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 …

Carbonate sediments and rocks are valuable archives of Earth's past whose geochemical
compositions inform our understanding of Earth's surface evolution. Yet carbonates are also …

Piecing together the history of carbon (C) perturbation events throughout Earth's history has
provided key insights into how the Earth system responds to abrupt warming. Previous …

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

The role of O2 in the evolution of early animals, as represented by some members of the
Ediacara biota, has been heavily debated because current geochemical evidence paints a …

A hypothesized rise in oxygen levels in the Neoproterozoic, dubbed the Neoproterozoic
Oxygenation Event, has been repeatedly linked to the origin and rise of animal life …

Widespread marine anoxia is hypothesized as the trigger for the second pulse of the Late
Ordovician (Hirnantian) mass extinction based on lithologic and geochemical proxies that …

The geochemistry of the carbonate sedimentary record is invaluable for understanding the
ancient seawater evolution of carbon and redox-sensitive elements. However, the …

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 …

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 …