atmosphere had no free diatomic elemental oxygen (O2). Small quantities of oxygen were released by geological and biological processes, but did not build...

Geological history of oxygen Hypoxia (environmental) for O 2 depletion in aquatic ecology Ocean deoxygenation Hypoxia (medical), a lack of oxygen Limiting...

climate. Cycles in the ratio mirror climate changes in the geological history of Earth. Oxygen (chemical symbol O) has three naturally occurring isotopes:...

or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis or Oxygen Holocaust, was a time interval during the Earth's...

permanganate also releases oxygen upon heating, but the yield is modest: 2 KMnO4 → MnO2 + K2MnO4 + O2 Geological history of oxygen Great Oxygenation Event...

that relates geologic strata to time Geological history of oxygen History of Earth – Overview of Earth's history Precambrian – History of Earth 4600–539...

The geological history of Earth follows the major geological events in Earth's past based on the geologic time scale, a system of chronological measurement...

lineages of Bacteria Biodiesel Cyanobiont Endosymbiotic theory Geological history of oxygen Hypolith Some botanists restrict the name algae to protist eukaryotes...

of air may refer to: Geological history of oxygen Great Oxygenation Event This disambiguation page lists articles associated with the title Origin of...

Bacterial phyla, the other major lineages of domain Bacteria Biofertilizer Cyanobiont Geological history of oxygen Great Oxygenation Event Green algae Phytoplankton...

The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological...

can convert to oxygen. The exact cause of the variation of the amount of oxygen in the atmosphere is not known. Periods with much oxygen in the atmosphere...

understanding of the main events of Earth's past, characterized by constant geological change and biological evolution. The geological time scale (GTS)...

lineages of domain Bacteria Biofertilizer Biofuel Cyanobacteria Cyanobacterial RNA thermometer Cyanobiont Cyanothece Geological history of oxygen Great Oxygenation...

a geologic time interval between around 850 and 540 million years ago during the Neoproterozoic era, which saw a very significant increase in oxygen levels...

atmosphere, particularly that of Earth, at some unspecified time in the geological past. When regarding geological history of Earth, the paleoatmosphere...

The oxygen minimum zone (OMZ), sometimes referred to as the shadow zone, is the zone in which oxygen saturation in seawater in the ocean is at its lowest...

rover Perseverance investigating the production of oxygen on Mars. On April 20, 2021, MOXIE produced oxygen from carbon dioxide in the Martian atmosphere...

of high oxygen level, however some of those large arthropod records are also known from period with relatively low oxygen, which suggest high oxygen pressure...

Anoxic waters are areas of sea water, fresh water, or groundwater that are depleted of dissolved oxygen. The US Geological Survey defines anoxic groundwater...

serve as an oxygen sink, the process allowed the buildup of an oxygen-rich atmosphere. This second, follow-on event is known as the oxygen catastrophe...

their metabolism. Photosynthesis usually refers to oxygenic photosynthesis, a process that produces oxygen. Photosynthetic organisms store the chemical energy...

The geological history of North America comprises the history of geological occurrences and emergence of life in North America during the interval of time...

The Pasteur point is a level of oxygen (about 0.3% by volume which is less than 1% of Present Atmospheric Level or PAL) above which facultative aerobic...

This timeline of natural history summarizes significant geological and biological events from the formation of the Earth to the arrival of modern humans...

Multiple historical origins of vertebrate flight also correlate temporally with geological periods of increased oxygen concentration and atmospheric...

scientific community. The geological history of the Moon has been analysed into six major epochs, called the lunar geologic timescale. Starting about...

actually had very low oxygen levels and no geological evidence of glaciations. The oceans during the Boring Billion may have been oxygen-poor, nutrient-poor...

to have formed in sea water as the result of oxygen production by photosynthetic cyanobacteria. The oxygen combined with dissolved iron in Earth's oceans...

evolution of multicellular life towards the end of the era. The Proterozoic Eon was a very tectonically active period in the Earth's history. Oxygen changed...