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Antarcticoceras
''Antarcticoceras'' is a genus of crioconic ammonites in the family Shasticrioceratidae. It lived during the Early Cretaceous Period. ''Antarcticioceras'' fossils can be found in the Cretaceous rocks of Antarctica and South America.M.R.A. Thomson, « Ammonite faunas of the Lower Cretaceous of south-eastern Alexander Island », ''British Antarctic Survey Scientific Reports'', 80 (1974), p.1-44. Taxonomy and evolution The type species of ''Antarcticoceras,'' ''A. antarcticum,'' was described from 6 (possibly 7) specimens that were recovered from Alexander Island: the largest antarctic island. When these specimens were first recovered, it was thought they represented an unknown taxon within the Ancyloderid subfamily Helicancyanae. Thmpson, M. 1971. Ammonite Faunas of south eastern Alexander Island and their stratigraphical significance. In: Aide, R. ed. Antarctic Geology and Geophysics This original hypothesis was made because the first two specimens recovered were smaller in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancyloceratidae
Ancyloceratidae is a family of heteromorphic Ammonitida, ammonites that lived during the Early Cretaceous. Their shells begin as a loose spiral with whorls not touching which then turns into a straight shaft that ends in a J-shape hook or bend at end. Coarse ribbing and spines are common. Ancyloceratidae is the type family for the Ancyloceratoidea and of the suborder Ancyloceratina. They are found in Lower Cretaceous, Barremian to perhaps Lower Albian sediments. Genera include: *''Ammonitoceras'' Dumas, 1876 *''Ancyloceras'' D'Orbigny, 1842 - type genus *''Ancylotropaeum'' Casey, 1980 *''Antarcticoceras'' Thomson, 1974 M.R.A. Thomson, « Ammonite faunas of the Lower Cretaceous of south-eastern Alexander Island », ''British Antarctic Survey Scientific Reports'', 80 (1974), p.1-44. *''Audouliceras'' Thomel, 1965 *''Australiceras'' Whitehouse, 1926 *''Caspianites'' Casey, 1961 *''Epancyloceras'' Spath, 1930 *''Epitroapeum'' Kakabadze, 1977 *''Helicancyloceras'' Klinger & Kennedy, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chañarcillo Basin
Chañarcillo is a town and mine in the Atacama Desert of Copiapó Province, Atacama Region, Chile, located near Vallenar and 60 km from Copiapó. It is noted for its silver mining. The town grew up after the Chañarcillo silver mine was discovered on May 16, 1832, by Juan Godoy. This event sparkled the Chilean silver rush. Villalobos, Sergio; Silva, Osvaldo; Silva Fernando and Estelle, Patricio. Historia de Chile. Editorial Universitaria 1995. First Edition: 1974. p. 469-472. It grew in prominence in the second half of the nineteenth century and became important in the Atacama mining industry and one of the most important mines to the Chilean economy. It was connected by railway before 1862. Today the settlement is largely in ruins. The Chanarcillo District produced at least $100 million in silver before abandonment. This production from up to 20 mines was limited to a third of a square mile. From 1860 until 1885, 2,500,000 kg of silver was produced. Most production occurred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kg Hut New View
KG, Kg, kG or kg may refer to: Units of measurement * kg, the kilogram, the SI base unit of mass * kG or kGs, the kilogauss, a unit of measurement of magnetic induction People * KG (wrestler), ring name of Syuri (born 1989) * K. G. Cunningham (born 1939), Australian radio presenter and cricketer * Kevin Garnett (born 1976), nicknamed KG, American basketball player * Kyle Gass (born 1960), nicknamed KG, American musician of Tenacious D * Kagiso Rabada (born 1995), nicknamed KG, South African cricketer Places * Bad Kissingen, Germany, vehicle registration code KG * Kragujevac, Serbia, vehicle registration code KG * Kyrgyzstan, ISO 3166 country code KG ** .kg, Internet country code top-level domain for Kyrgyzstan Transportation * , a Venezuelan airline, IATA airline designator KG * Ship's center of gravity above keel Other uses * ''K.G.'' (album), a 2020 album by King Gizzard & the Lizard Wizard * , the highest state court in Berlin, Germany * , a military combat formation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nomen Nudum
In taxonomy, a ''nomen nudum'' ('naked name'; plural ''nomina nuda'') is a designation which looks exactly like a scientific name of an organism, and may have originally been intended to be one, but it has not been published with an adequate description. This makes it a "bare" or "naked" name, which cannot be accepted as it stands. A largely equivalent but much less frequently used term is ''nomen tantum'' ("name only"). In zoology According to the rules of zoological nomenclature a ''nomen nudum'' is unavailable; the glossary of the ''International Code of Zoological Nomenclature'' gives this definition: And among the rules of that same Zoological Code: In botany According to the rules of botanical nomenclature a ''nomen nudum'' is not validly published. The glossary of the ''International Code of Nomenclature for algae, fungi, and plants'' gives this definition: The requirements for the diagnosis or description are covered by articles 32, 36, 41, 42, and 44. ''Nomina nud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ventral
Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek language, Greek roots, describe something in its standard anatomical position. This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axis, anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal. Additionally, for some animals such as invertebrates, some terms may not have any meaning at all; for example, an animal that is radially symmetrical will have no anterior surface, but can still have a description that a part is close to the middle ("proximal") or further from the middle ("distal"). International organisations have determined vocabularies that are often used as standard vocabular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tubercule
In anatomy, a tubercle (literally 'small tuber', Latin for 'lump') is any round Nodule (medicine), nodule, small wikt:eminence, eminence, or warty outgrowth found on external or internal Organ (anatomy), organs of a plant or an animal. In plants A tubercle is generally a wart-like projection, but it has slightly different meaning depending on which family of plants or animals it is used to refer to. In the case of certain orchids and cactus, cacti, it denotes a round nodule, small wikt:eminence, eminence, or warty outgrowth found on the Labellum (botany), lip. They are also known as podaria (singular ''podarium''). When referring to some members of the Fabaceae, pea family, it is used to refer to the wart-like excrescences that are found on the roots. In fungi In mycology, a tubercle is used to refer to a mass of hyphae from which a mushroom is made. In animals When it is used in relation to certain dorid nudibranchs such as ''Peltodoris nobilis'', it means the nodules on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatomical Terms Of Location
Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal. Additionally, for some animals such as invertebrates, some terms may not have any meaning at all; for example, an animal that is radially symmetrical will have no anterior surface, but can still have a description that a part is close to the middle ("proximal") or further from the middle ("distal"). International organisations have determined vocabularies that are often used as standard vocabularies for subdisciplines of anatom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crioceratidae
The Crioceratidae constitute a family of loosely to closely coiled Ammonitida included in the Ancyloceratoidea that lived during the Early Cretaceous; characterized by '' Crioceratites'' and other genera such as '' Hoplocrioceras'' and '' Paracrioceras''. The Crioceratidae are gyroconic, coiled in a plane, generally with space between the whorls although in some like ''Balearites'' the whorls are barely in contact. Although distinct in character and not truly heteromorphic the Crioceratidae were included in the American TreatisePart L, 1957, in the Ancyloceratidae as the subfamily Crioceratinae. It is now considered a distinct family as originally proposed by Wright 1952 with the Acrioceratidae Acrioceratidae is a family of heteromorph ammonites included in the Ancyloceratoidea comprising ancyloceratid-like forms that start off with a coiled juvenile section, followed by a straight or curved shaft ending in a hook. Two described gener ..., proposed by Vermeulen (2004), a t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypothesis
A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories. Even though the words "hypothesis" and "theory" are often used interchangeably, a scientific hypothesis is not the same as a scientific theory. A working hypothesis is a provisionally accepted hypothesis proposed for further research in a process beginning with an educated guess or thought. A different meaning of the term ''hypothesis'' is used in formal logic, to denote the antecedent of a proposition; thus in the proposition "If ''P'', then ''Q''", ''P'' denotes the hypothesis (or antecedent); ''Q'' can be called a consequent. ''P'' is the assumption in a (possibly counterfactual) ''What If'' question. The adjective ''hypothetical'', meaning "hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
