Abstract
Cretaceous-Tertiary (K-T) boundary clays from five sites in Europe and New Zealand are 102-104-fold enriched in elemental C (mainly soot), which is isotopically uniform and apparently comes from a single global fire. The soot layer coincides with the Ir layer, suggesting that the fire was triggered by meteorite impact and began before the ejecta had settled.
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Wolbach, W., Gilmour, I., Anders, E. et al. Global fire at the Cretaceous– Tertiary boundary. Nature 334, 665–669 (1988). https://doi.org/10.1038/334665a0
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DOI: https://doi.org/10.1038/334665a0
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