Oceanic anoxia and extinction in the latest Ordovician
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 …
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
Abstract The Steptoean Positive Carbon Isotope Excursion Event (SPICE) represents one of
the largest carbon cycle perturbations in the Cambrian, which coincided with climatic …
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
Oceanic redox changes may be a key environmental trigger for the “Cambrian explosion”.
However, a hypothesized predominantly oxygenated early Cambrian ocean, inferred from …
However, a hypothesized predominantly oxygenated early Cambrian ocean, inferred from …
Rapid marine oxygen variability: Driver of the Late Ordovician mass extinction
The timing and connections between global cooling, marine redox conditions, and biotic
turnover are underconstrained for the Late Ordovician. The second most severe mass …
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 …
investigated for over two centuries and, through time, various chronostratigraphic schemes …
Steep oceanic DIC δ13C depth gradient during the Hirnantian Glaciation
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 …
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
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 …
factor for biodiversity throughout Earth's history. The Great Ordovician Biodiversification …
Stable ocean redox during the main phase of the Great Ordovician Biodiversification Event
Abstract The Great Ordovician Biodiversification Event (GOBE) represents the greatest
increase in marine animal biodiversity ever recorded. What caused this transformation is …
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 …
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 …
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
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 …
has served as a global reference for studying the Hirnantian mass extinction and global …