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Thermal diagenesis is generally seen as detrimental to the preservation of organic biosignatures. Using synchrotron-based XANES data, Alleon et al.find preservation of the molecular signatures of organic microfossils from the 1.88 Ga Gunflint cherts.

Nature Communications 7 Article number: 11977 (2016); Published 17 June 2016; Updated 14 August 2017 This Article contains errors in the figure numbering and referencing that were introduced during the production process. Figures 4, 5 and 6 should be labelled as Figs 5, 6 and 4, respectively. In paragraph 9 of the Discussion section, the penultimate sentence should read ‘Yet, Triple Junction and Mink Mountain organic microfossils exhibit very similar C-XANES spectra (Fig.