Výsledky vyhledávání - "Gerta Keller"

Akademický článek

Vegetation response to exceptional global warmth during Oceanic Anoxic Event 2

Autor: Ulrich Heimhofer, Nina Wucherpfennig, Thierry Adatte, Stefan Schouten, Elke Schneebeli-Hermann, Silvia Gardin, Gerta Keller, Sarah Kentsch, Ariane Kujau

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-8 (2018)

The Cretaceous Oceanic Anoxic Event 2 represents one of the warmest episodes in the last 250 million years. Here, the authors present spore-pollen data and temperature estimates (TEX86) across an expanded stratigraphic section illustrating the dynami

Externí odkaz: https://doaj.org/article/9efac2e5ce8a4374bd1a057b40a0e0dc

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

Autor: Brijesh Singh, Jahnavi Punekar, Jorge Spangenberg, Gerta Keller

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 studies of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e4c5d1175438c1a4b4e5c7a18346f4b
https://doi.org/10.5194/egusphere-egu23-14240

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Cadmium as a tracer of volcanism at the Cretaceous-Paleogene boundary

Autor: Steffanie Sillitoe-Kukas, Munir Humayun, Thierry Adatte, Gerta Keller

Major volcanic eruptions like the Deccan have long been invoked as causes of global mass extinctions. Deccan volcanism erupted ~ 600,000 km3 over the span of ~ 700 ka contemporaneously with the end-Cretaceous mass extinction. It has been difficult to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9a5e8eb043023845ec7b81eaac7688e
https://doi.org/10.5194/egusphere-egu23-16993

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Timing and Tempo of Deccan volcanism relative to the KPg extinction revealed by Mercury and Tellurium anomalies

Autor: Thierry Adatte, Marcel Regelous, Hassan Khozyem, Jorge E. Spangenberg, Gerta Keller, Uygar Karabeyoglu, Blair Schoene, Syed F.R. Khadri

Mercury (Hg) and more recently tellurium (Te) are indicator of large-scale volcanism in marine sediments and provide new insights into relative timing between biological and environmental changes, mass extinctions and delayed recovery. Several studie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8f293f1180cab835f653cc6e43ac0449
https://doi.org/10.5194/egusphere-egu23-11057

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Chicxulub Impact Predates the KPB Mass Extinction by 200-230 kyr;Deccan Volcanism, Mercury and Climate change are main causes

Autor: Gerta Keller, Stephen Grasby, Thierry Adatte

Discovery of impact glass in deep water at El Penon, NE Mexico, revealed a 2m thick impact spherule deposit during excavation of an 8m thick late Maastrichtian sequence [1]. The impact spherules are pristine and undisturbed in the late Maastrichtian.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d7b117037bbae4d52704a1f53686e4e6
https://doi.org/10.5194/egusphere-egu23-17344

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Paleoenvironmental implications of Deccan volcanism relative to the Cretaceous-Paleogene mass extinction: evidence from the ‘red bole’ record

Autor: Nikhil Sharma, Thierry Adatte, Torsten Vennemann, Blair Schoene, Gerta Keller, Syed Khadri

Large Igneous Provinces (LIPs) have been widely studied over the past decades due to their likely link to mass extinction events. Previous work involving U-Pb zircon dating of the Deccan lava flows indicates that the main phase-2 began 250 Ka before

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cdd63c05d8d7ed8cc5e80a8bf4c09388
https://doi.org/10.31223/x50t0p

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Cenomanian-Turonian sea-level transgression and OAE2 deposition in the Western Narmada Basin, India

Autor: Paula Mateo, Jorge E. Spangenberg, Maya Chaudhary, Madan L. Nagori, Gerta Keller, Thierry Adatte, B. C. Jaiprakash, A. Nallapa Reddy

Publikováno v: Gondwana Research. 94:73-86

We report the Narmada Seaway began in India during the largest global sea-level transgression and Oceanic Anoxic Event 2 (OAE2) δ13C excursion during the late Cenomanian to early Turonian. The transgression progressed eastward during the Turonian-Co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e756343875d7c7b8917403ed59f931e9
https://doi.org/10.1016/j.gr.2021.02.013

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Evidence of high effusion Deccan volcanism proceeding the KPg boundary at Elles, Tunisia

Autor: Steffanie Sillitoe-Kukas, Munir Humayun, Thierry Adatte, Gerta Keller

Massive volcanic eruptions of the Deccan coincided with the end-Cretaceous mass extinction. Precisely dating when the most intense eruptions occurred is challenging because the resolution of geochronological techniques does not yet resolve events sho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::33870e53e2ccc83afa9e72bf5624afbf
https://doi.org/10.5194/egusphere-egu22-6736

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