Signatures of early microbial life from the Archean (4 to 2.5 Ga) eon
K Lepot - Earth-Science Reviews, 2020 - Elsevier
Abstract The Archean era (4 to 2.5 billion years ago, Ga) yielded rocks that include the
oldest conclusive traces of life as well as many controversial occurrences. Carbonaceous …
oldest conclusive traces of life as well as many controversial occurrences. Carbonaceous …
Manganese oxides, Earth surface oxygenation, and the rise of oxygenic photosynthesis
Oxygenic photosynthesis is arguably the most important biological innovation in Earth's
history, facilitating the transition to a habitable planet for complex life. Dating the emergence …
history, facilitating the transition to a habitable planet for complex life. Dating the emergence …
A 200-million-year delay in permanent atmospheric oxygenation
The rise of atmospheric oxygen fundamentally changed the chemistry of surficial
environments and the nature of Earth's habitability. Early atmospheric oxygenation occurred …
environments and the nature of Earth's habitability. Early atmospheric oxygenation occurred …
Reexamination of 2.5-Ga “whiff” of oxygen interval points to anoxic ocean before GOE
Transient appearances of oxygen have been inferred before the Great Oxygenation Event
(GOE)[∼ 2.3 billion years (Ga) ago] based on redox-sensitive elements such as Mo and S …
(GOE)[∼ 2.3 billion years (Ga) ago] based on redox-sensitive elements such as Mo and S …
The great oxidation event preceded a paleoproterozoic “snowball Earth”
The inability to resolve the exact temporal relationship between two pivotal events in Earth
history, the Paleoproterozoic Great Oxidation Event (GOE) and the first “snowball Earth” …
history, the Paleoproterozoic Great Oxidation Event (GOE) and the first “snowball Earth” …
Claypool continued: Extending the isotopic record of sedimentary sulfate
Abstract The Proterozoic Eon spans Earth's middle age during which many important
transitions occurred. These transitions include the oxygenation of the atmosphere …
transitions occurred. These transitions include the oxygenation of the atmosphere …
Proterozoic seawater sulfate scarcity and the evolution of ocean–atmosphere chemistry
Oceanic sulfate concentrations are widely thought to have reached millimolar levels during
the Proterozoic Eon, 2.5 to 0.54 billion years ago. Yet the magnitude of the increase in …
the Proterozoic Eon, 2.5 to 0.54 billion years ago. Yet the magnitude of the increase in …
Bulk and grain-scale minor sulfur isotope data reveal complexities in the dynamics of Earth's oxygenation
The disappearance of mass-independent sulfur isotope fractionation (S-MIF) within the c. 2.3-
billion-year-old (Ga) Rooihoogte Formation has been heralded as a chemostratigraphic …
billion-year-old (Ga) Rooihoogte Formation has been heralded as a chemostratigraphic …
Reconciling discrepant minor sulfur isotope records of the Great Oxidation Event
Understanding the timing and trajectory of atmospheric oxygenation remains fundamental to
deciphering its causes and consequences. Given its origin in oxygen-free photochemistry …
deciphering its causes and consequences. Given its origin in oxygen-free photochemistry …
Earth's first redox revolution
The rise of molecular oxygen (O2) in the atmosphere and oceans was one of the most
consequential changes in Earth's history. While most research focuses on the Great …
consequential changes in Earth's history. While most research focuses on the Great …