Abstract
The criticism by Pasteris and Wopenka of our use of laser–Raman imagery to investigate the carbonaceous make-up of extremely ancient fossils1 focuses only on their Raman signature; however, our interpretation that the carbonaceous matter that makes up these specimens is biogenic is based on several lines of evidence, of which Raman spectroscopy is only one.
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References
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Schopf, J., Kudryavtsev, A., Agresti, D. et al. Images of the Earth's earliest fossils?. Nature 420, 477 (2002). https://doi.org/10.1038/420477a
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DOI: https://doi.org/10.1038/420477a
