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The Archean (IPA: /ɑːrˈkiːən/ ar-KEE-ən, also spelled Archaean or Archæan), in older sources sometimes called the Archaeozoic, is the second of the four...

Hadean eon was succeeded by the Archean eon, with the Late Heavy Bombardment hypothesized to have occurred at the Hadean-Archean boundary. Hadean rocks are...

Archean subduction is a contentious topic involving the possible existence and nature of subduction in the Archean, a geologic eon extending from 4.0–2...

the longest eon of Earth's geologic time scale. It is preceded by the Archean and followed by the Phanerozoic, and is the most recent part of the Precambrian...

ɑːrˈkiːən/ EE-oh-ar-KEE-ən; also spelled Eoarchaean) is the first era of the Archean Eon of the geologic record. It spans 431 million years, from the end of...

an informal unit of geologic time, subdivided into three eons (Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of...

A shield is a large area of exposed Precambrian crystalline igneous and high-grade metamorphic rocks that form tectonically stable areas. These rocks are...

Archean felsic volcanic rocks are felsic volcanic rocks that were formed in the Archean Eon (4 to 2.5 billion years ago). The term "felsic" means that...

MEE-zoh-ar-KEE-ən, MEZ-oh-, also spelled Mesoarchaean) is a geologic era in the Archean Eon, spanning 3,200 to 2,800 million years ago, which contains the first...

formation of the planet and ended 4.0 billion years ago. The following Archean and Proterozoic eons produced the beginnings of life on Earth and its earliest...

Post Archean (after 2.5 Ga) TTG rocks are present in arc-related batholiths, as well as in ophiolites (although of a small proportion), while Archean TTG...

called the Laurentia Craton), the Gawler craton in South Australia, the Archean Wyoming Craton, and the Superior Craton in Canada. Cratons have thick lithospheric...

NEE-oh-ar-KEE-ən; also spelled Neoarchaean) is the last geologic era in the Archean Eon that spans from 2800 to 2500 million years ago—the period being defined...

Vaalbara today Vaalbara is a hypothetical Archean supercontinent consisting of the Kaapvaal Craton (in present-day eastern South Africa) and the Pilbara...

planets of the Inner Solar System, i.e. Mercury, Venus, Earth (specifically Archean Earth) and Mars, as these planets typically are not massive enough for...

produced molecular oxygen (dioxygen or O2) started to accumulate in the Archean prebiotic atmosphere by microbial photosynthesis. It changed the atmosphere...

spelled Palaeoarchaean (formerly known as the early Archean), is a geologic era within the Archean Eon. The name derives from Greek "Palaios" ancient....

arc largely consists of Archean rocks of the Superior craton. In areal distribution, these rocks consist of about 60% Archean granitic plutons and granitic...

continents. The rock exposed in the oldest regions of shields, which is of Archean age (over 2500 million years old), mostly belong to granite-greenstone...

Animals Temporal range: Cryogenian – present, 665–0 Ma Pha. Proterozoic Archean Had. Scientific classification Domain: Eukaryota Clade: Podiata Clade:...

Archean Soundtrack are a British rock/hip hop band from London, England. It was formed by actors from the accredited East 15 Acting School in 2009. Archean...

South Africa contains some of the most widely accepted fossil evidence for Archean life. These cell-sized prokaryote fossils are seen in the Barberton fossil...

The Dharwar Craton is an Archean continental crust craton formed between 3.6 and 2.5 billion years ago (Ga), which is located in southern India and considered...

subdivisions of rocks constitute the stratigraphy of the mountain range, with the Archean Bhilwara Gneissic Complex basement being the lowest strata, followed by...

Wyoming Craton originated as a 100,000 km2 middle Archean craton that was modified by late Archean volcanic magmatism and plate movements and Proterozoic...

estimated to have occurred between 3.5 and 2.4 billion years ago during the Archean eon, prior to the Great Oxygenation Event and Huronian glaciation. Retinal-containing...

hydrothermal depositional environment and debated geochemical evidence. Most archean stromatolites older than 3.0 Ga are found in Australia or South Africa...

United States. It is the biggest craton among those formed during the Archean period. A craton is a large part of the Earth's crust that has been stable...

available geological reconstructions of 2.1–1.8 Ga orogens and related Archean cratonic blocks, especially on those reconstructions between South America...

ISSN 0723-2020. Olson, John M. (May 2006). "Photosynthesis in the Archean era". Photosynthesis Research. 88 (2): 109–117. Bibcode:2006PhoRe..88....

ancient continent of Western Gondwana, with rocks dating back to the early Archean Eon, possibly as early as 3.46 billion years ago (Ga.). The craton is named...

this comprises all of the Hadean eon and approximately one-third of the Archean eon, starting with the formation of the Earth about 4.6 Gya, and ended...

Complex, also called the Acasta Gneiss, is a body of felsic to ultramafic Archean basement rocks, gneisses, that form the northwestern edge of the Slave...

Kovaleva, E.; Rae, A. S. P.; Tisato, N.; Gulick, S. P. S. (August 2023). "Can Archean Impact Structures Be Discovered? A Case Study From Earth's Largest, Most...

are three tectonic units from the anticline core to the rim, including Archean to Paleoproterozoic metamorphic basement, Neoproterozoic to Jurassic sedimentary...

Block of North China Craton Geology of China Khondalite Greenstone Belt Archean subduction a.^Ga refers to billion years ago; Ma refers to million years...

rock records from both these cratons, especially of the overlying late Archean sequences, suggest that they were once part of the Vaalbara supercontinent...

and mark the start of the Archean Eon, which is defined to start with the formation of the oldest intact rocks on Earth. Archean rocks are exposed on Earth's...

The region is composed of Archean rocks (ca. 2.7–2.9 Ga) from the Douglas Harbour Domain (see Superior Craton). The Archean rocks are overlain by Paleoproterozoic...

tonalite–trondhjemite–granodiorite family of rocks, which are characteristic of Archean continental crust. Many of Canada's major ore deposits are associated with...

Printing Office, 1914), pp. 11–96 [32]. From p. 32: "Proterozoic Rocks. Archean System. Vishnu schist. Name." The name Vishnu terrane has been given by...

Antarctica covers the geological development of the continent through the Archean, Proterozoic and Phanerozoic eons. The geological study of Antarctica has...

Ramsay in 1898. Geologically, the area is distinct because its bedrock is Archean granite and gneiss with very little limestone, in contrast to adjacent...

that were initially deposited around 3 billion years ago, or during the Archean Eon. However, the zircon crystals there are older than the rocks that contain...

makes it a valuable resource in the understanding of the evolution of the Archean Earth. The Eastern Pilbara Craton is geologically significant due to its...

banded iron formations. The great majority of banded iron formations are Archean or Paleoproterozoic in age. However, a small number of BIFs are Neoproterozoic...

stretches from southern Saskatchewan and Alberta to northern Nunavut. The Archean (ca. 1.83 Ga) Western Churchill province contributes to the complicated...

the geologic time scale that make up the Earth's history, the Hadean, Archean, Proterozoic, and the current aeon, Phanerozoic. In astronomy, an aeon...

in its history. This is likely to have occurred between the Hadean and Archean eons in cataclysmic events such as the moon forming impact. Any water on...

and the Orange Free State, and consists of a 5000–7000 m thick layer of Archean, mainly sedimentary rocks laid down over a period of about 260 million...

square miles. This includes some of the oldest rock on Earth, such as the Archean rock of the Acasta Gneiss, which is 4.04 billion years (Ga) old, and the...

cyanobacteria cells. Dated between 3.53–3.427 Ga, these microstructures, found in Archean chert, are considered to be the oldest known geological record of life...

Aravalli Supergroup and Delhi Supergroup. These two supergroups rest over the Archean Bhilwara Gneissic Complex basement, which is a gneissic (high-grade metamorphism...

output than was predicted). In order to explain the warm conditions in the Archean eon, this mass loss must have occurred over an interval of about one billion...

concentrating there. Anorthosite on Earth can be divided into five types: Archean anorthosites Proterozoic anorthosite (also known as massif or massif-type...

formed by Proterozoic crustal accretion and the collision of pre-existing Archean continents. The event occurred 2.0–1.8 billion years ago. The Trans-Hudson...

includes the first three of the four eons of Earth's prehistory (the Hadean, Archean, and Proterozoic) and precedes the Phanerozoic eon. Major volcanic events...

association of three closely related rock types, found particularly in crust of Archean age Transmit/receive transition gap in communications TTG, a codon for...

and many older, now extinct, stratovolcanoes erupted lava as far back as Archean times. Stratovolcanoes are typically found in subduction zones but they...

at Pennsylvania State University where her dissertation topic was "Late Archean microbial ecology: an integration of molecular isotopic, and lithologic...

honor is repaired. Achilles begs his mother to avenge him by punishing the Archean soldiers who had wronged him and precipitate the Greeks' need for him;...

Palaeopascichnus Temporal range: late Ediacaran ~580–542 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Scientific classification Domain: Eukaryota (unranked):...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

Morton gneiss, also known as rainbow gneiss, is an Archean-age gneiss found in the Minnesota River Valley of southwestern Minnesota, United States. It...

Life Temporal range: 3770–0 Ma Pha. Proterozoic Archean Had. Archean – present (possible Hadean origin) Diverse forms of life on a coral reef Scientific...

universally Precambrian metamorphic and igneous basement rock, formed in the Archean as part of the Congo Craton and the Central African Mobile Zone and covered...

The Rae Craton is an Archean craton located in northern Canada, north of the Superior Craton. The Ungava Peninsula, situated on the northeast portion...

peat bogs are common. Belarus is situated on Cratons basement is made of Archean and early Proterozoic crystalline basement rocks and covered by terrigenous...

structure on Earth by over a billion years and the only one known from the Archean. The structure is found in the East Pilbara Terrane, one of the oldest...

and erosion resistant Archean rocks are either exposed at the surface or blanketed by Pleistocene glacial sediments. The Archean and Proterozoic strata...

2018-10-03. Sumner, Dawn Y.; Grotzinger, John P. (1996). "Were kinetics of Archean calcium carbonate precipitation related to oxygen concentration?". Geology...

Longfengshania Temporal range: Statherian–Early Cambrian Pha. Proterozoic Archean Had. Reconstruction of Longfengshania stipitata as an alga Scientific classification...

Rae Craton – Archean craton in northern Canada north of the Superior Craton (Canada) Sask Craton (Canada) Sclavia Craton – Late Archean supercraton (Canada)...

deep-mantle-plume method of continent formation in the Hadean to Early Archean (before the final formation of the Earth's inner core) to the subsequent...

Acritarchs are found in sedimentary rocks from the present back into the Archean. They are typically isolated from siliciclastic sedimentary rocks using...

anomaly are found worldwide. The Proterozoic (apart from the Ediacaran), Archean and Hadean are subdivided by absolute ages (Global Standard Stratigraphic...

Location of Archean and Proterozoic cratons in Australia...

most of Earth's history, oceans were largely oxygen-deficient. During the Archean, euxinia was largely absent because of low availability of sulfate in the...

none to up to 10% of the modern level. At the beginning of the preceding Archean eon, almost all existing lifeforms were single-cell prokaryotic anaerobic...

an initial rapid growth in the volume of continental crust during the Archean, forming the bulk of the continental crust that now exists, which is supported...

suggested that Earth potentially had a similar photochemical haze during the Archean eon, causing an anti-greenhouse effect that was counterbalanced by strong...

proto-atmosphere), whose composition resembled that of the solar nebula; the Archean second atmosphere or secondary atmosphere (also known as the prebiotic...

specialization. The Ukrainian Shield and the Voronezh Massif consist of 3.2-3.8 Ga Archean crust in the southwest and east, and 2.3-2.1 Ga Early Proterozoic orogenic...

supercratons, microcontinents, continents and supercontinents. For the Archean to Paleoproterozoic cores of most of the continents see also list of shields...

was Agnico Eagle’s first Low Arctic mine. Discoveries of gold-containing Archean greenstone in the Baker Lake region were made in the 1980s. Asamera Minerals...

Tuanshanzia Temporal range: Statherian–Calymmian Pha. Proterozoic Archean Had. Tuanshanzia linearis Scientific classification Domain: Eukaryota (unranked):...

Kudryavtsev, A.B., Czaja, A.D., and Tripathi, A.B. (2007). "Evidence of some Archean life: Stromatolites and microfossils". Precambrian Research, 158: 141–155...

suggested that the entire Archean crust may have been derived from the partial melting of subducted oceanic crust during the Archean (> 2.5 billion years ago)...

composed of Silurian deposits. The existing bedrock includes very ancient Archean gneiss, metamorphic beds interspersed with granite intrusions created during...

Ur is a hypothetical supercontinent that formed in the Archean eon around 3.1 billion years ago (Ga). In a reconstruction by Rogers, Ur is half a billion...

Hare Hills Tuff Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Lithology Primary Felsic volcanics...

GSSP/GSSA location Defining markers Geographic Coordinates References Archean Neoarchean 2800 - Defined chronometrically - - Mesoarchean 3200 - Defined...

Bangiomorpha Temporal range: 1047 Ma +13/–17 Ma Pha. Proterozoic Archean Had. Scientific classification Domain: Eukaryota Clade: Archaeplastida Division:...

pentose phosphate pathway, can occur in the oxygen-free conditions of the Archean oceans, also in the absence of enzymes, catalyzed by metal ions, meaning...

the Witwatersrand basin, which is a 5–7 km (3.1–4.3 mi) thick layer of archean rocks located, in most places, deep under the Free State, Gauteng and surrounding...

the Archean and Proterozoic eons, in some cases more than 2.5 billion years ago. Igneous and metamorphic crystalline basement rock forms the Archean Tanzania...

Shaanxilithes Temporal range: late Ediacaran ~550–543 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. A slab of Shaanxilithes ningqiangensis from the...

The Isua Greenstone Belt is an Archean greenstone belt in southwestern Greenland, aged between 3.7 and 3.8 billion years. The belt contains variably metamorphosed...

quickly on Earth ... then it could be common in the universe." c. 4,031 Ma – Archean Eon and Eoarchean Era start. Possible first appearance of plate tectonic...

Geologists. Archean Gold Deposits of the Matachewan-Kirkland Lake-Larder Lake Area, Ontario, Canada (Guidebook Series Vol. II): 9–10. Archean greenstone...

Rafatazmia Temporal range: Late Statherian, ~1600 Ma Pha. Proterozoic Archean Had. Reconstruction of Rafatzamia Scientific classification Domain: Eukaryota...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

later. (By contrast, during the much earlier "Purple Earth" phase of the Archean eon, primitive anoxygenic photosynthesis was performed mostly by archaeal...

Calymmian 1600 – 1400 Ma Pha. Proterozoic Archean Had. Paleoglobe of the Earth at the start of the Calymmian, c. 1590 Mya[citation needed] Chronology...

The Taltson magmatic zone (TMZ) is a north-trending belt of Archean to Paleoproterozoic granitic basement gneiss, amphibolite supracrustal gneissic rock...

East Antarctica is geologically varied. Its formation began during the Archean Eon (4,000 Ma–2,500 Ma), and stopped during the Cambrian Period. It is...

mostly of green fuchsite. This specimen (6.5 cm across at its base), of Archean age, is from Barberton, Mpumalanga, South Africa General Category Phyllosilicate...

ancient rock formed between 3.5 billion and 539 million years ago in the Archean and the Neoproterozoic, with some rocks from the past 145 million years...

Jakutophyton Temporal range: Mesoproterozoic Pha. Proterozoic Archean Had. Scientific classification Domain: Bacteria Phylum: Cyanobacteria Genus: †Jakutophyton...

Barasway Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Lithology Primary Hypabyssal...

Changchengia Temporal range: Statherian–Calymmian Pha. Proterozoic Archean Had. Reconstruction of Changchengia stipitata Scientific classification Domain:...

The geology of South Korea includes rocks dating to the Archean and two large massifs of metamorphic rock as the crystalline basement, overlain by thick...

Pectinifrons Temporal range: late Ediacaran ~565–550.78 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Life restoration of Pectinifrons abyssalis. Note...

Pakupaku Temporal range: Tonian Pha. Proterozoic Archean Had. Scientific classification Domain: Eukaryota (unranked): incertae sedis Genus: †Pakupaku...

400 km (870 mi) long, and separates the older Archean gneissic terrane to the south from younger Late Archean greenstone-granite terrane to the north. The...

rocks that have been faulted southward over continental crust composed of Archean granulites of the Indian Plate during the Cenozoic collision of India with...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

the hypabyssal and plutonic equivalents of basalt. During the Hadean, Archean, and early Proterozoic eons of Earth's history, the chemistry of erupted...

whole of Canada from the Arctic to the Great Lakes. The mafic dikes cut Archean and Proterozoic rocks, including those in the Athabasca Basin in Saskatchewan...

nearly three billion years ago in the Archean and the territory preserves some of the world's oldest rock units. Archean rocks dominate much of the territory's...

of Gotland. The oldest rocks in Sweden date to the Archean, more than 2.5 billion years ago. Archean crystalline basement rocks are restricted to a few...

also occur non-enzymatically under conditions that replicate those of the Archean ocean, and are catalyzed by metal ions, particularly ferrous ions (Fe(II))...

Proterozoic rift basin. To the west is the Archean Superior Craton. To the east are the rocks of the Archean Rae Craton. The sedimentary rocks and volcanics...

Aulozoon Temporal range: late Ediacaran ~567–555 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Body fossil imprints of Aulozoon and Phyllozoon (top)...

Cibola gneiss Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Road cut in the Cebola Gneiss, Tijeras Canyon, New Mexico, USA Type Pluton...

Tumbledown Formation Stratigraphic range: Ectasian Pha. Proterozoic Archean Had. Type Formation Underlies Hazel Formation Overlies Allamoore Formation...

island is formed from sedimentary rocks of Carboniferous to Quaternary age. Archean rocks occur from the northeast portion of the island down to the south...

ophiolites are usually called plagiogranites. Trondhjemites are common in Archean terranes, occurring in conjunction with tonalite and granodiorite as the...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Coleman; Kanik (2009). "Controls on development and diversity of Early Archean stromatolites". Proceedings of the National Academy of Sciences. 106 (24):...

Schopf, J. William; Packer, Bonnie M (1986). "Newly discovered early Archean (3.4–3.5 Ga Old) microorganisms from the Warrawoona Group of Western Australia"...

To the west it borders the Saharan Metacraton. Colors indicate the age of the rocks (Archean, Pre-Neoproterozoic, Mesoproterozoic, Neoproterozoic)....

PMID 31723181. S2CID 207986473. Schopf, J.; Packer, B. (3 July 1987). "Early Archean (3.3-billion to 3.5-billion-year-old) microfossils from Warrawoona Group...

rotation, slowing the Earth's rotation. 3.2 billion years ago, during the Archean, the solar day was only around 13 hours. The angular momentum, lost from...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

Gremiphyca Temporal range: Ediacaran ~635–551 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Scientific classification Domain: Eukaryota Clade: Archaeplastida...

Temporal range: Cambrian Stage 3 – present, 515–0 Ma Pha. Proterozoic Archean Had. (Possible Neoproterozoic record) Included are the yellow tube sponge...

Vadito Group Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Vadito Group schists in the Picuris Mountains Type Group Sub-units Big Rock...

Myxomitodes Temporal range: 1900 Ma Pha. Proterozoic Archean Had. Myxomitodes stirlingensis holotype from 1900 million year old Stirling Range Formation...

Virtually all of Ivory Coast is underlain by very ancient rocks from the Archean and the Paleoproterozoic that form part of the West African Craton, except...

The geology of Eswatini formed beginning 3.6 billion years ago, in the Archean Eon of the Precambrian. Eswatini is the only country entirely underlain...

Cryogenian 720 – 635 Ma Pha. Proterozoic Archean Had. A map of Earth as it may have appeared during the early Cryogenian, c. 690 Ma Chronology −720 —...

Canada, was an episode of mountain-building (orogeny) during the Late Archean Eon that involved repeated episodes of continental collisions, compressions...

Taylors Bay Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Lithology Primary Volcanics...

Ozarkcollenia Temporal range: 1500 Ma Pha. Proterozoic Archean Had. Scientific classification Domain: Bacteria Kingdom: Bacillati Phylum: Cyanobacteriota...

widely in the fossil record of the Precambrian but are rare today. Very few Archean stromatolites contain fossilized microbes, but fossilized microbes are...

intrusives such as gabbros. The oldest rocks in the shield consist of Archean Imataca Complex, composed of a quartz-feldspar gneiss and subordinate mafic...

Annulatubus Temporal range: late Ediacaran ~553–541 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Scientific classification Kingdom: Animalia (?)...

Ying; Li, Yiliang; Konhauser, Kurt O. (2021-11-16). "An abiotic source of Archean hydrogen peroxide and oxygen that pre-dates oxygenic photosynthesis". Nature...

Chaotian 4540 – 4404 Ma Pha. Proterozoic Archean Had. Chronology Subdivisions See text Usage information Celestial body Earth Regional usage Proposed...

The geology of Wyoming includes some of the oldest Archean rocks in North America, overlain by thick marine and terrestrial sediments formed during the...

settings. The term "sanukitoid" was originally used to define a variety of Archean plutonic rock, but now also includes younger rocks with similar geochemical...

source-rocks for the leuogranite were shallow midcrustal Proterozoic and Archean metapelites during the Trans-Hudson orogeny and dated to 1.715 ± 0.003Ga...

The mantle remained hotter than modern day temperatures throughout the Archean. Over time the Earth began to cool as planetary accretion slowed and heat...

Altiplano consists of a large granite block of gneiss and other crystalline Archean rocks, with underlying layers of sandstone and shale clay. The core of...

Abag Formation A’ershan Formation A’ertashi Formation A’ergong Formation Dabeigou Formation Jianxing Formation Jiufotang Formation Tuchengzi Formation...

Hapsidophyllas Temporal range: late Ediacaran ~579–565 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Paleoart by Max Endieveri modeled after Bamforth...

Earth', the International Union of Geological Sciences (IUGS) included the 'Archean zircons of Erawondoo Hill' in its assemblage of 100 'geological heritage...

of the Seminoe Reservoir and is known for its rugged terrain, ancient Archean rock formations, and historical mining activity. The name Seminoe is often...

range: late Cryogenian – early Ediacaran ~664.7–570 Ma Pha. Proterozoic Archean Had. Type Formation Unit of Upalinna Subgroup Sub-units See: Members Underlies...

Ectasian 1400 – 1200 Ma Pha. Proterozoic Archean Had. Map of Earth in the late Ectasian, c. 1260 Ma[citation needed] Chronology −1420 — – −1400 — – −1380 —...

Brazilian states of Minas Gerais and Bahia. It includes a number of blocks of Archean basement, separated by orogenic belts. The belts are characterized by sedimentary...

Bradgatia Temporal range: late Ediacaran ~575–550.78 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. A reconstruction of Bradgatia Scientific classification...

Obruchevella Temporal range: Mesoproterozoic–Cambrian Pha. Proterozoic Archean Had. Scientific classification Domain: Bacteria Kingdom: Bacillati Phylum:...

Tulaneia Temporal range: latest Ediacaran ~540–538.8 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Scientific classification Kingdom: Animalia Phylum:...

Tilt Hills Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Lithology Primary Mafic volcanics...

Island Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Burin Group Lithology Primary Marine mafic...

Primocandelabrum Temporal range: late Ediacaran ~574–550 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Reconstruction of Primocandelabrum Scientific classification...

Gondwana Research, 84, pp.131-150. Lindsay, J. F., 2007, Was There a Late Archean Biospheric Explosion? Astrobiology. vol. 8, pp. 823-839. Lanham, A., 2004...

S2CID 126954461. Catling, David C.; Zahnle, Kevin J. (February 26, 2020). "The Archean atmosphere". Science Advances. 6 (9) eaax1420. American Association for...

intruded into existing gneisses during the Archean at about 2.7 Ga. Host rocks on the northern side are Archean sedimentary rocks while the southern boundary...

Lopoliths typically consist of large layered intrusions that range in age from Archean to Eocene. Examples include the Duluth gabbro, the Sudbury igneous complex...

achritos 'uncertain' and arché 'origin') are organic microfossils, known from the Archean eon of the Precambrian to the present. The classification is a catch all...

Kakabekia Temporal range: Paleoproterozoic Pha. Proterozoic Archean Had. Scientific classification Domain: incertae sedis Genus: Kakabekia E.S. Barghoorn...

Archaic All pages with titles containing archaic Archaea, several meanings Archean, a geological eon This disambiguation page lists articles associated with...

Cycliomedusa Temporal range: late Ediacaran ~550–545 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Reconstruction of Cycliomedusa jiangchuanensis...

including the Slave Craton, Rae Craton and Hearne Craton. These rocks form the Archean and Proterozoic Precambrian basement rock of the region and are the subject...

Ourasphaira giraldae Temporal range: 1000 Ma Pha. Proterozoic Archean Had. Scientific classification Kingdom: Fungi (?) Genus: †Ourasphaira Species: †O...

Wyoming Craton originated as a 100,000 km2 middle Archean craton that was modified by late Archean volcanic magmatism and plate movements and Proterozoic...

that the magma of the Lava Creek Tuff was generated from a mix of mantle, Archean crust, and shallow hydrothermally altered intra-caldera rocks. Member A...

Geological map of the Scandinavian Peninsula and Fennoscandia:   Archean rocks of the Karelia, Belomorian, and Kola domains   Proterozoic rocks of the...

The Misema Caldera is a 2,704-2,707 million year old caldera in Ontario and Quebec, Canada. It is the caldera that forms the Blake River Megacaldera Complex...

Orosirian 2050 – 1800 Ma Pha. Proterozoic Archean Had. A map of Earth as it appeared during the early Orosirian, c. 2 Ga[citation needed] Chronology −2050 —...

The Cheyenne Belt is the tectonic suture zone between the Archean-age Wyoming craton to the north and the Paleoproterozoic-age Yavapai province to the...

Obamus Temporal range: late Ediacaran ~555 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. (Possible Tonian record) Artist's reconstruction Scientific...

Otavia Temporal range: Tonian – Ediacaran 720–570 Ma Pha. Proterozoic Archean Had. Life reconstruction of Otavia antiqua Fossil Scientific classification...

Gunflintia Temporal range: Proterozoic–Cambrian Pha. Proterozoic Archean Had. Scientific classification Domain: Bacteria Kingdom: Bacillati Phylum: Cyanobacteriota...

Ortega Formation Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Ortega Formation at its type section near Ancones, New Mexico Type Formation...

Hondo Group Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Hondo Group (Ortega Formation) in the Tusas Mountains, New Mexico Type Group...

Zimbabwe in southern Africa is centered on the Zimbabwe Craton, a core of Archean basement composed in the main of granitoids, schist and gneisses. It also...

more than 3 billion years old. In its central region it is composed of Archean crystalline schists and gneisses. Along the periphery of the plateau Proterozoic...

542 million years ago. The Precambrian can be split into two eons, the Archean and the Proterozoic, which can be further subdivided into eras. The reconstruction...

Rhyacian 2300 – 2050 Ma Pha. Proterozoic Archean Had. A sample of a Rhyacian banded iron formation found in North America Chronology −2300 — – −2250 —...

other molecular fossils, suggests the existence of archaea in the Late Archean sedimentary environments and in subsurface hydrothermal settings. Schouten...

Abajo Formation Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Abajo Formation in a road cut west of Abo Pass, New Mexico, US Type Formation...

underlying Hudson Bay, and in which the basin formed, is composed of two Archean proto-continents, the Western Churchill and Superior cratons. These cratons...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

035205. M. Pujol; B. Marty; P. Burnard; P. Philippot (2009). "Xenon in Archean barite: Weak decay of 130Ba, mass-dependent isotopic fractionation and...

Eastern Block and entered a period of instability. The rocks formed in the Archean and Paleoproterozoic eons (4.6–1.6 billion years ago) were significantly...

Payson ophiolite Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Underlies Tonto Basin Supergroup Overlies Larson Spring Formation Lithology...

presence of large bodies of water on the Earth's surface early in the Archean Eon. Pillow lavas are used generally to confirm subaqueous volcanism in...

ultra-high-temperature metamorphism in the area was finished by the end of the Archean. Effects of the metamorphism are mostly restricted to regions of retrogression...

Sculpin Point Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Burin Group Location Region Newfoundland Country...

Big Rock Formation Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Exposure of Big Rock Formation at Mesa la Jara, New Mexico Type Formation...

Grandy's Pond formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Long Cove Group Location Region Newfoundland...

exhibit sub-greenschist alteration. The greenstone belts of the various Archean cratons are commonly altered to the greenschist facies. These ancient rocks...

Thuchomyces (sometimes mistakenly called “Thucomyces”) is a genus of Archean fossils from the Witwatersrand of South Africa, and is the earliest macroscopic...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

with a correspondingly larger original volume. This volume overlies the Archean age Indian Shield, which is likely the lithology the province passed through...

Hindawi Archaic (disambiguation), an earlier or ancient period or practice Archean, or Archæan, an early geological eon "archaeo-" ('ancient'), a commonly...

Clonophycus Temporal range: Statherian-Ediacaran 1800–541 Ma Pha. Proterozoic Archean Had. Scientific classification Domain: incertae sedis Genus: †Clonophycus...

118.000 Parent range Stanovoy Highlands South Siberian System Geology Rock age(s) Early Archean and Proterozoic Rock type(s) Granite, metamorphic rock...

the idea that a bacterium first became an endosymbiont of an anaerobic archean and then fused with it to become one organism. If such endosymbiosis was...

PMID 21429931. Brocks JJ, Logan GA, Buick R, Summons RE (August 1999). "Archean molecular fossils and the early rise of eukaryotes". Science. 285 (5430):...

Conophyton Temporal range: Neoproterozoic Pha. Proterozoic Archean Had. Stromatolites, Neoproterozoic, 850 Ma in Australia Scientific classification Domain:...

Pedro quartz orthogneiss Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Outcrop of San Pedro quartz monzonite Type Pluton Lithology Primary...

Range South Siberian Mountains Geology Orogeny Alpine orogeny Rock age Archean - Proterozoic Rock type(s) Crystalline schist and gneiss with granite intrusions...

Trampas Group Stratigraphic range: Calymmian Pha. Proterozoic Archean Had. Trampas Group beds in Picuris Mountains Type Group Sub-units Piedra Lumbre...

the carbonatitic igneous activity through the Earth's history, from the Archean eon to the present. Nearly all carbonatite occurrences are intrusives or...

continental crust, estimated to be around 35 kilometres (22 mi) deep, reaching Archean rocks at the bottom. Numerous unexpected geophysical discoveries were made:...

evolved. Earth's deep time in the Proterozoic and deeper still in the Archean is only "recounted by microscopic fossils and subtle chemical signals."...

tonalitic-trondhjemitic crust in Fennoscandia, (3.1–2.9 Ga) Lopian orogeny – Archean orogeny – Formation of two different types of terrain compatible with plate...

Creston Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Location Region Newfoundland...

Moppin Complex Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Moppin Complex at the Iron Mountain reference section Type Complex Underlies...

Irving Formation Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Type Formation Underlies Vallecito Conglomerate Overlies Twilight Gneiss...

equivalent on Earth consists of most of the Mesoarchean and Neoarchean eras (Archean eon), Paleoproterozoic and Mesoproterozoic eras (Proterozoic eon).[not...

The New Senator Caldera is a large Archean caldera complex within the heart of the Blake River Megacaldera Complex, Quebec, Canada. It has a diameter...

hypolimnion is noteworthy for its possible similarity to oceans in the Archean and Paleoproterozoic Eons, before the Great Oxidation Event (GOE). The...

Strickland, Ariel (July 1, 2015). "Nano- and micro-geochronology in Hadean and Archean zircons by atom-probe tomography and SIMS: New tools for old minerals"...

has been suggested that Wilson cycles on Earth started about 3 Ga in the Archean Eon. The Wilson Cycle model was a key development in the theory of plate...

Pilbaria Temporal range: 2300–1700 Ma Pha. Proterozoic Archean Had. Scientific classification Domain: Bacteria Kingdom: Bacillati Phylum: Cyanobacteriota...

operated by the state of Wyoming. The rock is a large rounded monolith of Archean granite typical of the surrounding region and is an isolated peak at the...

has been used to explain the generation of continental crust during the Archean eon. At that time, the production of dacitic magma was more ubiquitous...

(BP is an abbreviation for "before present"). The older Proterozoic and Archean eons are also divided into eras. For periods in the history of the universe...

three billion years ago, encompassing some of the Hadean and much of the Archean on the Geologic time scale. Other scales assign the Swazian to parts of...

greenstone belt represents a fragment of a partially exposed synformal Archean greenstone belt within the Wyoming craton that was intruded by Cenozoic...

Formation Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Sais Quartzite at its type location near Abo Pass, New Mexico, US Type Formation...

Grandilingulata Temporal range: Calymmian, 1590 Ma Pha. Proterozoic Archean Had. Grandilingulata qianxiensis Scientific classification Domain: Eukaryota...

craton share late Archean and early Proterozoic tectono-thermal events, and may be considered to be a single terrain from the Archean until rifting in...

Mesozoic and onwards) sedimentary rock within a large, otherwise ancient (Archean-aged) piece of exposed continental crust. The deformation of the craton...

caves, and waterfalls. There are geological layers spanning from the Archean eon to Cenozoic, with important fossil finds. Furthermore, there are archaeological...

Neoproterozoic 1000 – 538.8 ± 0.6 Ma Pha. Proterozoic Archean Had. Clockwise, from top left: Otavia, a multicellular organism from Tonian period, Snowball...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

of Paleozoic, Mesozoic and Cenozoic sedimentary rocks overlying ancient Archean and Proterozoic crystalline basement rock. Eastern Montana has considerable...

particularly the northern shore of the St. Lawrence formed beginning in the Archean, more than 2.5 billion years ago. Geologists subdivide the Grenville Province...

huge asteroids during the Late Heavy Bombardment, created the subsequent Archean atmosphere, which consisted largely of nitrogen plus carbon dioxide, methane...

belt, also called the Hope Bay volcanic belt, is a 42 km (26 mi) long Archean greenstone belt in western portion of Kivalliq Region, Nunavut, Canada...

Mazatzal Group Stratigraphic range: Statherian Pha. Proterozoic Archean Had. Mazatzal Group underlies the Four Peaks, Mazatzal Mountains, Arizona, US...

Creation A Tribe Called Quest Anticon Antipop Consortium Arabian Knightz Archean Soundtrack Arkatech Beatz Armand Hammer Army of the Pharaohs Arrested Development...

Madagascar and the Kaapvaal and Zimbabwe cratons of Southern Africa, in the Archean Eon to form Ur, one of the oldest supercontinents on Earth (3–3.2  billion...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

levels, eventually heat the Earth toward temperatures not seen since the Archean Eon 3 billion years ago (before the first plants and animals appeared)...

Mobile Lithosphere of Venus May Resemble the Permobile Tectonic Regime of Archean Earth. GSA Annual Meeting 2018. Geological Society of America Abstracts...

history. Some authors have suggested that during at least part of the Archean period (~4-2.5 billion years ago) the mantle was between 100 and 250 °C...

early Palaeozoic eras to form the African continent. It consists of two Archean centers juxtaposed against multiple Paleoproterozoic domains made of greenstone...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

Retrieved on 2007-07-20 CAT.INIST - Sturgeon Lake Caldera Complex Oxygen Isotope Studies of the Archean Sturgeon Lake Caldera Complex, Northern Ontario...

cited. The Hesperian Period is roughly coincident with the Earth's early Archean Eon. With the decline of heavy impacts at the end of the Noachian, volcanism...

mean dyke thickness is 17 metres (56 ft). The dyke swarm cuts through Archean basement rock to the west in Shashe area, and Jurassic volcanic rocks and...

evolution', the International Union of Geological Sciences (IUGS) included the 'Archean Rocks of the Eastern Beartooth Mountains' in its assemblage of 100 'geological...

Permian Stratigraphy. 10. Utrecht: 443–456. Bleeker, W. (2003). "The late Archean record: a puzzle in ca. 35 pieces" (PDF). Lithos. 71 (2–4): 99–134. Bibcode:2003Litho...

Petri; Slabunov, Alexander; Sorjonen-Ward, Peter; Whitehouse, Martin (2008). "Archean of Greenland and Fennoscandia". Episodes. 31 (1): 13–19. v t e...

10725 Sukunabikona derives its name from the kami. Sukunaarchaeum is an Archean parasite that is provisionally named for the deity. Handbook of Japanese...

It is commonly oolitic. Greenalite, which is common in Archean rocks, formed rapidly in Archean seawater removing zinc, copper and vanadium in the process...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

amount of granitic melt. The Limpopo Central Zone shows relics of late Archean high grade metamorphism. In the Northern (NMZ) and Southern Marginal Zones...

Stratigraphic range: Paleoproterozoic, between 1820 and 1770 Ma Pha. Proterozoic Archean Had. Mingus Mountain is underlain by the Yavapai Supergroup Type Supergroup...

Joaquin quartz monzonite Stratigraphic range: Calymmian Pha. Proterozoic Archean Had. Exposure of Joaquin quartz monzonite in road cut Type Pluton Lithology...

Blue Springs Formation Stratigraphic range: Calymmian Pha. Proterozoic Archean Had. Type Formation Unit of Manzano Group Overlies Sais Quartzite Thickness...

June 2016. Schopf, J. William; Packer, Bonnie M. (3 July 1987). "Early Archean (3.3-Billion to 3.5-Billion-Year-Old) Microfossils from Warrawoona Group...

(2000) Vestiges of life in the oldest Greenland rocks? A review of early Archean geology in the Godthåbsfjord region, and reappraisal of field evidence...

Collenia Temporal range: Siderian–Rhyacian 2400–2100 Ma Pha. Proterozoic Archean Had. Section of Collenia undosa stromatolite from 2110 million year old...

The West African early Proterozoic greenstone belts are similar to the Archean greenstone belts. These similarities include a decrease in the amount of...

geologic time. Paleosols have been identified in formations as old as Archean (over 2.5 billion years in age). They are difficult to recognize in the...

Nelson, D.R. and Pike, G., 2002. Geology and tectonicevolution of the Archean North Pilbara terrain, Pilbara Craton, Western Australia. Economic Geology...

Sinosabellidites Temporal range: Tonian Pha. Proterozoic Archean Had. Scientific classification Domain: Eukaryota Clade: Archaeplastida Order: †Sinosabelliditida...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

Normetal caldera is an Archean volcano in the Abitibi-Témiscamingue region of western Quebec, Canada. It is one of seven Archean calderas forming an alignment...

Nd evolution vs. time diagram, DePaolo and Wasserburg determined that Archean rocks had initial Nd isotope ratios very similar to that defined by the...

Alder Group Stratigraphic range: 1720–1700 Ma Pha. Proterozoic Archean Had. Type Group Unit of Tonto Basin Supergroup Sub-units Board Canyon Formation...

Grand Bank Sequence Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Lithology Primary Sandstones...

Sar Temporal range: 736–0 Ma Pha. Proterozoic Archean Had. Scientific classification Domain: Eukaryota Clade: Diaphoretickes Clade?: TSAR Clade: Sar Burki...

metasomatised mantle. Similar Archean intrusive rocks, called sanukitoids, have been reported in the rocks of several early cratons. Archean boninite lavas are also...

Ediacaran 635 – 538.8 ± 0.6 Ma Pha. Proterozoic Archean Had. A map of Earth as it appeared during the mid-Ediacaran, c. 600 Ma Chronology −640 — – −630 —...

Czaja, Andrew D.; Tripathi, Abhishek B. (October 5, 2007). "Evidence of Archean life: Stromatolites and microfossils". Precambrian Research. 158 (3–4):...

in the early history of life on the Earth, e.g., Proterozoic burrows, Archean microborings and stromatolites. Two major ichnofossil-like structures have...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

sedimentary rocks with an area of 225 km2, enclosed within much older Archean rocks of the Yilgarn craton, near the town of Collie in southwestern Western...

Retrieved on 18 November 2011. Pearson, V.; Daigneault, R. (January 2009). "An Archean megacaldera complex: The Blake River Group, Abitibi greenstone belt". Precambrian...

zone between the Hearne craton and Wyoming craton basement rock of the Archean Eon which form part of the North American continent. The zone is an area...

plate tectonics may have occurred 3.2–2.3 billion years ago during the Archean epoch. A lid tectonic regime arises when the cold upper lithosphere is...

represents a meeting point in the geological history of the Earth where Archean gneisses formed over 2.5 billion years ago meet sedimentary rocks of the...

materials such as coal and crude oils.  She focuses especially on the Archean continental crust in Wyoming, where she is looking at what she describes...

rocks of Paleozoic and Mesozoic age draped above cores of Proterozoic and Archean igneous and metamorphic rocks ranging in age from 1.2 billion (e.g., Tetons)...

intrusions associated with felsic and mafic metavolcanic rocks in the northern Archean Temagami Greenstone Belt. Five magmatic cycles have been identified in...

still unknown about crustal forming processes in the Hadean and early Archean. Xenocrysts found within 3.94 Ga tonalitic gneisses of the Acasta Gneiss...

Stenian 1200 – 1000 Ma Pha. Proterozoic Archean Had. A map of Proto-Rodinia on 1040 mya showing a possible reconstruction of the time Chronology −1220 —...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

continents. The rock exposed in the oldest regions of shields, which is of Archean age (over 2500 million years old), mostly belong to granite-greenstone...

Schmincke 2003, pp. 128–132. Arndt, N.T. (1994). "Archean komatiites". In Condie, K.C. (ed.). Archean Crustal Evolution. Amsterdam: Elsevier. p. 19....

The geology of Nigeria formed beginning in the Archean and Proterozoic eons of the Precambrian. The country forms the Nigerian Province and more than...

and the Sahara Desert mountains. The mountain ranges date from the Late Archean to the Alpine periods. This geological structure is dictated by the convergence...

terrane (north of the Hottah Lake), a continental magmatic arc, and the Archean Slave Craton at about 1.88 Ga (billion years). The collision led to the...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

the Ukrainian Shield and formed more than 2.5 billion years ago in the Archean eon of the Precambrian. Extensive tectonic evolution and numerous orogeny...

1029/1999gl900391. S2CID 129742780. Gsa.confex.com: "Oceanic Plateaus: Nuclei for Archean Cratons" Archived 2012-02-06 at the Wayback Machine Tristan.ferroir.free...

where there is a gap of hundreds of million of years between the older Archean and younger Proterozoic rocks. One of the formations in the area is the...

the Animikie Group. Before the Rove sediments were laid down, during the Archean Eon, the Algoman orogeny added landmass along a border from South Dakota...

dinosaurs and memorised Earth's primary geologic development periods, from the Archean up to the Cenozoic. In the fourth and fifth grades he demonstrated interest...

Schmincke 2003, pp. 128–132. Arndt, N.T. (1994). "Archean komatiites". In Condie, K.C. (ed.). Archean Crustal Evolution. Amsterdam: Elsevier. p. 19....

age, like those formed by the closure of the Tethys Ocean. Ophiolites in Archean and Paleoproterozoic domains are rare. Most ophiolites can be divided into...

Czaja, Andrew D.; Tripathi, Abhishek B. (5 October 2007). "Evidence of Archean life: Stromatolites and microfossils". Precambrian Research. Earliest Evidence...

Riphean 1600 – 600 Ma Pha. Proterozoic Archean Had. Usage information Celestial body Earth Regional usage Regional Time scale(s) used Siberian Used by...

Temporal range: Statherian to Cambrian Stage 3, 1632–518 Ma Pha. Proterozoic Archean Had. Fossil specimen, Geological Museum of China Scientific classification...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Group Stratigraphic range: Neoproterozoic, 782 to 739 Ma Pha. Proterozoic Archean Had. Type Geological formation Unit of Grand Canyon Supergroup Sub-units...

purple conglomerates in the northwest of France: Precambrian, Cambrian, Archean] (in French). Lagny: F. Aureau. 1887, 1886. Histoire de la ville de Saint-Lô...

Hackspacher, Elton Luizdantas, and William Randall Van Schmus. (1998) "Archean Accretion in the Sao Jose do Campestre Massif, Borborema Province, Northeast...

that it was located west of the abandoned Sherman Mine and lies in the Archean Temagami Greenstone Belt. A number of volcanic features have been found...

prokaryotic microbial mats) started in the ocean floor during the earlier Archean eon. The Proterozoic–Phanerozoic boundary is at 538.8 million years ago...

the geological history of the Earth, where gneisses formed during the Archean eon (4031 to 2500 Mya meet the sedimentary rocks of the Proterozoic eon...

Southern and Grenville. The Superior Craton or Superior Province is an Archean craton. It is a 260 kilometer or 160 mile thick section of stable continental...

Twitya Formation Stratigraphic range: Cryogenian 662.4 Ma Pha. Proterozoic Archean Had. Type Formation Unit of Hay Creek Group Underlies Keele Formation Overlies...

formation Unit of Ariyalur Group Underlies Niniyur Formation Overlies Archean Basement Thickness Variable, typically 5–5,000 km (3.1–3,106.9 mi) Lithology...

(SGT) or Pandyan Mobile Belt. This geologic province represents an area of Archean rocks that were deeply buried during the neoproterozoic Pan-African Orogeny...

Compositionally, these rocks are typical of the basal volcanic members in other Archean terranes, and represent high-magnesian, sub-marine flows and sills. Felsic...

paleomagnetic information. The Belt Supergroup was deposited unconformably on Archean and Paleoproterozoic rocks. It reaches thicknesses of more than 15 kilometres...

God Point Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Location Region Newfoundland...

Lamaline Basalts Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Lithology Primary Mafic volcanics...

; Houlé, Michel G.; Lesher, C. Michael (2015). "Mode of emplacement of Archean komatiitic tuffs and flows in the Selkirk Bay area, Melville Peninsula...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Selbaie caldera is an Archean volcano in the Abitibi-Témiscamingue region of western Quebec, Canada. It is the northernmost of seven Archean calderas forming...

Swift Current Gabbro Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Swift Current Intrusive Suite Lithology Primary...

Xenotime can be found in geological formations that formed from the mid-Archean age to the Mesozoic age, so geological dating using xenotime in sedimentary...

feature shaped as a ring of 810 km (500 mi) diameter, rock features of Late Archean and Proterozoic periods in the central part of the anomaly, granulites...

not generate oxygen. Available evidence from geobiological studies of Archean (>2500 Ma) sedimentary rocks indicates that life existed 3500 Ma, but the...

coastal wetlands. The lower basin of the Penna is largely made up of ancient Archean rocks, principally granite and schist. The lower basin is made up of young...

Ediacaran-present; probable Cryogenian record, 544 –0 Ma Pha. Proterozoic Archean Had. Included are the yellow tube sponge, Aplysina fistularis, the purple...

sandstones with some volcanics, crosses indicate the Nanambu Complex of Archean granites and gneisses, and the unmarked outlined region indicates the Cahill...

intense impact occurred at 4.1 to 3.8 Gya during the Hadean and early Archean eons. Originally it was thought that the Late Heavy Bombardment was a single...

Cenozoic, although fossilized soils are preserved from as far back as the Archean. Collectively, the Earth's body of soil is called the pedosphere. The pedosphere...

5. "Zircon" 2:07 6. "Plume Of Ash" 2:18 7. "Magma Oscillator" 6:15 8. "Archean" 4:24 9. "First Life" 2:02 10. "Plate Tectonic" 2:31 11. "Chronozone" 2:33...

summoning devices called Infinity Watches, that summon Metalions and with Archean Stones can temporarily upgrade and combine them "Hyundai Motor to produce...

Lookout Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Lithology Primary Felsic volcanics...

Geological map of Fennoscandia.   Archean rocks of the Karelia, Belomorian and Kola domains   Proterozoic rocks of the Karelia and Kola domains   Svecofennian...

Narryer Gneiss Terrane Stratigraphic range: Archean >3.3 Ga Satellite image of the Jack Hills in the Narryer Gneiss Terrane Type Geological complex Sub-units...

universities of Bonn, Zürich, and Göttingen culminated in a Ph.D on "Post-Archean Tectonics in Southern Central Sweden". In 1935 he emigrated along with...

Proceeding the Archean, the next episode of orogenic gold deposit formation was from 2.1 to 1.8 Ga following the breakup of an Archean supercontinent...

scientist at NASA Goddard Space Flight Center, who specializes in exoplanets, Archean geochemistry, planetary atmospheres, and astrobiology. Domagal-Goldman...

the hills along the western shore of Potato Island in September 1993 by Archean Inc., a prospecting firm hired by Diamond Fields Resources Directors Jean-Raymond...

Bicellum Temporal range: 1000 Ma Pha. Proterozoic Archean Had. Multiple specimens of B. brasieri, such as the holotype (A) Scientific classification Domain:...

Lynn (1992). Symbiosis in Cell Evolution: Microbial Communities in the Archean and Proterozoic Eons, W.H. Freeman, ISBN 0-7167-7028-8 Sagan, Dorion, and...

range: Middle Calymmian – Late Ediacaran ~1480–550 Ma Pha. Proterozoic Archean Had. Paleoprot. Mesoprot. Neoprot. The holotype fossil of Horodyskia moniliformis...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

territory of Puna de Atacama, which may have similarities to Earth during the Archean eon and thus to the environment of the first life forms on Earth. It could...

article regarding depositional setting and structural evolution of the Archean Perseverance volcanogenic massive sulfide deposit in Quebec. He explained...

and aplitic rapakivi granite. Rapakivi granites have formation ages from Archean to recent and are usually attributed to anorogenic tectonic settings. They...

megatsunamis, and global climate change. 2.4×1010 >28 ZWh The impact energy of Archean asteroids. 9.1×1010 106 ZWh The total energy output of the Sun per second...

and Sm–Nd systematics for the Great Dyke, Zimbabwe—constraints on late Archean events in the Zimbabwe craton and Limpopo belt". Precambrian Research....

Available evidence from geobiological studies of sedimentary rocks from the Archean eon, more than 2.5Gy ago, suggests that life existed at 3.5Gy. Fossils...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

geochronology by ion microprobe, with an application to in situ dating of an Archean metasedimentary rock". Chemical Geology. What are we dating? Understanding...

Society of America Bulletin. 117(11–12):1573–1595. Sharp, RP (1940) Ep-Archean and Ep-Algonkian erosion surfaces, Grand Canyon, Arizona. Geological Society...

in its history. This is likely to have occurred between the Hadean and Archean eons in cataclysmic events such as the moon forming impact. Any water on...

northwestern Russia and the northern Baltic Sea. It is composed mostly of Archean and Proterozoic gneisses and greenstone which have undergone numerous deformations...

Michael; Johnson, Tim; Gardiner, Nicholas J. (2020). "Plate Tectonics and the Archean Earth". Annual Review of Earth and Planetary Sciences. 48: 291–320. Bibcode:2020AREPS...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Nain, Labrador, Canada. These two blocks appear to represent two distinct Archean cratonic nuclei, each with its own mineral depositional history. Major...

Africa, near South Africa's border with Eswatini, in what was then an Archean ocean that covered most of the planet, creating a crater about 500 kilometres...

rock and an intrusive mass of various origins that were formed in the Archean Era 1700-2000 million years ago. Subsequently, in the Proterozoic Era,...

there are four main types of geological formations in Karnataka: The Archean complex made up of Dharwad schists and granitic gneisses: These cover around...

Qingshania Temporal range: 1640–1590 Ma Pha. Proterozoic Archean Had. Scientific classification Domain: Eukaryota (unranked): incertae sedis Genus: †Qingshania...

Confidence Confirmed Diameter 30–70 km (19–43 mi) Age 2229 Ma Pha. Proterozoic Archean Had. ± 5 Ma Rhyacian, Paleoproterozoic Exposed Yes Drilled No...

QAPF diagram List of minerals List of rock types Bowen's reaction series Archean felsic volcanic rocks Marshak, Stephen, 2009, Essentials of Geology, W...

waters of the river are naturally saline. The river drains an area of Archean volcanic and sedimentary rock that is mostly vegetated. The area to the...

The Sclavia Craton is a late Archean supercraton thought to be parental to the Slave and Wyoming Cratons in North America, the Dharwar Craton in southern...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Neoproterozoic, continental crust which had come into existence in the Archean nearly 2.5 billion years had already experienced up to eight supercontinent...

and LIU, Dunyi, JACK HILLS METACONGLOMERATE: EVIDENCE OF EARLY AND LATE ARCHEAN HYDROSPHERE, The Geological Society of America, 2002 Denver Annual Meeting...

Saar district in Germany. Alkaline rocks such as trachyte are rare in the Archean, but become common in the Proterozoic. Alkaline rocks with an age close...

overriding plates. Mainstream literature on Earth's Precambrian geology—the Archean (4.0-2.5 b.y. ago), and Proterozoic (2.5-0.54 b.y.) eons—has been dominated...

Bonnie M. Packer, he reported the discovery of microfossils from the Early Archean Apex Basalt and Towers Formation of northwestern Western Australia. He...

one kilometre (3,300 ft) in thickness. While most layered intrusions are Archean to Proterozoic in age (for example, the Paleoproterozoic Bushveld complex)...

Archaeplastida Temporal range: Calymmian – Present Pha. Proterozoic Archean Had. Conifer trees, grasses, algae, and shrubs in and around Sprague River...

the Holocene epoch. Precambrian Hadean (or hadaeozoic[citation needed]) Archean (or archaeozoic) Eoarchean Paleoarchean Mesoarchean Neoarchean Proterozoic...

(1986), Stratigraphy, sedimentology, and sedimentary petrology of the early Archean Coongan formation, Warrawoona Group, Eastern Pilbara Block, western Australia...

regularly travel to the range. The Byam Martin Mountains are made up of Archean-Aphebian igneous crystalline rock and Proterozoic metasedimentary and metamorphic...

PMID 24553238. S2CID 4443958. Catling DC, Zahnle KJ (February 2020). "The Archean atmosphere". Science Advances. 6 (9) eaax1420. Bibcode:2020SciA....6.1420C...

geodiversity that represents geological-geomorphological processes from the Archean to the Quaternary. However, the acknowledgement of the continent's geodiversity...

the tip of Lapland's northwestern arm. With few exceptions rocks are of Archean and Proterozoic age. Granites, gneiss, metasediments and metavolcanics...

The Blake River Megacaldera Complex is a giant subaqueous caldera cluster or a nested caldera system that spans across the Ontario–Quebec border in Canada...

between 3,000,500,000 BCE and 1009 BCE. Earth forms in the Hadean and Archean periods, the area alternates between marsh and rocky terrain, and dinosaurs...

even older rocks are believed to exist in the park. Formed during the Archean Eon (4 to 2.5 billion years ago), these metamorphic rocks include gneiss...

Baltybaev identifies a narrow zone of conjugation with Archean complexes between the outer zone and the Archean craton to the north and east. Nironen and Mänttäri...

J. R. Structure and Metamorphism of the Aphebian Penrhyn Group and Its Archean Basement Complex in the Lyon Inlet Area, Melville Peninsula, District of...

pre-Garzón 1800 Tapajós orogeny Mitú (1800) 1950 Transamazonic orogeny pre-Mitú 2200 Columbia 2530 Archean Carajas-Imataca orogeny 3100 Kenorland Sources...

of the Napier Complex (including Mount Elkins) have been dated to the Archean Eon. Radiometrically dated to as old as 3.8 billion years, some of the...

enough to be met during Archean eon, which means the mass-fractionated hydrodynamic escape of Xe can persist during Archean. Albarède, F. (2011). Hydrodynamic...

Holozoans Temporal range: Early Tonian - Present Pha. Proterozoic Archean Had. Holozoan diversity. From top left corner: Capsaspora (Filasterea), Sphaeroforma...

continental terranes to the Mesozoic rifting of the Hartford Basin. In the Archean Eon Western Massachusetts and Vermont were the eastern edge of Laurentia...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

now Australia between 2.63 and 1.16 billion years ago, during the late Archean and Proterozoic. Tectonic history developed from isotope dating suggests...

Eva B. Kisvarsanyi and G. B. Morey, 1987, Geology and Metallogeny of Archean and Proterozoic Basement Terranes in the Northern Midcontinent, U.S.A....

discovered nearby Kapanga deposit is described as, a giant pegmatite dike of Archean age with substantial Li-Sn-Ta mineralization, including half the world’s...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

gneisses. The blocks in the northern part of the island are made up of Archean cratonic material. The Antongil block has been linked with the Dharwar...

may have been derived from an ancestral archaean prokaryote cell. The archean prokaryote cell concept is often termed as the endosymbiotic theory. There...

Mountains Geography Location Karnataka, Kerala, Tamil Nadu Parent range Western Ghats Geology Rock age(s) Archean Eon, 3000 to 500 mya Mountain type Fault...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

Jochen J.; Logan, Graham A.; Buick, Roger; Summons, Roger E. (1999). "Archean Molecular Fossils and the Early Rise of Eukaryotes". Science. 285 (5430):...

margins of the North China-Korea platform underlaid by three blocks of Archean age; the Nangrim-Pyeongnam Block, the Gyeonggi and Yeongnam Massifs which...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

are largely composed of granitic rock of the Oligocene Almo pluton and Archean Green Creek Complex. City of Rocks is also a popular rock climbing area...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

the suture zones that they create. The smaller land masses were made of Archean crust and belts of Early Proterozoic island arcs. Laurentia has been a...

Uncus dzaugisi Temporal range: late Ediacaran ~560–550 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. Artist's interpretation of U. dzaugisi Scientific...

Eukaryotic cells first evolved from archaea some time during the late Archean eon (ca. 3 billion years ago), forming a lineage that eventually gave rise...

examples exhibit the spinifex texture.[2] They are largely restricted to the Archean. In contrast, picrites are magnesium-rich because crystals of olivine have...

from Harvard University in 1977 for a dissertation titled "Studies in Archean and Early Proterozoic Paleontology." Knoll taught at Oberlin College for...

of the Napier complex (including Mount Elkins) have been dated to the Archean. Radiometrically dated to as old as 3.8 billion years, some of the zircons...

Retrieved 11 August 2018. Zeh, A.; Gerdes, A.; Barton Jr, J. M. (2009). "Archean accretion and crustal evolution of the Kalahari Craton—the zircon age and...

metals essential for electronic components. Hydrothermal venting on the Archean seafloor is considered to have formed Algoma-type banded iron formations...

long (in E. coli) component of the large subunit (50S) of the bacterial/archean ribosome and makes up the peptidyl transferase center (PTC). The 23S rRNA...

D.F. (1991). "Macassa Mine Geology". Society of Economic Geologists. Archean Gold Deposits of the Matachewan-Kirkland Lake-Larder Lake Area, Ontario...

Vent polymerase is a archean thermostable DNA polymerase used for the polymerase chain reaction. It was isolated from the thermophile Thermococcus litoralis...

Path End Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Burin Group Lithology Primary Mafic volcanics...

zircons, which are looked for when analyzing major geological events. The Archean rocks from the Pilbara craton contain some of the first evidence of life...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

Angadipuram Laterite has gained recognition as a National Geo-heritage Monument. Archean Gneiss is the most seen geological formation of the district. Quartz magnetite...

The Guriense orogeny was a mountain building event in the Archean 2.8 to 2.7 billion years ago, preserved in the Guyana Shield rocks of Venezuela, Guyana...

located near the island's centre. The Byam Martin Mountains are made up of Archean-Aphebian igneous crystalline rock and Proterozoic metasedimentary and metamorphic...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

James D.; Hudak, George J.; Wittkop, Chad; McLaughlin, Patrick I. (eds.), Archean to Anthropocene: Field Guides to the Geology of the Mid-Continent of North...

The geology of Western Sahara includes rock units dating back to the Archean more than two billion years old, although deposits of phosphorus formed in...

photosynthesis uses both type I and type II reaction centers. During the Archean Era on Earth, the atmosphere lacked or was limited in oxygen, was highly...

W.; Walter, M. R. (June 1983). "Filamentous fossil bacteria from the Archean of Western Australia". Precambrian Research. 20 (2–4): 357–374. Bibcode:1983PreR...

about 300 million years ago. The limestone and older sediments rest on Archean metamorphic rock consisting of gneiss and schists. The gneiss is exposed...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

Arcellinida Temporal range: Tonian–Present Pha. Proterozoic Archean Had. The shell (test) of Netzelia corona Scientific classification Domain: Eukaryota...

life forms evolved as anaerobic prokaryotes (archaea and bacteria) in the Archean oceans around the deep sea hydrothermal vents, before photoautotrophs appeared...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

capable[clarification needed] large igneous provinces in Eastern Canada are Archean (3,800-2,500 million years ago) age greenstone belts containing a rare...

blankets of fine-grained boulder-clay till. The boulder include rocks of Archean age transported from far-away regions of Fennoscandia. Where the till blanket...

could be ruled out (analogous to a clear Venus, early Mars, Titan and Archean Earth). This leaves two main possibilities consistent with the data: either...

Noranda may refer to: Noranda (mining company) Noranda Caldera, an Archean caldera in Canada Noranda, Western Australia, a suburb of Perth Noranda, Quebec...

by the 2000s. The station contains a sculpture by George Trakas, Hook (Archean Reach), Line (Sea House), and Sinker (Mined Swell), which was commissioned...

freshwater or terrestrial environment, and first appeared in the middle Archean eon. They are probably the most numerous taxon to have ever existed on...

bordering areas that suffered the regeneration at the Neoproterozoic. The archean rocks members of Belo Horizonte complex and supracrustal sequences of the...

Arthropods Molluscs Flowers Dinosaurs   Mammals Birds Primates Hadean Archean Proterozoic Phanerozoic     ← Earth formed ← Earliest water ← LUCA ← Earliest...

geodiversity that represents geological-geomorphological processes from the Archean to the Quaternary. However, the acknowledgement of the continent's geodiversity...

pre-Garzón 1800 Tapajós orogeny Mitú (1800) 1950 Transamazonic orogeny pre-Mitú 2200 Columbia 2530 Archean Carajas-Imataca orogeny 3100 Kenorland Sources...

and Ndala deposits. It is in the Moto greenstone belt, which contains Archean volcano-sedimentary, pyroclastic and basaltic rocks, with mafic and felsic...

Garbe-Schönberg, D.; Krasheninnikov, S. P. (2016). "Komatiites reveal an Archean hydrous deep-mantle reservoir". Nature. 531 (7596): 628–632. doi:10.1038/nature17152...

Laure (March 2021). "Stirred not shaken; critical evaluation of a proposed Archean meteorite impact in West Greenland". Earth and Planetary Science Letters...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

(in Geological terms) 1 Neetiya Yuga Kroni Narayana Bindu Late Hadean, Archean, Proterozoic eons Cambrian Explosion ** 2 Chathura Yukam Kundomasali Mayon...

(19 September 2013). "Nitrogen Isotopic Composition and Density of the Archean Atmosphere". Science. 342 (6154): 101–104. arXiv:1405.6337. Bibcode:2013Sci...

Zn-tetrapyrroles. The first autotrophic organisms likely evolved early in the Archean but proliferated across Earth's Great Oxidation Event with an increase...

Tonian 1000 – ~720 Ma Pha. Proterozoic Archean Had. A map of Earth as it appeared during the late Tonian, c. 750 Ma Chronology −1000 — – −950 — – −900 —...

of the Boulder Batholith. This Late Cretaceous granitic body intrudes Archean gneisses and schists. Significant gold deposits appear to be related to...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

from melt. Troctolite is found in some layered intrusions such as in the Archean Windimurra intrusion of Western Australia, the Voisey's Bay nickel-copper-cobalt...

the western (Kursk), characterized by the predominant distribution of Archean rocks, among which Lower Proterozoic deposits are observed only in narrow...

Obazoa Temporal range: Late Stenian - Present, 1010–0 Ma Pha. Proterozoic Archean Had. Clockwise, from top left: Abeoforma whisleri (Ichthyosporea); Amanita...

Western Australia, containing sub-groups and formations ranging from the Archean, into the Siderian, and possibly into the Rhyacian. Some groups and formations...

large deposits of gold, diamonds, coltan and other valuable minerals. Archean terranes in the Congo Craton are exposed as part of the Angolan Shield...

Lava(s) Stratigraphic range: Mesoproterozoic, 1,104 Ma Pha. Proterozoic Archean Had. black-Cardenas Basalt cliffs on the Colorado River. The squarish cliff...

Geologically, the district is mainly covered by Chhota Nagpur granite gneiss of Archean age with patches of alluvium, sandstone, and shale of Gondwana formations...

igneous province. Matachewan hotspot Petrogenesis of basalts from the Archean Matachewan Dike Swarm Superior Province of Canada Igneous rock associations...

Lucy Anne Formation Stratigraphic range: Neoproterozoic Pha. Proterozoic Archean Had. Type Formation Unit of Marystown Group Lithology Primary Mafic volcanics...

deformation associated with many Precambrian volcanic rocks, particularly Archean volcanic rocks, makes the determination of their origin difficult, if not...

of macroscopic marine algae Temporal range: 1000–0 Ma Pha. Proterozoic Archean Had. Fucus serratus Scientific classification Seaweeds can be found in...

The geology of Mauritania is built on more than two billion year old Archean crystalline basement rock in the Reguibat Shield of the West African Craton...

Government. Archean Group became the first Indian company to begin commercial mining of phosphates in Mauritania in November 2010. Archean operates in...

ISBN 978-0-323-99763-8 Young, Grant M. (March 2019). "Aspects of the Archean-Proterozoic transition: How the great Huronian Glacial Event was initiated...

erupted early in the Earth's history and are rare in rocks younger than Archean in age. Small pieces of peridotite have been found in lunar breccias. The...

oxygen-producing photosynthetic cyanobacteria which oxygenated Earth's Archean atmosphere. The ancestors of cyanobacteria began using water as an electron...

nonetheless evidence that liquid water was already present in the Hadean and Archean eons, leading to what is known as the faint young Sun paradox. Hypothesized...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

mountain is composed of metamorphic rock, and its foothills are composed of archean-old schist and clay schist. Rajaouna Mountain has an artesian well as well...

Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga) Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

Bacteria Temporal range: Paleoarchean–Present 3500–0 Ma Pha. Proterozoic Archean Had. Scanning electron micrograph of Escherichia coli rods Scientific classification...

intracontinental shear zone between two geologic provinces of basement rock of the Archean period which form part of the North American continent. The city lies at...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

Smith, J.P.; Spooner, E.T.C.; Broughton, D.W.; Ploeger, F.R. (1993). Archean Au-Ag-(W) Quartz Vein/Disseminated Mineralisation within the Larder Lake...

Paleontology‎ List of fossiliferous stratigraphic units in South Africa Archean life in the Barberton Greenstone Belt Ordovician Keurbos Notiodella Onychopterella...

mostly of sandy loam. The base rocks are mainly metamorphic, from the Archean. The topography of the sanctuary can be divided into hills, piedmont and...

Lewis by a bridge opened in 1953. The geology of Lewis is dominated by the Archean aged metamorphic gneisses of the eponymous Lewisian complex. Despite sharing...

Lydonia Temporal range: late Ediacaran ~565–560 Ma Pha. Proterozoic Archean Had. Tonian Cryo. Edia. A jesmonite cast of the Lydonia jiggamintia holotype...

pre-Garzón 1800 Tapajós orogeny Mitú (1800) 1950 Transamazonic orogeny pre-Mitú 2200 Columbia 2530 Archean Carajas-Imataca orogeny 3100 Kenorland Sources...

calculations of less than 100 million years). Holmes estimated the oldest Archean rocks to be 1,600 million years old, but did not speculate about the Earth's...