relationship constructed in BACON for 117Q and 117Q BC (insert) are shown with purple-filled circles representing ²¹⁰Pb-dated intervals, green-filled circles indicating the bulk organic carbon ¹⁴C-dated intervals and open circles the ¹⁴C-dated intervals (biogenic carbonate). The solid black line indicates the median modelled age-depth relationship and the grey dashed lines indicate maximum and minimum modelled ages in the 95% confidence interval. The grey bar indicates the stratigraphic interval where 117Q BC and 117Q proxy data overlap.