Explanipedia

Oxygen-depleted and ferruginous seawater composition imprinted in Early Cretaceous Fe-rich Al-glauconites in marginal marine deposits Open

Arpita Chakraborty, Ayush Srivastava, Brijesh Singh, Jahnavi Punekar, Sudipta Dasgupta , et al. · 2025

Ocean acidification signals through deep time: A review of proxies Open

Subham Patra, Jahnavi Punekar · 2025

Charting the test carbonate content of common late Maastrichtian planktic foraminifera morphotypes Open

Kebenle Kesen, Megh Kanvinde, Anup Kumar Shahi, Kumar Hemant Singh, Jahnavi Punekar · 2025

Spatio-temporal variability in microfossil and geochemical records of Cenomanian-Turonian oceanic anoxic event-2: a review Open

C.P. Sooraj, Shweta Gupta, Jahnavi Punekar · 2024

The Cenomanian-Turonian boundary oceanic anoxic event (OAE-2; Bonarelli event; ∼ 94 Ma) (CTBE)is associated with a species turnover in the marine calcareous microfossil record, widespread marine anoxia, black shale deposition and positive …

The age and extent of the late Maastrichtian calcification stress at Bidart, France Open

Subham Patra, Kebenle Kesen, Gerta Keller, Eric Font, Thierry Adatte , et al. · 2024

The final 0.5 m of the Cretaceous-Paleogene (K/Pg) boundary at Bidart (France) is characterized by geochemical, taphonomic, and biotic vestiges of an ocean acidification event linked with Deccan volcanism. The larger (>150 μm) plankti…

Untangling the biotic stress in the late Maastrichtian Deccan-benchmark interval of Bidart (France) Open

Subham Patra, Gerta Keller, Eric Font, Thierry Adatte, Jahnavi Punekar · 2024

The late Maastrichtian witnessed substantial surges in Deccan volcanism, prompting the hypothesis that these voluminous pulses may have instigated repeated episodes of ocean acidification during this period. The Cretaceous-Palaeogene (K/Pg…

Late Maastrichtian climatic shifts and faunal upheavals at DSDP Site 525A (South Atlantic): Understand the K-Pg boundary crisis in the long-term perspective Open

Brijesh Singh, Jahnavi Punekar, Jorge E. Spangenberg, Gerta Keller · 2023

The extensively studied Cretaceous-Palaeogene (K-Pg) boundary mass extinction of planktic foraminifera (~66 Ma) has been linked with two catastrophic triggers: the Chicxulub impact (Gulf of Mexico) and Deccan volcanism (India). All the stu…

Survivorship of Planktonic Foraminifera in the Cretaceous-Palaeogene Transition: A Carbonate Demand Perspective Open

Kebenle Kesen, Jahnavi Punekar · 2023

The Cretaceous-Palaeogene (K-Pg) boundary interval is marked by the mass extinction of more than 50% of the larger more specialized Cretaceous planktic foraminifera, followed by the extinction of ~33% generalist species (short-term survivo…

Eustatic and environmental implications of a microgastropod shell bed in the Cenomanian–Turonian boundary interval in the Narmada Basin (India) Open

Sooraj Charthamkudam Prakasan, Jahnavi Punekar, Brijesh Singh · 2023

The Cenomanian–Turonian boundary (CTB; ~94 Ma) marks a period of extreme climate warming, the highest sea-levels of the Phanerozoic, and a turnover in marine microfossils and macroinvertebrates. This boundary interval is marked by bl…

The late Maastrichtian calcification crisis in Bidart (France): a benthic environment perspective Open

Subham Patra, Kebenle Kesen, Jahnavi Punekar · 2023

The final ~0.5m interval of the Cretaceous-Paleogene (K-Pg) boundary at Bidart (France) constitutes the “Deccan benchmark” interval characterized by taphonomic and geochemical proxies of ocean acidification linked with Deccan v…

On Planktic Foraminifera Calcification Crisis in the Deccan Benchmark Interval of Bidart, France Open

Jahnavi Punekar, Subham Patra, Gerta Keller · 2022

<p>The Late Maastrichtian Deccan volcanic pulses contributed to a cumulative biotic stress that set the stage for the Cretaceous-Palaeogene boundary (KPB) mass extinction. The high-flux emissions of volcanogenic CO<sub>2</su…

Chicxulub Impact’s Real Age & Mass Extinction’s Real Cause Open

Gerta Keller, Stephen E. Grasby, Hassan Khozyem, Jahnavi Punekar, Paula Mateo , et al. · 2022

<p>After 42 years, the debate over the end-Cretaceous mass extinction still rages with arguments made for Chicxulub impact and Deccan volcanism as the real cause of this catastrophe. We briefly review the evidence for the pre-KPB age…

Paroxysmal Deccan Eruptions linked to End-Cretaceous Mass Extinction Open

Thierry Adatte, Gerta Keller, Jorge E. Spangenberg, Paula Mateo, Jahnavi Punekar , et al. · 2021

<p>The Chicxulub impact in Mexico and Deccan volcanism in India are both linked to the end-Cretaceous mass extinction but the relative timing of the impact, volcanic eruptions, and environmental changes remain controversial, precludi…

Mercury linked to Deccan Traps volcanism, climate change and the end-Cretaceous mass extinction Open

Gerta Keller, Paula Mateo, Johannes Monkenbusch, Nicolas Thibault, Jahnavi Punekar , et al. · 2020

Mercury anomaly, Deccan volcanism and the end-Cretaceous mass extinction Open

Eric Font, Thierry Adatte, Alcídes N. Sial, Luiz Drude de Lacerda, Gerta Keller , et al. · 2016

The contribution of the Deccan Traps (west-central India) volcanism in the CretaceousPaleogene (KPg) crisis is still a matter of debate. Recent U-Pb dating of zircons interbedded \nwithin the Deccan lava flows indicate that the main erupti…

Mercury anomaly, Deccan volcanism and the end-Cretaceous Mass Extinction: REPLY Open

Eric Font, Thierry Adatte, Gerta Keller, Alexandra Abrajevitch, Alcídes N. Sial , et al. · 2016

A multi-proxy approach to decode the end-Cretaceous mass extinction Open

Jahnavi Punekar, Gerta Keller, Hassan Khozyem, Thierry Adatte, Eric Font , et al. · 2015

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