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Pentelikon
Mount Pentelicus or Pentelikon (, or ) is a mountain in Attica, Greece, situated northeast of Athens and southwest of Marathon. Its highest point is the peak ''Pyrgari'', with an elevation of 1,109 m. The mountain is covered in large part with forest (about 60 or 70%), and can be seen from southern Athens (Attica), the Pedia plain, Parnitha, and the southern part of the northern suburbs of Athens. Houses surround the mountain, especially in Vrilissia, Penteli, Ekali, Dionysos and north of Gerakas. Marble from Mount Pentelicus is of exceptionally high quality and was used to construct much of the Athenian Acropolis. Later, Pentelic marble was exported to Rome, where it was used in construction and in sculptures. In ancient times it was also called Brilissos or Brilittos (, ) which is the origin of the name of the nearby suburb of Vrilissia. Mountain Mount Pentelicus has been famous for its marble since antiquity. Pentelic marble was used for the construction of buildings i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerakas
Gerakas ( el, Γέρακας) is a suburb of Athens and a former municipality in East Attica, Greece. Since the 2011 local government reform it is part of the municipality Pallini, of which it is the seat and a municipal unit. In antiquity Gerakas constituted the Athenian ''mesogeia'' deme of Gargittos, of the Aegides tribe, according to the administrative model of Cleisthenes. Today, it is a rapidly developing city of the northern mesogea and the eastern gate to the Athens basin. It is known as the birthplace of the famous philosopher Epicurus. The city is set at a significant place at the junction of Ymittos and Penteli foothills. The limits of Gerakas expand from Stavros up to the Koufos and Desi Hills, 12 km northeast of the centre of Athens and just 2 km west of Pallini. The city has a population of 29,939 residents (in 2011), covering a land area of 6.633 km2 and having a population density of 4,514 residents per km2. Gerakas can be seen at an elevation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dionysos, Greece
Dionysos ( el, Διόνυσος) is a north suburb of Athens and a municipality in northeastern Attica, Greece. The seat of the municipality is the town Agios Stefanos. Geography Dionysos is situated on the northeastern slopes of the forested Penteliko Mountains. It is 5 km south of Agios Stefanos, 9 km west of Nea Makri, on the Aegean Sea coast, and 18 km northeast of Athens city centre. Its built-up area is continuous with those of the neighbouring suburbs Drosia and Rodopoli to the northwest. Even though the town is located only 20 Kilometres away from central Athens, it has a completely different climate, with weather being significantly cooler, including frequent snowfall during the winter. Motorway 1 (Athens - Lamia - Thessaloniki) and the railway from Athens to Thessaloniki pass through the western part of the municipality, near Agios Stefanos. There is a railway station at Agios Stefanos. Dionysos is connected to Kifisia by the 536 Dionysos-Kifisia bus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vrilissia
Vrilissia ( el, Βριλήσσια) is a suburban municipality of the North Athens (regional unit), North Athens regional unit, in the Attica (region), Attica region. It is located in the Athens basin, at the southwestern foot of the Mount Pentelicus, Penteli Mountain. At the 2011 census, the municipality had 30,741 residents. Geography The administrative limits of the municipality extend from the Chalandri gully up to foothills of the Mount Pentelicus, Penteli, known as Patima and Koufos Hills. Vrilissia lies approximately north-east of the centre of the Greek capital and northwest of the city of Pallini, centre of East Attica. The area of the Vrilissia municipality is . Among the municipality's features one notices the low rise profile with four apartment floors maximum at the center, while particularly high is also the rate of private gardens. The centre of the municipality is built up around the Analipseos Main Church (Jesus Christ's Ascension Church), while the commercial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penteli, Greece
Penteli ( el, Πεντέλη) is a village and a municipality in the North Athens regional unit, Attica, Greece. It belongs to the Athens rural area. It takes its name from Mount Pentelicus. Municipality The municipality Penteli was formed at the 2011 local government reform by the merger of the following 3 former municipalities, that became municipal units: *Melissia *Nea Penteli *Penteli Geography Penteli is situated on the southern slopes of the limestone Penteli mountains. The municipality has an area of 36.064 km2, the municipal unit Penteli 28.878 km2. It is 14 km northeast of central Athens. Some of the neighbourhoods of Penteli are Agia Triada, Agios Dimitrios, Daou and Kallithea. History The bones of prehistoric animals - mastodons, rhinoceros, antelope, and giraffe, along with giant turtles, hyenas and other animals no longer extant in the area - have been found among the limestone crags of the mountain that looms over the present suburb of Athens. The Penteli moun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at . Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold. There are many different varieties of quartz, several of which are classified as gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia. Quartz is the mineral defining the val ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accessory Mineral
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): Minerals'; p. 1. In the series ''Geology: Landforms, Minerals, and Rocks''. Rosen Publishing Group. The geological definition of mineral normally excludes compounds that occur only in living organisms. However, some minerals are often biogenic (such as calcite) or are organic compounds in the sense of chemistry (such as mellite). Moreover, living organisms often synthesize inorganic minerals (such as hydroxylapatite) that also occur in rocks. The concept of mineral is distinct from rock, which is any bulk solid geologic material that is relatively homogeneous at a large enough scale. A rock may consist of one type of mineral, or may be an aggregate of two or more different types of minerals, spacially segregated into distinct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcite
Calcite is a Carbonate minerals, carbonate mineral and the most stable Polymorphism (materials science), polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on Scratch hardness, scratch hardness comparison. Large calcite crystals are used in optical equipment, and limestone composed mostly of calcite has numerous uses. Other polymorphs of calcium carbonate are the minerals aragonite and vaterite. Aragonite will change to calcite over timescales of days or less at temperatures exceeding 300 °C, and vaterite is even less stable. Etymology Calcite is derived from the German ''Calcit'', a term from the 19th century that came from the Latin word for Lime (material), lime, ''calx'' (genitive calcis) with the suffix "-ite" used to name minerals. It is thus etymologically related to chalk. When applied by archaeology, archaeologists and stone trade pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clastic Rock
Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus,Essentials of Geology, 3rd Ed, Stephen Marshak, p. G-3 chunks, and smaller grains of rock broken off other rocks by physical weathering.Essentials of Geology, 3rd Ed, Stephen Marshak, p. G-5 Geologists use the term clastic to refer to sedimentary rocks and particles in sediment transport, whether in suspension or as bed load, and in sediment deposits. Sedimentary clastic rocks Clastic sedimentary rocks are rocks composed predominantly of broken pieces or ''clasts'' of older weathered and eroded rocks. Clastic sediments or sedimentary rocks are classified based on grain size, clast and cementing material (matrix) composition, and texture. The classification factors are often useful in determining a sample's environment of deposition. An example of clastic environment would be a river system in which the full range of grains being transported by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Δ18O
In geochemistry, paleoclimatology and paleoceanography ''δ''18O or delta-O-18 is a measure of the ratio of stable isotope The term stable isotope has a meaning similar to stable nuclide, but is preferably used when speaking of nuclides of a specific element. Hence, the plural form stable isotopes usually refers to isotopes of the same element. The relative abundanc ...s oxygen-18 (18O) and oxygen-16 (16O). It is commonly used as a measure of the temperature of precipitation (meteorology), precipitation, as a measure of groundwater/mineral interactions, and as an indicator of processes that show isotope fractionation, isotopic fractionation, like methanogenesis. In paleosciences, 18O:16O data from corals, foraminifera and ice cores are used as a proxy (climate), proxy for temperature. The definition is, in "per mil" (‰, parts per thousand): :\delta \ce = \left( \frac - 1 \right) \times 1000 ‰ where the standard has a known isotopic composition, such as Vienna Standard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Δ13C
In geochemistry, paleoclimatology, and paleoceanography ''δ''13C (pronounced "delta c thirteen") is an isotopic signature, a measure of the ratio of stable isotopes 13C : 12C, reported in parts per thousand (per mil, ‰). The measure is also widely used in archaeology for the reconstruction of past diets, particularly to see if marine foods or certain types of plants were consumed The definition is, in per mil: :\delta \ce = \left( \frac - 1 \right) \times 1000 ‰ where the standard is an established reference material. ''δ''13C varies in time as a function of productivity, the signature of the inorganic source, organic carbon burial, and vegetation type. Biological processes preferentially take up the lower mass isotope through kinetic fractionation. However some abiotic processes do the same, methane from hydrothermal vents can be depleted by up to 50%. Reference standard The standard established for carbon-13 work was the Pee Dee Belemnite (PDB) and was based on a Cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Architect
An architect is a person who plans, designs and oversees the construction of buildings. To practice architecture means to provide services in connection with the design of buildings and the space within the site surrounding the buildings that have human occupancy or use as their principal purpose. Etymologically, the term architect derives from the Latin ''architectus'', which derives from the Greek (''arkhi-'', chief + ''tekton'', builder), i.e., chief builder. The professional requirements for architects vary from place to place. An architect's decisions affect public safety, and thus the architect must undergo specialized training consisting of advanced education and a ''practicum'' (or internship) for practical experience to earn a Occupational licensing, license to practice architecture. Practical, technical, and academic requirements for becoming an architect vary by jurisdiction, though the formal study of architecture in academic institutions has played a pivotal role in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elgin Marbles
The Elgin Marbles (), also known as the Parthenon Marbles ( el, Γλυπτά του Παρθενώνα, lit. "sculptures of the Parthenon"), are a collection of Classical Greek marble sculptures made under the supervision of the architect and sculptor Phidias and his assistants. They are original parts of the Parthenon and other sacred and ceremonial structures built on the Acropolis of Athens in the 5th century BCE. The collection is on display in the British Museum, in the purpose-built Duveen Gallery. The presence of the Elgin Marbles in the British Museum is the subject of international controversy. From 1801 to 1812, agents of Thomas Bruce, 7th Earl of Elgin removed about half of the surviving sculptures of the Parthenon, as well as sculptures from the Propylaea and Erechtheion,''Encyclopædia Britannica'', "Elgin Marbles", 2008, O.Ed. and had them transported by sea to Britain. Elgin argued as his authority for this that he had obtained an official decree (a firman) fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
