Sediment composition and texture has been determined by thin-section analysis (n = 8), using a petrographic microscope (Olympus BH-2) and a Scanning Electron Microscope (
Supra55, Zeiss). The relative abundance of different microfossils was estimated using a visual percentage chart
44 . The resulting values are integrated into an existing dataset including 23 smear slides (shipboard data, IODP Exp. 356). Optic data was complemented by the shipboard derived lightness log, which is a unitless spectrophotometric parameter derived from the reflectance of visible light on split cores
43 . Sample mineralogy was analysed using a Siemens
D5000 x-ray diffractometer. A total of 43 samples were oven-dried, grounded and mounted on sample holders. Two additional samples have been sieved for their mud (<63 µm) fraction which was then measured separately. The measurements were conducted over an angle field of 66° (4–70°) with a step size of 4 * 10
-30 per second. Identification and quantification of different mineral phases was achieved by standard Rietveld refinement using the software
DIFFRAC EVA (ver. 8.0, Bruker) and Profex (ver. 3.14.0). Non-destructive semi-quantitative determination of single component mineralogy was achieved by 2-D XRD measurements
45 (link) (D8-Bruker, resident time per spot = 10 Minutes). Measured components include ooids, peloids and a variety of different bryozoa.
Hallenberger M., Reuning L., Gallagher S.J., Back S., Ishiwa T., Christensen B.A, & Bogus K. (2019). Increased fluvial runoff terminated inorganic aragonite precipitation on the Northwest Shelf of Australia during the early Holocene. Scientific Reports, 9, 18356.