Water plays a critical role in erosion and sediment transport and this relationship is most
evident in the hyperarid Atacama Desert of Northern Chile, a region characterized by …

Marine authigenic carbonates form shallow-water microbialites, mud mounds, and
hydrocarbon-seep deposits and contain appreciable amounts of trace elements that yield …

Existing redox classifications and the calibrations of elemental proxies to modern
environmental redox scales are in need of re-evaluation. Here, we review environmental …

There has been extensive debate about the history of Earth's oxygenation and the role that
land plant evolution played in shaping Earth's ocean–atmosphere system. Here we use the …

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 …

The determination of La and Ce anomalies in natural waters, biological samples and
biogenic sedimentary rocks can provide unique information on biogeochemical processes in …

Resolving how Earth surface redox conditions evolved through the Proterozoic Eon is
fundamental to understanding how biogeochemical cycles have changed through time. The …

Hydrogeochemical controlling variables for the high rate of groundwater contamination in a
shallow hard rock aquifer of the semi-arid region of Medchal District, Telangana State, South …

The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated
concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago …

The oceans at the start of the Neoproterozoic Era (1,000–541 million years ago, Ma) were
dominantly anoxic, but may have become progressively oxygenated, coincident with the rise …