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Graptolitic Argillite
Graptolitic argillite (also known as dictyonema argillite, dictyonema oil shale, dictyonema shale, or Tremadocian black shale) is a marinite-type black shale of sapropelic origin. It is a blackish to greyish Lithification, lithified claystone. The known occurrence of this rock is a graptolitic argillite of the Türisalu Formation in northern Estonia and northwest Russia. It is correlated with Swedish alum shale being its younger facial eastward continuation, and both being a part of the Baltoscandic Cambrian-Ordovician black shale, together with black shales in the Oslo region in Norway, Bornholm, Denmark, and Poland. Other known occurrences are in North America,#dover, Dover et al. (1980), p. 1 the Malay Peninsula, and New Zealand. Although the name dictyonema argillite is widely used instead of graptolitic argillite, this name is now considered a misnomer as the graptolite fossils in the rock, earlier considered dictyonemids, were reclassified during the 1980s as mem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrite
The mineral pyrite (), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Iron, FeSulfur, S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. Pyrite's metallic Luster (mineralogy), luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of ''fool's gold''. The color has also led to the nicknames ''brass'', ''brazzle'', and ''Brazil'', primarily used to refer to pyrite found in coal. The name ''pyrite'' is derived from the Greek language, Greek (), 'stone or mineral which strikes fire', in turn from (), 'fire'. In ancient Roman times, this name was applied to several types of stone that would create sparks when struck against steel; Pliny the Elder described one of them as being brassy, almost certainly a reference to what we now call pyrite. By Georgius Agricola's time, , the term had become a generic term for all of the pyrite group, sulfide minerals. Pyrite is usua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Association Of Petroleum Geologists
The American Association of Petroleum Geologists (AAPG) is one of the world's largest professional geological societies with more than 40,000 members across 129 countries as of 2021. The AAPG works to "advance the science of geology, especially as it relates to petroleum, natural gas, other subsurface fluids, and mineral resources; to promote the technology of exploring for, finding, and producing these materials in an economically and environmentally sound manner; and to advance the professional well-being of its members." The AAPG was founded in 1917 and is headquartered in Tulsa, Oklahoma; currently almost one-third of its members live outside the United States. Over the years, the activities of the AAPG have broadened so that they bring together not just geology but also geophysics, geochemistry, engineering, and innovative analytics to enable the more efficient and environmentally-friendly approaches to the development of all earth-based energy sources. New transformative techn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joules
The joule ( , ; symbol: J) is the unit of energy in the International System of Units (SI). It is equal to the amount of work done when a force of 1 newton displaces a mass through a distance of 1 metre in the direction of the force applied. It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889). Definition In terms of SI base units and in terms of SI derived units with special names, the joule is defined as One joule can also be defined by any of the following: * The work required to move an electric charge of one coulomb through an electrical potential difference of one volt, or one coulomb-volt (C⋅V). This relationship can be used to define the volt. * The work required to produce one watt of power for one second, or one watt-second (W⋅s) (compare kilowatt-hour, which is 3.6 megajoules). This relationship can be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calorific Value
The heating value (or energy value or calorific value) of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it. The ''calorific value'' is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard conditions. The chemical reaction is typically a hydrocarbon or other organic molecule reacting with oxygen to form carbon dioxide and water and release heat. It may be expressed with the quantities: * energy/mole of fuel * energy/mass of fuel * energy/volume of the fuel There are two kinds of enthalpy of combustion, called high(er) and low(er) heat(ing) value, depending on how much the products are allowed to cool and whether compounds like are allowed to condense. The high heat values are conventionally measured with a bomb calorimeter. Low heat values are calculated from high heat value test data. They may also be calculated as the difference bet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur
Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most abundant element by mass in the universe and the fifth most on Earth. Though sometimes found in pure, native form, sulfur on Earth usually occurs as sulfide and sulfate minerals. Being abundant in native form, sulfur was known in ancient times, being mentioned for its uses in ancient India, ancient Greece, China, and ancient Egypt. Historically and in literature sulfur is also called brimstone, which means "burning stone". Today, almost all elemental sulfur is produced as a byproduct of removing sulfur-containing contaminants from natural gas and petroleum.. Downloahere The greatest commercial use of the element is the production o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Estonian Archipelago
West Estonian archipelago ( et, Lääne-Eesti saarestik, also Moonsund archipelago) is a group of Estonian islands located in the Baltic Sea around Väinameri. The total area is about . The archipelago is composed of the islands Saaremaa, Hiiumaa, Muhu, Vormsi and about 900 other smaller islands. Protected areas UNESCO established the West Estonian Archipelago Biosphere Reserve in 1990 under the Man and the Biosphere Programme. See also *List of islands of Estonia *Estonian Swedes References External linksThe Väinameri SeaEstonica Archipelagoes of the Baltic Sea • In typography, a bullet or bullet point, , is a typographical symbol or glyph used to introduce items in a list. For example: *Point 1 *Point 2 *Point 3 The bullet symbol may take any of a variety of shapes, such as circular, square, diamo ... Biosphere reserves of Estonia Gulf of Riga {{estonia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Narva
Narva, russian: Нарва is a municipality and city in Estonia. It is located in Ida-Viru County, Ida-Viru county, at the Extreme points of Estonia, eastern extreme point of Estonia, on the west bank of the Narva (river), Narva river which forms the Estonia–Russia border, Estonia–Russia international border. With 54,409 inhabitants (as of 2020) Narva is Estonia's third largest city after capital Tallinn and Tartu. In 1944, Narva was nearly completely destroyed during the battles of World War II. During the period of Soviet occupation of Estonia, Soviet occupation (1944–1991), the city’s original native inhabitants were not permitted to return after the war, and immigrant workers from Russia and other parts of the Soviet Union, former USSR were brought in to populate the city. The city whose population had been, as of 1934 census, 65% ethnic Estonian, became overwhelmingly non-Estonian in the second half of the 20th century. According to more recent data, 46.7% of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pakri Peninsula
Pakri Peninsula extends from northwestern mainland Estonia's Harju County into the Baltic Sea. Its length is 12 km and its area is about 40 km2. Portions of the peninsula were protected in 1998 as the Pakri Landscape Conservation Area on the basis of its unique geological features, valuable communities of flora and fauna, and historic interest. The port town of Paldiski is located on the peninsula. Footnotes References *Lichens and their substrate preferences on the Pakri Peninsula (Northwest Estonia University of Tartu The University of Tartu (UT; et, Tartu Ülikool; la, Universitas Tartuensis) is a university in the city of Tartu in Estonia. It is the national university of Estonia. It is the only classical university in the country, and also its biggest .... Peninsulas of Estonia Landforms of Harju County {{Estonia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North-Estonia Klint
The Baltic Klint (Clint, Glint; et, Balti klint, sv, Baltiska klinten, russian: Балтийско-Ладожский уступ, Глинт) is an erosional limestone escarpment and cuesta on several islands of the Baltic Sea, in Estonia, in Leningrad Oblast of Russia and in the islands of Gotland and Öland of Sweden. It was featured on the reverse of the 50 krooni note of 1928 and on the 100 krooni note of 1992. The Baltic Klint is active landform showing some retreat in the present. However it is not known to which degree the Baltic Klint originated in postglacial time or if it evolved from cliff-like forms sculpted by the Fennoscandian Ice Sheet. In Gotland 20th century cliff retreat rates have been estimated at 0.15 to 0.78 cm/year. Retreat of the Baltic Klint in Gotland has widened shore platforms. Geography The Baltic Klint extends approximately 1200 km from the island of Öland in Sweden through the continental shelf and the Estonian islands of Osmussaa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graptolitic Argillite In Northern Estonia
Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia. These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian (Miaolingian, Wuliuan) through the Lower Carboniferous ( Mississippian). A possible early graptolite, ''Chaunograptus'', is known from the Middle Cambrian. Recent analyses have favored the idea that the living pterobranch ''Rhabdopleura'' represents an extant graptolite which diverged from the rest of the group in the Cambrian. Fossil graptolites and ''Rhabdopleura'' share a colony structure of interconnected zooids housed in organic tubes (theca) which have a basic structure of stacked half-rings (fuselli). Most extinct graptolites belong to two major orders: the bush-like sessile Dendroidea and the planktonic, free-floating Graptoloidea. These orders most likely evolved from encrusting pterobranchs similar to ''Rhabdopleura''. Due to their widespread abundance, plantkonic l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhabdinopora
''Rhabdinopora'' is a genus of graptolites belonging to the family Anisograptidae. It is the earliest planktic graptolite and is presumably the ancestor of all later planktic graptoloids. Some species identified as the first planktid graptolite are: *''Rhabdinopora proparabola'' *''Rhabdinopora praeparabola'' *''Rhabdinopora parabola'' *''Rhabdinopora flabelliformis ''Rhabdinopora'' is a genus of graptolites belonging to the family Anisograptidae. It is the earliest planktic graptolite and is presumably the ancestor of all later planktic graptoloids. Some species identified as the first planktid graptolite ...'' References Graptolite genera Ordovician animals of Asia Paleozoic life of Newfoundland and Labrador {{Paleo-deuterostome-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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