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the claim
Earth's atmosphere during the Cretaceous warmest period had significantly higher carbon dioxide concentrations
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
3 sources for · 0 against

Geological and proxy evidence consistently indicates that Earth's atmosphere featured significantly elevated carbon dioxide concentrations during the warm periods of the Cretaceous.

Evidence for · 3
Paleo-CO2 variation trends and the Cretaceous greenhouse climate
2014 · cited by 206
The study outlines how Cretaceous atmospheric CO2 levels remained relatively high during this greenhouse period, peaking in the mid-Cretaceous.
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The analysis

The retrieved literature consistently supports the geological consensus that the Cretaceous greenhouse climate was driven by and associated with significantly elevated atmospheric carbon dioxide concentrations, especially during its warmest mid-Cretaceous phases.

More for · 2
Relict sand wedges suggest a high altitude and cold temperature during the Early Cretaceous in the Ordos Basin, North China
2022 · cited by 6
The paper confirms the Cretaceous as a typical greenhouse period characterized by relatively high atmospheric carbon dioxide concentrations and temperatures.
Expedition 392 Scientific Prospectus: Agulhas Plateau Cretaceous Climate
2020 · cited by 4
The research notes that elevated CO2 levels during the mid-Cretaceous supergreenhouse interval resulted in significant global warmth.
The paper trail · every fact has a biography
first checked04 Aug 2026
judged → SUPPORTED · 9004 Aug 2026
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