Extended Data Fig. 10: Synchrotron-based X-ray fluorescence major-to-elemental mapping of the Cabrières Biota.
From: The Cabrières Biota (France) provides insights into Ordovician polar ecosystems
(a) Optical photograph under polarised light of the assemblage UCBL-FSL713602 shown in Fig. 1e. (b, c) False-colour overlays of manganese (red), iron (green) and potassium (blue) (b), and arsenic (red), iron (green) and potassium (blue) (c) distributions from the box in (a). Acquisition parameters: 200 μm steps, 80 ms dwell time, 51,100 pixels. (d) Optical photograph under polarised light of sponge UCBL-FSL713618. (e) Close-up view from the box in (d). (f, g) False-colour overlays of manganese (red), iron (green) and potassium (blue) distributions from the corresponding boxes in (e) and (f). Acquisition parameters: 200 μm steps, 60 ms dwell time, 6,150 pixels in (f); 100 μm steps, 60 ms dwell time, 4,800 pixels in (g). The white circle in (g) locates the XANES analysis shown in Fig. 4d. (h) Average µXRF spectra and main elemental contributions from the corresponding numbered boxes in c (156 pixels) and f (208 pixels). Scale bars represent 1 cm in (a), (b), (c) and (d), 5 mm in (e) and (f), and 1 mm in (g).
