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Showing 1–4 of 4 results
Advanced filters: Author: Kyger C. Lohmann Clear advanced filters

  • The cause of the end-Cretaceous mass extinction is still debated due to difficulties separating the influences of two closely-timed potential causal events (massive volcanism and meteorite impact). Here, the authors link the extinction to both kill mechanisms through a new paleotemperature record.

    • Sierra V. Petersen
    • Andrea Dutton
    • Kyger C. Lohmann
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-9

  • The Palaeocene–Eocene thermal maximum (PETM) is a well-known abrupt warming that occurred at about 55.8 Myr ago and is usually thought to have been caused by a large release of greenhouse gases, as recorded in a large carbon isotope excursion. Yet some marine evidence suggests that in fact the warming came first. Here it is shown that continental warming of about 5 °C preceded the excursion in the Bighorn Basin, Wyoming. Thus the PETM seems to have been caused by at least two separate warming events.

    • Ross Secord
    • Philip D. Gingerich
    • Kenneth G. MacLeod
    Research
    Nature
    Volume: 467, P: 955-958

  • The relative role of the Deccan Traps volcanic activity versus the role of the Chicxulub impact event in terms of potential contributions to the Cretaceous-Paleogene (K-Pg) mass extinction has been subject to longstanding debate. Here, the authors observe a global signal of abruptly increased ocean temperatures and elevated [Hg] in the same biogenic carbonate specimens, prior to the impact event but aligning with the onset of Deccan volcanism.

    • Kyle W. Meyer
    • Sierra V. Petersen
    • Ian Z. Winkelstern
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-8