Archean & Earth - Unionpedia, the concept map

Accretion (astrophysics)

In astrophysics, accretion is the accumulation of particles into a massive object by gravitationally attracting more matter, typically gaseous matter, into an accretion disk.

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Associated Press

The Associated Press (AP) is an American not-for-profit news agency headquartered in New York City.

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Astrobiology (journal)

Astrobiology is a peer-reviewed scientific journal covering research on the origin, evolution, distribution and future of life across the universe.

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Atmosphere of Earth

The atmosphere of Earth is composed of a layer of gas mixture that surrounds the Earth's planetary surface (both lands and oceans), known collectively as air, with variable quantities of suspended aerosols and particulates (which create weather features such as clouds and hazes), all retained by Earth's gravity.

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Basalt

Basalt is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon.

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Biogenic substance

A biogenic substance is a product made by or of life forms.

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Carbon dioxide

Carbon dioxide is a chemical compound with the chemical formula.

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Chicxulub crater

The Chicxulub crater is an impact crater buried underneath the Yucatán Peninsula in Mexico.

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Continental crust

Continental crust is the layer of igneous, metamorphic, and sedimentary rocks that forms the geological continents and the areas of shallow seabed close to their shores, known as continental shelves.

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Earliest known life forms

The earliest known life forms on Earth may be as old as 4.1 billion years old (or Ga) according to biologically fractionated graphite inside a single zircon grain in the Jack Hills range of Australia.

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Eukaryote

The eukaryotes constitute the domain of Eukarya or Eukaryota, organisms whose cells have a membrane-bound nucleus.

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Excite (web portal)

Excite is an American website (historically a web portal) operated by IAC that provides outsourced internet content such as a metasearch engine, with outsourced weather and news content on the main page.

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Faint young Sun paradox

The faint young Sun paradox or faint young Sun problem describes the apparent contradiction between observations of liquid water early in Earth's history and the astrophysical expectation that the Sun's output would be only 70 percent as intense during that epoch as it is during the modern epoch.

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Geologic time scale

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

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Granite

Granite is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase.

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Graphite

Graphite is a crystalline form of the element carbon.

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Great Oxidation Event

The Great Oxidation Event (GOE) or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis or Oxygen Holocaust, was a time interval during the Earth's Paleoproterozoic era when the Earth's atmosphere and shallow seas first experienced a rise in the concentration of free oxygen.

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History of Earth

The history of Earth concerns the development of planet Earth from its formation to the present day.

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Kitaa

Kitaa, originally Vestgrønland ("West Greenland"), is a former administrative division of Greenland.

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Komatiite

Komatiite is a type of ultramafic mantle-derived volcanic rock defined as having crystallised from a lava of at least 18 wt% magnesium oxide (MgO).

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Late Heavy Bombardment

The Late Heavy Bombardment (LHB), or lunar cataclysm, is a hypothesized astronomical event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, at a time corresponding to the Neohadean and Eoarchean eras on Earth.

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Mafic

A mafic mineral or rock is a silicate mineral or igneous rock rich in magnesium and iron.

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Mantle (geology)

A mantle is a layer inside a planetary body bounded below by a core and above by a crust.

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Metasedimentary rock

In geology, metasedimentary rock is a type of metamorphic rock.

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Microbial mat

A microbial mat is a multi-layered sheet of microorganisms, mainly bacteria and archaea, or bacteria alone.

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Mindspark Interactive Network

Mindspark Interactive Network, Inc. was an operating business unit of IAC known for the development and marketing of entertainment and personal computing software, as well as mobile application development.

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Nature (journal)

Nature is a British weekly scientific journal founded and based in London, England.

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Nature Geoscience

Nature Geoscience is a monthly peer-reviewed scientific journal published by the Nature Publishing Group.

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Ocean world

An ocean world, ocean planet or water world is a type of planet that contains a substantial amount of water in the form of oceans, as part of its hydrosphere, either beneath the surface, as subsurface oceans, or on the surface, potentially submerging all dry land.

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Orogeny

Orogeny is a mountain-building process that takes place at a convergent plate margin when plate motion compresses the margin.

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Oxygen

Oxygen is a chemical element; it has symbol O and atomic number 8.

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Photosynthesis

Photosynthesis is a system of biological processes by which photosynthetic organisms, such as most plants, algae, and cyanobacteria, convert light energy, typically from sunlight, into the chemical energy necessary to fuel their metabolism.

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Plate tectonics

Plate tectonics is the scientific theory that Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago.

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Proceedings of the National Academy of Sciences of the United States of America

Proceedings of the National Academy of Sciences of the United States of America (often abbreviated PNAS or PNAS USA) is a peer-reviewed multidisciplinary scientific journal.

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Redox

Redox (reduction–oxidation or oxidation–reduction) is a type of chemical reaction in which the oxidation states of the reactants change.

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Rheology

Rheology is the study of the flow of matter, primarily in a fluid (liquid or gas) state but also as "soft solids" or solids under conditions in which they respond with plastic flow rather than deforming elastically in response to an applied force.

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Sandstone

Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains, cemented together by another mineral.

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Supercontinent

In geology, a supercontinent is the assembly of most or all of Earth's continental blocks or cratons to form a single large landmass.

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Volcano

A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.

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Western Australia

Western Australia (WA) is a state of Australia occupying the western third of the land area of the Australian continent.

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Zircon

Zircon is a mineral belonging to the group of nesosilicates and is a source of the metal zirconium.

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