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DatasetsYounger Dryas impact hypothesis40Ar/39Ar and zircon U-Pb data for the Hiawatha impact structure (Kenny et al. 2022)
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40Ar/39Ar and zircon U-Pb data for the Hiawatha impact structure (Kenny et al. 2022)

Step-heating and spot-age tables in the Supplementary Materials; they date the structure to 57.99 ± 0.54 Ma.

Younger Dryas impact hypothesisYounger Dryas impact hypothesisVersion 1.0Licence CC-BY-4.0Updated 26 Oct 2026

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