Figure 4
From: New constraints on the postglacial shallow-water carbonate accumulation in the Great Barrier Reef
Description of the postglacial thickness method for the calculation of reef deposits: (a) Vertical accretion rates (VA) and maximum accretion thickness were extracted from trends of postglacial thickness vs. geological age using the dated core samples from the IODP Exp. 325 (Webster et al.21, Appendix 3). These rates were converted into an equivalent rate relative to the past sea level increase (transformed accretion rate VASL) using a composite sea level curve (Fig. 5, Appendix 6). (b) The marine-flooded areas for each postglacial sea level (FASL)49 were multiplied by the thickness corresponding to one sea level step, according to the previously calculated rate VASL. Flooded areas were not allowed to accumulate reef thickness beyond the maximum observed in (a). This can be represented as a thickness matrix (b) where each sea level step (t0, t1, …, tn) has a thickness vector applicable to the different flooded-area polygons (see Appendix 5 for full calculations).
