Oceanic anoxia and extinction in the latest Ordovician

M Liu, D Chen, L Jiang, RG Stockey, D Aseal… - Earth and Planetary …, 2022 - Elsevier
Abstract The Late Ordovician (Hirnantian) mass extinction (LOME) was marked by two
discrete pulses of high species turnover rates attributed to glacial cooling (LOME-1) and …

[HTML][HTML] Dynamic oceanic redox conditions across the late Cambrian SPICE event constrained by molybdenum and uranium isotopes

Z Zhao, X Pang, C Zou, AJ Dickson, A Basu… - Earth and Planetary …, 2023 - Elsevier
Abstract The Steptoean Positive Carbon Isotope Excursion Event (SPICE) represents one of
the largest carbon cycle perturbations in the Cambrian, which coincided with climatic …

Molybdenum isotope-based redox deviation driven by continental margin euxinia during the early Cambrian

Z Qin, D Xu, B Kendall, X Zhang, Q Ou, X Wang… - … et Cosmochimica Acta, 2022 - Elsevier
Oceanic redox changes may be a key environmental trigger for the “Cambrian explosion”.
However, a hypothesized predominantly oxygenated early Cambrian ocean, inferred from …

Rapid marine oxygen variability: Driver of the Late Ordovician mass extinction

NP Kozik, SA Young, SM Newby, M Liu, D Chen… - Science …, 2022 - science.org
The timing and connections between global cooling, marine redox conditions, and biotic
turnover are underconstrained for the Late Ordovician. The second most severe mass …

The Ordovician of Scandinavia: a revised regional stage classification

AT Nielsen, P Ahlberg, JOR Ebbestad… - Geological Society …, 2023 - lyellcollection.org
Abstract The Ordovician of Scandinavia (ie Denmark, Norway and Sweden) has been
investigated for over two centuries and, through time, various chronostratigraphic schemes …

Steep oceanic DIC δ13C depth gradient during the Hirnantian Glaciation

S Yang, J Fan, TJ Algeo, GA Shields, Y Zhou, C Li… - Earth-Science …, 2024 - Elsevier
The Hirnantian carbon isotopic excursion (HICE) was characterized by a positive δ 13 C
excursion (up to~+ 7‰) of oceanic dissolved inorganic carbon (DIC). However its …

Progressive marine oxygenation and climatic cooling at the height of the Great Ordovician Biodiversification Event

NP Kozik, SA Young, P Ahlberg, A Lindskog… - Global and Planetary …, 2023 - Elsevier
The oxygen content of ancient seawater has been hypothesized to be a major controlling
factor for biodiversity throughout Earth's history. The Great Ordovician Biodiversification …

Stable ocean redox during the main phase of the Great Ordovician Biodiversification Event

Á Del Rey, CMØ Rasmussen, M Calner, R Wu… - … Earth & Environment, 2022 - nature.com
Abstract The Great Ordovician Biodiversification Event (GOBE) represents the greatest
increase in marine animal biodiversity ever recorded. What caused this transformation is …

Uranium and molybdenum isotope evidence for globally extensive marine euxinia on continental margins and in epicontinental seas during the Devonian …

S Yang, X Lu, X Chen, W Zheng, JD Owens… - … et Cosmochimica Acta, 2023 - Elsevier
Abstract The end-Devonian Hangenberg Crisis was one of the biggest Phanerozoic mass
extinctions. However, the mechanism (s) that triggered this event is still debated. In this …

Paired carbon isotope chemostratigraphy across the Ordovician–Silurian boundary in central East Baltic: regional and global signatures

O Hints, L Ainsaar, A Lepland, M Liiv, P Männik… - Palaeogeography …, 2023 - Elsevier
The latest Ordovician and earliest Silurian carbonate succession of the East Baltic region
has served as a global reference for studying the Hirnantian mass extinction and global …