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Gyali
Gyali ( el, Γυαλί "glass", also spelled Giali or Yali, pronounced ) is a volcanic Greek island in the Dodecanese, located halfway between the south coast of Kos (Kardamaina) and Nisyros. It consists of rhyolitic obsidian lava domes and pumice deposits (which are mined in huge quantities). The island has two distinct segments, with the northeastern part almost entirely made of obsidian and the southwestern part of pumice. These are connected by a narrow isthmus and beach made of modern reef sediments. Anciently, the island was known as Istros ( grc, Ἴστρος). Geography The island is long and between and across. It has a cave. Parts of the island undergoing pumice strip mining are barren of vegetation. The 2001 census reported a resident population of 10 people. Administratively, it is part of the municipality of Nisyros. Its also popular for Perli, a thermo powder added in construction. See also *List of volcanoes in Greece This is a list of active and e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nisyros
Nisyros also spelled Nisiros ( el, Νίσυρος, Nísiros) is a volcanic Greek island and municipality located in the Aegean Sea. It is part of the Dodecanese group of islands, situated between the islands of Kos and Tilos. Its shape is approximately round, with a diameter of about , and an area of . Several other islets are found in the direct vicinity of Nisyros, the largest of which is Gyali, with a population of 22 citizens. The Municipality of Nisyros includes Gyalí, as well as uninhabited Pacheiá, Pergoússa, Kandelioussa, Ágios Antónios and Stroggýli. It has a total land area of and a total population of 1,008 inhabitants. The island was also called ''Nisiro'' in Italian and ''İncirli'' in Turkish. Geology The island has a wide caldera, and was formed within the past 150,000 years, with three separate eruptive stages, ranging from explosive and effusive andesitic eruptions to explosive and effusive dacitic and rhyolitic activity. Its coasts are generally r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obsidian
Obsidian () is a naturally occurring volcanic glass formed when lava extrusive rock, extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolite, rhyolitic lava flows known as obsidian flows. These flows have a high content of silicon dioxide, silica, granting them a high viscosity. The high viscosity inhibits atomic diffusion, diffusion of atoms through the lava, which inhibits the first step (nucleation) in the formation of mineral crystals. Together with rapid cooling, this results in a natural glass forming from the lava. Obsidian is hard, Brittleness, brittle, and amorphous; it therefore Fracture (mineralogy)#Conchoidal fracture, fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as surgic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Islands Of Greece
Greece has many islands, with estimates ranging from somewhere around 1,200 to 6,000, depending on the minimum size to take into account. The number of inhabited islands is variously cited as between 166 and 227. The largest Greek island by area is Crete, located at the southern edge of the Aegean Sea. The second largest island is Euboea or Evvia, which is separated from the mainland by the 60m-wide Euripus Strait, and is administered as part of the Central Greece (region), Central Greece region. After the third and fourth largest Greek islands, Lesbos and Rhodes, the rest of the islands are two-thirds of the area of Rhodes, or smaller. The Greek islands are traditionally grouped into the following clusters: the Argo-Saronic Islands in the Saronic Gulf near Athens; the Cyclades, a large but dense collection occupying the central part of the Aegean Sea; the North Aegean islands, a loose grouping off the west coast of Turkey; the Dodecanese, another loose collection in the south ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Volcanoes In Greece ...
This is a list of active and extinct volcanoes in Greece. References * Schwandner, F.M. (1998)Polyphase Meso-Cenozoic Structural Development on Poros Island (Greece) ''Bulletin of the Geological Society of Greece'' 32 + (1): 129-136. {{Greece topics Greece Volcanoes A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dodecanese
The Dodecanese (, ; el, Δωδεκάνησα, ''Dodekánisa'' , ) are a group of 15 larger plus 150 smaller Greek islands in the southeastern Aegean Sea and Eastern Mediterranean, off the coast of Turkey's Anatolia, of which 26 are inhabited. This island group generally defines the eastern limit of the Sea of Crete. They belong to the wider Southern Sporades island group. Rhodes has been the area's dominant island since antiquity. Of the others, Kos and Patmos are historically the more important; the remaining twelve are Agathonisi, Astypalaia, Halki, Kalymnos, Karpathos, Kasos, Leipsoi, Leros, Nisyros, Symi, Tilos, and Kastellorizo. Other islands in the chain include Alimia, Arkoi, Farmakonisi, Gyali, Kinaros, Levitha, Marathos, Nimos, Pserimos, Saria, Strongyli and Syrna. Name The name "Dodecanese" (older form ἡ Δωδεκάνησος, ''hē Dōdekanēsos''; modern τα Δωδεκάνησα, ''ta Dōdekanēsa''), meaning "The Twelve Islands", or ''Oniki Adalar'' in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glass
Glass is a non-crystalline, often transparent, amorphous solid that has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics. Glass is most often formed by rapid cooling (quenching) of the molten form; some glasses such as volcanic glass are naturally occurring. The most familiar, and historically the oldest, types of manufactured glass are "silicate glasses" based on the chemical compound silica (silicon dioxide, or quartz), the primary constituent of sand. Soda–lime glass, containing around 70% silica, accounts for around 90% of manufactured glass. The term ''glass'', in popular usage, is often used to refer only to this type of material, although silica-free glasses often have desirable properties for applications in modern communications technology. Some objects, such as drinking glasses and eyeglasses, are so commonly made of silicate-based glass that they are simply called by the name of the material. Despite bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strip Mining
Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnels. In North America, where the majority of surface coal mining occurs, this method began to be used in the mid-16th century and is practiced throughout the world in the mining of many different minerals. In North America, surface mining gained popularity throughout the 20th century, and surface mines now produce most of the coal mined in the United States. In most forms of surface mining, heavy equipment, such as earthmovers, first remove the overburden. Next, large machines, such as dragline excavators or bucket-wheel excavators, extract the mineral. The pros of surface mining are that it has a lower financial cost and is a lot safer than undergrou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene Lava Domes
The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene has been identified with the current warm period, known as MIS 1. It is considered by some to be an interglacial period within the Pleistocene Epoch, called the Flandrian interglacial.Oxford University Press – Why Geography Matters: More Than Ever (book) – "Holocene Humanity" section https://books.google.com/books?id=7P0_sWIcBNsC The Holocene corresponds with the rapid proliferation, growth and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global sign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of The Aegean
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Greece
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Aegean
The South Aegean ( el, Περιφέρεια Νοτίου Αιγαίου, translit=Periféria Notíou Eyéou, ) is one of the thirteen administrative regions of Greece. It consists of the Cyclades and Dodecanese island groups in the central and southeastern Aegean Sea. Administration The South Aegean region was established in the 1987 administrative reform. With the 2010 Kallikratis plan, its powers and authority were redefined and extended. Along with the North Aegean region, it is supervised by the Decentralized Administration of the Aegean based at Piraeus. The capital of the region is situated in Ermoupoli on the island of Syros. The administrative region includes 50 inhabited islands, including the popular tourism destinations of Mykonos, Santorini and Rhodes. Until the Kallikratis reform, the region consisted of the two prefectures of the Cyclades (capital: Ermoupoli) and the Dodecanese (capital: Rhodes). Since 1 January 2011 it is divided into 13 regional units, form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regional Units Of Greece
The 74 regional units of Greece ( el, περιφερειακές ενότητες, ; sing. , ) are the country's Seventy-four second-level administrative units. They are divisions of the country's 13 regions, and are further divided into municipalities. They were introduced as part of the Kallikratis administrative reform on 1 January 2011 and are comparable in area and, in the mainland, coterminous with the 'pre-Kallikratis' prefectures of Greece During the first administrative division of independent Greece in 1833–1836 and again from 1845 until their abolition with the Kallikratis reform in 2010, the prefectures ( el, νομοί, sing. νομός, translit=nomoi, sing. nomós) were .... List References {{Articles on second-level administrative divisions of European countries Regional units Greece transport-related lists Subdivisions of Greece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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