Carbon Cycling During Oceanic Anoxic Event 2: Compound‐Specific Carbon Isotope Evidence From the Western Interior Seaway

Boudinot, F. Garrett; Kopf, Sebastian; Dildar, Nadia; Sepúlveda, Julio

doi:10.1029/2021pa004287

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Cited by 3 publications

References 108 publications

(258 reference statements)

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Lead-up and manifestation of the Oceanic Anoxic Event 2 at the DSDP Site 398 (Vigo Seamount, NW Iberian offshore): Palynological and geochemical insights

Rodríguez-Barreiro,

Santos,

Villanueva-Amadoz

et al. 2024

Palaeogeography, Palaeoclimatology, Palaeoecology

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Lead-up and manifestation of the Oceanic Anoxic Event 2 at the DSDP Site 398 (Vigo Seamount, NW Iberian offshore): Palynological and geochemical insights

Rodríguez-Barreiro,

Santos,

Villanueva-Amadoz

et al. 2024

Palaeogeography, Palaeoclimatology, Palaeoecology

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A tropically hot mid-Cretaceous North American Western Interior Seaway

Jones

Petersen

Curley

2022

Geology

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The mid-Cretaceous thermal maximum (KTM) during Cenomanian to Santonian times from ca. 100 to 83 Ma is considered among Earth’s warmest sustained intervals of the Phanerozoic. The time interval is also characterized by major paleoceanographic changes in the form of an oceanic anoxic event and the flooding of epicontinental seaways, such as the Western Interior Seaway in North America. We report carbonate clumped isotope (Δ47) paleotemperatures (TΔ47) of the KTM measured from Cenomanian oyster fossils of the Western Interior Seaway. Following screening of specimens for carbonate diagenesis and exclusion of geographic zones with evidence consistent with solid-state Δ47 reordering, a mean TΔ47 of 28–34 °C (95% confidence interval for the standard error of mean) for primary oyster calcite quantifies extreme mid-latitude warmth in North America. When combined with existing Campanian and Maastrichtian marine TΔ47 records, the new data constrain Late Cretaceous temperature trends underlying the evolution of North American faunal and stratigraphic records. These TΔ47 data from the peak KTM highlight the potential of this proxy to quantitatively resolve the upper thermal limits of Phanerozoic greenhouse climates.

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Compound-specific carbon isotope results from the SH#1 core analyzed and processed at University of Colorado Boulder

Boudinot¹,

Kopf²,

Dildar³

et al. 2021

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Carbon Cycling During Oceanic Anoxic Event 2: Compound‐Specific Carbon Isotope Evidence From the Western Interior Seaway

Abstract: Oceanic Anoxic Event 2 (OAE2; ∼94 Ma) was an interval of global change characterized by elevated atmospheric CO 2

Cited by 3 publications

References 108 publications

Lead-up and manifestation of the Oceanic Anoxic Event 2 at the DSDP Site 398 (Vigo Seamount, NW Iberian offshore): Palynological and geochemical insights

Lead-up and manifestation of the Oceanic Anoxic Event 2 at the DSDP Site 398 (Vigo Seamount, NW Iberian offshore): Palynological and geochemical insights

A tropically hot mid-Cretaceous North American Western Interior Seaway

Compound-specific carbon isotope results from the SH#1 core analyzed and processed at University of Colorado Boulder

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