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Omo Remains
The Omo remains are a collection of homininThis article quotes historic texts that use the terms 'hominid' and 'hominin' with meanings that may be different from their modern usages. This is because several revisions in classifying the great apes have caused the use of the term "hominid" to vary over time. Its original meaning referred only to humans (''Homo'') and their closest relatives. That restrictive usage has been largely assumed by the term "hominin", which comprises all members of the human clade after the split from the chimpanzees (''Pan (genus), Pan''). The modern meaning of the term "hominid" refers to all the great apes, including humans. Usage still varies, however, and some scientists and laypersons still use the term in the original restrictive sense; the scholarly literature generally will show the traditional usage until around the end of the 20th century. For further information, see ''Hominini'' (at "hominins") and ''Hominidae'' (at discussion of the terms "homin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omo Kibish - MCN 4152 (cropped)
Omo or OMO may refer to: Geography Ethiopia * Omo River (Ethiopia), in southern Ethiopia is the largest Ethiopian river outside the Nile Basin and namesake for all the topics below * Omo Nada, one of the woredas in the Oromia Region of Ethiopia * South Omo Zone, a zone in the Ethiopian Southern Nations, Nationalities and Peoples' Region (SNNPR) * Omo National Park, Ethiopia * Omo Kibish Formation, an East African rock formation * Omo remains, a collection of hominid bones Elsewhere *Omo River (Yamanashi) *Omø, an island in Denmark *Omo River (Quebec), a tributary of Maicasagi River in Quebec, Canada People * Omo Aikeremiokha, (born 2005), British trampoline gymnast * Omo Osaghae (born 1988), American hurdler * Suleiman Omo (born 1985), Nigerian footballer for clubs in southeastern Europe Acronyms and codes * Open market operation, by the Federal Reserve or other central banks * Open Market Option allows someone approaching retirement to ‘shop around’ * One-man operation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as ''tuffaceous'' (for example, ''tuffaceous sandstone''). A pyroclastic rock containing 25–75% volcanic bombs or volcanic blocks is called tuff breccia. Tuff composed of sandy volcanic material can be referred to as volcanic sandstone. Tuff is a relatively soft rock, so it has been used for construction since ancient times. Because it is common in Italy, the Romans used it often for construction. The Rapa Nui people used it to make most of the ''moai'' statues on Easter Island. Tuff can be classified as either igneous or sedimentary rock. It is usually studied in the context of igneous petrology, although it is sometimes described using sedimentological terms. Tuff is often erroneously called t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossil Sites
This list of fossil sites is a worldwide list of localities known well for the presence of fossils. Some entries in this list are notable for a single, unique find, while others are notable for the large number of fossils found there. Many of the entries in this list are considered Lagerstätten (sedimentary deposits that exhibits extraordinary fossils with exceptional preservation—sometimes including preserved soft tissues). Lagerstätten are indicated by a note () in the noteworthiness column. Fossils may be found either associated with a geological formation or at a single geographic site. Geological formations consist of rock that was deposited during a specific period of time. They usually extend for large areas, and sometimes there are different important sites in which the same formation is exposed. Such sites may have separate entries if they are considered to be more notable than the formation as a whole. In contrast, extensive formations associated with large areas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature (journal)
''Nature'' is a British weekly scientific journal founded and based in London, England. As a multidisciplinary publication, ''Nature'' features Peer review, peer-reviewed research from a variety of academic disciplines, mainly in science and technology. It has core editorial offices across the United States, continental Europe, and Asia under the international scientific publishing company Springer Nature. ''Nature'' was one of the world's most cited scientific journals by the Science Edition of the 2022 ''Journal Citation Reports'' (with an ascribed impact factor of 50.5), making it one of the world's most-read and most prestigious academic journals. , it claimed an online readership of about three million unique readers per month. Founded in the autumn of 1869, ''Nature'' was first circulated by Norman Lockyer and Alexander MacMillan (publisher), Alexander MacMillan as a public forum for scientific innovations. The mid-20th century facilitated an editorial expansion for the j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jebel Irhoud
Jebel Irhoud or Adrar n Ighoud (; , Moroccan Arabic: ), is an archaeological site located just north of the town of Ighoud, Tlet Ighoud in Youssoufia Province, approximately south-east of the city of Safi, Morocco, Safi in Morocco. It is noted for the hominin fossils that have been found there since the discovery of the site in 1961. Originally thought to be Neanderthals, the specimens have since been assigned to ''Homo sapiens'' and, as reported in 2017, have been dated to roughly 300,000 years ago ( for the Irhoud 3 mandible, based on other fossils and the flint artefacts found nearby). * * "Here we report the ages, determined by thermoluminescence dating, of fire-heated flint artefacts obtained from new excavations at the Middle Stone Age site of Jebel Irhoud, Morocco, which are directly associated with newly discovered remains of H. sapiens8. A weighted average age places these Middle Stone Age artefacts and fossils at 315 ± 34 thousand years ago. Support is obtained th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Florisbad Skull
The Florisbad Skull is an important human fossil of the early Middle Stone Age, representing either late ''Homo heidelbergensis'' or early ''Homo sapiens''. It was discovered in 1932 by T. F. Dreyer at the Florisbad site, Free State Province, South Africa. Research history Discovery In 1835, early voortrekkers discovered a lithium spring by the Haagenstad saltpan, which was settled by Hendrik Venter. After his death, his grandson Floris commercialised the site, and Florisbad became a regionally famous bath. In 1912, during excavations into an adjacent hillock to expand the bath, workers discovered animal fossils and stone tools. English professor Geo Potts and South African palaeontologist Robert Broom were sent by the National Museum, Bloemfontein, to investigate. They were able to study the material collected by Venter's wife, Martha Johanna Venter, and Broom suggested further excavation might yield human fossils. In 1917, South African zoologist Thomas Frederik Dreyer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Levant
The Levant ( ) is the subregion that borders the Eastern Mediterranean, Eastern Mediterranean sea to the west, and forms the core of West Asia and the political term, Middle East, ''Middle East''. In its narrowest sense, which is in use today in archaeology and other cultural contexts, it is equivalent to Cyprus and a stretch of land bordering the Mediterranean Sea in Western AsiaGasiorowski, Mark (2016). ''The Government and Politics of the Middle East and North Africa''. p. 5: "... today the term ''Levantine'' can describe shared cultural products, such as Levantine cuisine or Levantine archaeology". .Steiner & Killebrew, p9: "The general limits ..., as defined here, begin at the Plain of 'Amuq in the north and extend south until the Wâdī al-Arish, along the northern coast of Sinai. ... The western coastline and the eastern deserts set the boundaries for the Levant ... The Euphrates and the area around Jebel el-Bishrī mark the eastern boundary of the northern Levant, as d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speleothems
A speleothem (; ) is a geological formation made by mineral deposits that accumulate over time in natural caves. Speleothems most commonly form in calcareous caves due to carbonate dissolution reactions. They can take a variety of forms, depending on their depositional history and environment. Their chemical composition, gradual growth, and preservation in caves make them useful paleoclimatic proxies. Chemical and physical characteristics More than 300 variations of cave mineral deposits have been identified. The vast majority of speleothems are calcareous, composed of calcium carbonate (CaCO3) minerals (calcite or aragonite). Less commonly, speleothems are made of calcium sulfate (gypsum or mirabilite) or opal. Speleothems of pure calcium carbonate or calcium sulfate are translucent and colorless. The presence of iron oxide or copper provides a reddish brown color. The presence of manganese oxide can create darker colors such as black or dark brown. Speleothems can also be br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapropel
Sapropel (a contraction of Ancient Greek words ''sapros'' and ''pelos'', meaning putrefaction and mud (or clay), respectively) is a term used in marine geology to describe dark-coloured sediments that are rich in organic matter. Organic carbon concentrations in sapropels commonly exceed 2 wt.% in weight. The term sapropel events may also refer to cyclic oceanic anoxic events (OAE), in particular those affecting the Mediterranean Sea with a periodicity of about 21,000 years. Formation Sapropels have been recorded in the Mediterranean sediments since the closure of the Eastern Tethys Ocean 13.5 million years ago. The formation of sapropel events in the Mediterranean Sea occurs approximately every 21,000 years and last between 3,000 and 5,000 years. The first identification of these events occurred in the mid-20th century. Since then, their formulative conditions of have been investigated. The occurrence of sapropels has been related to the Earth's orbital parameters (Milankovit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiometric Dating
Radiometric dating, radioactive dating or radioisotope dating is a technique which is used to Chronological dating, date materials such as Rock (geology), rocks or carbon, in which trace radioactive impurity, impurities were selectively incorporated when they were formed. The method compares the abundance of a naturally occurring Radionuclide, radioactive isotope within the material to the abundance of its Radioactive decay, decay products, which form at a known constant rate of decay. Radiometric dating of minerals and rocks was pioneered by Ernest Rutherford (1906) and Bertram Boltwood (1907). Radiometric dating is now the principal source of information about the Absolute dating, absolute age of rocks and other Geology, geological features, including the age of Paleontology, fossilized life forms or the age of Earth itself, and can also be used to date a wide range of natural and Artifact (archaeology), man-made materials. Together with stratigraphy, stratigraphic principles, ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homo Sapiens Idaltu
Herto Man refers to human remains (''Homo sapiens'') discovered in 1997 from the Upper Herto member (geology), member of the Bouri Formation in the Afar Triangle, Ethiopia. The remains have been dated as between 154,000 and 160,000 years old. The discovery of Herto Man was especially significant at the time, falling within a long gap in the fossil record between 300 and 100 thousand years ago and representing the oldest dated ''H. sapiens'' remains then described. In the original description paper, these 12 (at minimum) individuals were described as falling just outside the umbrella of "anatomically modern human". Thus, Herto Man was classified into a new subspecies as "''Homo sapiens idaltu''" ( "elder"). It supposedly represented a transitional morph between the more archaic ''Homo rhodesiensis, H. (s.?) rhodesiensis'' and ''H. s. sapiens'' (that is, a stage in a chronospecies). Subsequent researchers have rejected this classification. The validity of such subspecies is difficul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Stone Age
The Middle Stone Age (or MSA) was a period of African prehistory between the Early Stone Age and the Late Stone Age. It is generally considered to have begun around 280,000 years ago and ended around 50–25,000 years ago. The beginnings of particular MSA stone tools have their origins as far back as 550–500,000 years ago and as such some researchers consider this to be the beginnings of the MSA. The MSA is often mistakenly understood to be synonymous with the Middle Paleolithic of Europe, especially due to their roughly contemporaneous time span; however, the Middle Paleolithic of Europe represents an entirely different hominin population, Neanderthal, ''Homo neanderthalensis'', than the MSA of Africa, which did not have Neanderthal populations. Additionally, current archaeological research in Africa has yielded much evidence to suggest that modern human behavior and cognition was beginning to develop much earlier in Africa during the MSA than it was in Europe during the M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
