Oceanic anoxic events (OAEs) record profound changes in the climatic and
paleoceanographic state of the planet and represent major disturbances in the global …

This review focuses on the rapidly growing field of natural 238U/235U variability, largely
driven by the technical advances in the measurement of U isotope ratios by mass …

Abstract Large Igneous Provinces (LIPs) can have a significant global climatic effect as
monitored by sedimentary trace and isotopic compositions that record paleo …

The present-day 238U/235U ratio has fundamental implications for uranium-lead
geochronology and cosmochronology. A value of 137.88 has previously been considered …

Recent studies have identified a range of new applications of trace-metal concentration data
in the analysis of paleoceanographic systems. In restricted anoxic marine systems, trace …

Delayed Earth system recovery following the end-Permian mass extinction is often attributed
to severe ocean anoxia. However, the extent and duration of Early Triassic anoxia remains …

The terminal Ediacaran Period witnessed the decline of the Ediacara biota (which may have
included many stem-group animals). To test whether oceanic anoxia might have played a …

To improve estimates of the extent of ocean oxygenation during the late Ediacaran Period,
we measured the U and Mo isotope compositions of euxinic (anoxic and sulfidic) organic …

Periods of oceanic anoxia have had a major influence on the evolutionary history of Earth
and are often contemporaneous with mass extinction events. Changes in global (as …

Explaining the~ 5-million-year delay in marine biotic recovery following the latest Permian
mass extinction, the largest biotic crisis of the Phanerozoic, is a fundamental challenge for …