Future Webinars

Webinar registration and access details

Carbonate diagenesis: What can we learn from experimental work?

Adrian Immenhauser - Ruhr-University Bochum

01/06/2022 4:00 pm (London)

This presentation documents coupled field, analytical and experimental work with a focus on carbonate diagenesis. Case examples range from speleothems to burial diagenetic carbonates. The potential and limits of state-of-the-art experimental work and its bearing on ancient carbonate archives are documented and discussed.

The Ammonium Ocean following the end-Permian mass extinction

Yadong Sun - GeoZentrum Nordbayern, University of Erlangen-Nuremberg

15/06/2022 4:00 pm (London)

The nitrogenous nutrient in the modern (and most oxygenated) ocean is dominated by nitrate. However, nitrate can be quickly removed during water column deoxygenation. Oceanic nitrate inventory can be greatly reduced during ocean anoxic events. This occurred during the onset of the end-Permian mass extinction and was followed by a shift in oceanic nutrient-N inventory from nitrated dominated to ammonium dominated state. The consequences included a boom of diazotrophs and potentially ammonium toxicity affecting marine animals.

Rolling Stones & Muddy Waters: Depositional processes and stratigraphic architecture of polydisperse, conglomeratic gravity currents and their responses to topography

Tim Cullen - University of Bergen

29/06/2022 4:00 pm (London)