The long history of life on Earth has unfolded as a cause-and-effect relationship with the
evolving amount of oxygen (O2) in the oceans and atmosphere. Oxygen deficiency …

Iron formations (IF) represent an iron-rich rock type that typifies many Archaean and
Proterozoic supracrustal successions and are chemical archives of Precambrian seawater …

Phosphorus is a limiting nutrient that is thought to control oceanic oxygen levels to a large
extent,–. A possible increase in marine phosphorus concentrations during the Ediacaran …

Few topics in geobiology have been as extensively debated as the role of Earth's
oxygenation in controlling when and why animals emerged and diversified. All currently …

Oxygenation of Earth's atmosphere and oceans occurred across three major steps during
the Paleoproterozoic, Neoproterozoic, and Paleozoic eras, with each increase having …

Rising oceanic and atmospheric oxygen levels through time have been crucial to enhanced
habitability of surface Earth environments. Few redox proxies can track secular variations in …

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 …

Abstract The Proterozoic Eon spans Earth's middle age during which many important
transitions occurred. These transitions include the oxygenation of the atmosphere …

The oxygen content of the oceans is susceptible to climate change and has declined in
recent decades, with the largest effect in oxygen-deficient zones (ODZs), that is, mid-depth …