Trace elements are actively cycled in seawater, are essential components for marine life,
and are transported to the seafloor where they can become enriched in marine sediments …

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 …

The emergence and diversification of early animals is commonly thought to have coincided
with atmosphere and ocean oxygenation across the terminal Neoproterozoic and early …

Northeastern Egypt is one of the most important exposures in the Middle East and North
Africa to study Jurassic facies. The present study analyzes 130 thin sections from a …

The protracted oxygenation of the ocean-atmosphere system is one of the most fundamental
changes to the Earth system through its history. The uranium isotopic composition (238 …

The oxygenation of Earth's surface environment dramatically altered key biological and
geochemical cycles and ultimately ushered in the rise of an ecologically diverse biosphere …

Inferring redox conditions for ancient marine environments is critical to our understanding of
biogeochemical cycles over Earth history. Because of the redox sensitivity of cerium (Ce) …

Anoxic and iron-rich oceanic conditions prevailed throughout most of the Archean and
Proterozoic (4000 to c. 540 million years ago, Ma), but the oceans are hypothesised to have …

Although Ce anomalies are commonly used to reconstruct past seawater redox conditions,
published interpretations are based on various proxy materials and analytical approaches …