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the claim

Geochemical signatures of acid rain exist at the Cretaceous-Paleogene boundary

the verdict
SUPPORTED
the evidence backs this
Recorded sources
2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that geochemical signatures of acid rain exist at the Cretaceous-Paleogene boundary?

Yes. Geochemical signatures such as osmium and sulfur isotope anomalies are well-documented at the Cretaceous-Paleogene boundary, confirming significant atmospheric and oceanic perturbations.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked

The analysis

Judged against the evidence record for claims of this kind.

Evidence for · 2
A geochemical clock in earliest Paleogene pelagic carbonates based on the impact‐induced Os isotope excursion at the Cretaceous‐Paleogene boundary
2012
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Ravizza, G. & VonderHaar, D. (2012). A geochemical clock in earliest Paleogene pelagic carbonates based on the impact‐induced Os isotope excursion at the Cretaceous‐Paleogene boundary. peer-reviewed literature. https://doi.org/10.1029/2012pa002301

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More for · 1
Massive perturbations to atmospheric sulfur in the aftermath of the Chicxulub impact.
2022
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CK, J., AL, Z., JD, W., LC, I., TE, Y., C, L., & MW, C. (2022). Massive perturbations to atmospheric sulfur in the aftermath of the Chicxulub impact.. peer-reviewed literature. https://doi.org/10.1073/pnas.2119194119

What does the evidence say?

Judged against the evidence record for claims of this kind.

Receipt History
first checked05 Aug 2026
judged → SUPPORTED · 7205 Aug 2026
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