1.
Geographic coordinate system
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A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation
2.
Ottoman Empire
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After 1354, the Ottomans crossed into Europe, and with the conquest of the Balkans the Ottoman Beylik was transformed into a transcontinental empire. The Ottomans ended the Byzantine Empire with the 1453 conquest of Constantinople by Mehmed the Conqueror, at the beginning of the 17th century the empire contained 32 provinces and numerous vassal states. Some of these were later absorbed into the Ottoman Empire, while others were granted various types of autonomy during the course of centuries. With Constantinople as its capital and control of lands around the Mediterranean basin, while the empire was once thought to have entered a period of decline following the death of Suleiman the Magnificent, this view is no longer supported by the majority of academic historians. The empire continued to maintain a flexible and strong economy, society, however, during a long period of peace from 1740 to 1768, the Ottoman military system fell behind that of their European rivals, the Habsburg and Russian Empires. While the Empire was able to hold its own during the conflict, it was struggling with internal dissent. Starting before World War I, but growing increasingly common and violent during it, major atrocities were committed by the Ottoman government against the Armenians, Assyrians and Pontic Greeks. The word Ottoman is an anglicisation of the name of Osman I. Osmans name in turn was the Turkish form of the Arabic name ʿUthmān, in Ottoman Turkish, the empire was referred to as Devlet-i ʿAlīye-yi ʿOsmānīye, or alternatively ʿOsmānlı Devleti. In Modern Turkish, it is known as Osmanlı İmparatorluğu or Osmanlı Devleti, the Turkish word for Ottoman originally referred to the tribal followers of Osman in the fourteenth century, and subsequently came to be used to refer to the empires military-administrative elite. In contrast, the term Turk was used to refer to the Anatolian peasant and tribal population, the term Rūmī was also used to refer to Turkish-speakers by the other Muslim peoples of the empire and beyond. In Western Europe, the two names Ottoman Empire and Turkey were often used interchangeably, with Turkey being increasingly favored both in formal and informal situations and this dichotomy was officially ended in 1920–23, when the newly established Ankara-based Turkish government chose Turkey as the sole official name. Most scholarly historians avoid the terms Turkey, Turks, and Turkish when referring to the Ottomans, as the power of the Seljuk Sultanate of Rum declined in the 13th century, Anatolia was divided into a patchwork of independent Turkish principalities known as the Anatolian Beyliks. One of these beyliks, in the region of Bithynia on the frontier of the Byzantine Empire, was led by the Turkish tribal leader Osman, osmans early followers consisted both of Turkish tribal groups and Byzantine renegades, many but not all converts to Islam. Osman extended the control of his principality by conquering Byzantine towns along the Sakarya River and it is not well understood how the early Ottomans came to dominate their neighbours, due to the scarcity of the sources which survive from this period. One school of thought which was popular during the twentieth century argued that the Ottomans achieved success by rallying religious warriors to fight for them in the name of Islam, in the century after the death of Osman I, Ottoman rule began to extend over Anatolia and the Balkans. Osmans son, Orhan, captured the northwestern Anatolian city of Bursa in 1326 and this conquest meant the loss of Byzantine control over northwestern Anatolia. The important city of Thessaloniki was captured from the Venetians in 1387, the Ottoman victory at Kosovo in 1389 effectively marked the end of Serbian power in the region, paving the way for Ottoman expansion into Europe
3.
Last Judgment
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In Christian belief, it is the final and eternal judgment by God of the people in every nation resulting in the glorification of some and the punishment of others. The concept is found in all the Canonical gospels, particularly the Gospel of Matthew, Christian Futurists believe it will take place after the Resurrection of the Dead and the Second Coming of Christ while Full Preterists believe it has already occurred. The Last Judgment has inspired numerous artistic depictions, beware of false prophets, which come to you in sheeps clothing, but inwardly they are ravening wolves. Ye shall know them by their fruits, do men gather grapes of thorns, or figs of thistles. Even so, every good tree bringeth forth good fruit, but a corrupt tree bringeth forth evil fruit, a good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit. Every tree that bringeth not forth good fruit is hewn down, therefore, by their fruits ye shall know them. Not every one that saith unto me, Lord, Lord, shall enter into the Kingdom of Heaven, many will say to me in that day, Lord, Lord, have we not prophesied in thy name. And in thy name have cast out devils. and in thy name done many wonderful works, and then will I profess unto them, I never knew you, depart from me, ye that work iniquity. Then said one unto him, Lord, are few that be saved. And he said them, Strive to enter in at the strait gate, for many, I say unto you, will seek to enter in. But he shall say, I tell you, I know you not whence ye are, depart from me, all ye workers of iniquity. There shall be weeping and gnashing of teeth, when ye shall see Abraham, and Isaac, and Jacob, and all the prophets, in the kingdom of God, and you yourselves thrust out. The doctrine is supported by passages in the Books of Daniel, Isaiah. From his presence earth and sky fled away, and no place was found for them, and I saw the dead, great and small, standing before the throne, and books were opened. Then another book was opened, which is the book of life, and the dead were judged by what was written in the books, according to what they had done. Even now the axe is lying at the root of the trees, I baptize you with water for repentance, but one who is more powerful than I is coming after me, I am not worthy to carry his sandals. He will baptize you with the Holy Spirit and fire and his winnowing fork is in his hand, and he will clear his threshing-floor and will gather his wheat into the granary, but the chaff he will burn with unquenchable fire. Just as the weeds are collected and burned up with fire, Then the righteous will shine like the sun in the kingdom of their Father
4.
Turkish language
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Outside of Turkey, significant smaller groups of speakers exist in Germany, Bulgaria, Macedonia, Northern Cyprus, Greece, the Caucasus, and other parts of Europe and Central Asia. Cyprus has requested that the European Union add Turkish as an official EU language, in 1928, as one of Atatürks Reforms in the early years of the Republic of Turkey, the Ottoman Turkish alphabet was replaced with a Latin alphabet. The distinctive characteristics of Turkish are vowel harmony and extensive agglutination, the basic word order of Turkish is subject–object–verb. Turkish has no classes or grammatical gender. Turkish has a strong T–V distinction and usage of honorifics, Turkish uses second-person pronouns that distinguish varying levels of politeness, social distance, age, courtesy or familiarity toward the addressee. The plural second-person pronoun and verb forms are used referring to a person out of respect. Turkic languages belong to the Altaic language group, the Turkic family comprises some 30 living languages spoken across Eastern Europe, Central Asia, and Siberia. Turkish is a member of the Oghuz group of languages, a subgroup of the Turkic language family, there is a high degree of mutual intelligibility between Turkish and the other Oghuz Turkic languages, including Azerbaijani, Turkmen, Qashqai, Gagauz, and Balkan Gagauz Turkish. The earliest known Old Turkic inscriptions are the three monumental Orkhon inscriptions found in modern Mongolia, erected in honour of the prince Kul Tigin and his brother Emperor Bilge Khagan, these date back to the second Turk Kaghanate. The Seljuqs of the Oghuz Turks, in particular, brought their language, following the adoption of Islam c. Turkish literature during the Ottoman period, particularly Divan poetry, was influenced by Persian, including the adoption of poetic meters. One of the tasks of the newly established association was to initiate a reform to replace loanwords of Arabic. By banning the usage of imported words in the press, the association succeeded in removing several hundred words from the language. While most of the words introduced to the language by the TDK were newly derived from Turkic roots, owing to this sudden change in the language, older and younger people in Turkey started to differ in their vocabularies. While the generations born before the 1940s tend to use the terms of Arabic or Persian origin. The past few decades have seen the work of the TDK to coin new Turkish words to express new concepts and technologies as they enter the language. Many of these new words, particularly information technology terms, have received widespread acceptance, however, the TDK is occasionally criticized for coining words which sound contrived and artificial. Some earlier changes—such as bölem to replace fırka, political party—also failed to meet with popular approval, some words restored from Old Turkic have taken on specialized meanings, for example betik is now used to mean script in computer science
5.
Sea of Marmara
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The Bosphorus strait connects it to the Black Sea and the Dardanelles strait to the Aegean Sea. The former also separates Istanbul into its Asian and European sides, the sea has an area of 11,350 km² with the greatest depth reaching 1,370 m. The sea takes its name from the island of Marmara, which is rich in sources of marble, from the Greek μάρμαρον, marble. The seas ancient Greek name Propontis derives from pro- and pontos, deriving from the fact that the Greeks sailed through it to reach the Black Sea, Pontos. The surface salinity of the sea averages about 22 parts per thousand, which is greater than that of the Black Sea. The water is more saline at the sea bottom, averaging salinities of around 38 parts per thousand. This high-density saline water, like that of the Black Sea, water from the Susurluk, Biga and Gonen Rivers also reduces the salinity of the sea, though with less influence than on the Black Sea. With little land in Thrace draining southward, almost all of these rivers flow from Anatolia, the sea contains the archipelago of the Prince Islands and Marmara Island, Avşa and Paşalimanı. The south coast of the sea is heavily indented, and includes the Gulf of İzmit, the Gulf of Gemlik Gulf of Bandırma and the Gulf of Erdek. During a storm on December 29,1999, the Russian oil tanker Volgoneft broke in two in the Sea of Marmara, and more than 1,500 tonnes of oil were spilled into the water. The North Anatolian Fault, which has triggered many major earthquakes in recent years, such as the August and November 1999 earthquakes in Izmit and Düzce, respectively, the International Hydrographic Organization defines the limits of the Sea of Marmara as follows, On the West. The Dardanelles limit of the Aegean Sea, a line joining Cape Rumili with Cape Anatoli
6.
Tsunami
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A tsunami or tidal wave, also known as a seismic sea wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Unlike normal ocean waves which are generated by wind, or tides which are generated by the pull of the Moon and Sun. Tsunami waves do not resemble normal undersea currents or sea waves, Tsunamis generally consist of a series of waves with periods ranging from minutes to hours, arriving in a so-called internal wave train. Wave heights of tens of metres can be generated by large events, numerous terms are used in the English language to describe waves created in a body of water by the displacement of water, however, none of the terms in frequent use are entirely accurate. The term tsunami, meaning harbour wave in literal translation, comes from the Japanese 津波, while not entirely accurate, as tsunami are not restricted to harbours, tsunami is currently the term most widely accepted by geologists and oceanographers. Tsunami are sometimes referred to as tidal waves and this once-popular term derives from the most common appearance of tsunami, which is that of an extraordinarily high tidal bore. Although the meanings of tidal include resembling or having the form or character of the tides, use of the tidal wave is discouraged by geologists. The term seismic sea wave also is used to refer to the phenomenon, prior to the rise of the use of the term tsunami in English-speaking countries, scientists generally encouraged the use of the term seismic sea wave rather than tidal wave. The Sumatran region is not unused to tsunamis either, with earthquakes of varying magnitudes regularly occurring off the coast of the island, Tsunamis are an often underestimated hazard in the Mediterranean Sea and parts of Europe. The tsunami claimed more than 123,000 lives in Sicily, the Storegga Slide in the Norwegian sea and some examples of tsunamis affecting the British Isles refer to landslide and meteotsunamis predominantly and less to earthquake-induced waves. The cause, in my opinion, of this phenomenon must be sought in the earthquake, at the point where its shock has been the most violent the sea is driven back, and suddenly recoiling with redoubled force, causes the inundation. Without an earthquake I do not see how such an accident could happen, the principal generation mechanism of a tsunami is the displacement of a substantial volume of water or perturbation of the sea. This displacement of water is attributed to either earthquakes, landslides, volcanic eruptions, glacier calvings or more rarely by meteorites. The waves formed in this way are then sustained by gravity, tides do not play any part in the generation of tsunamis. Tsunami can be generated when the sea floor abruptly deforms and vertically displaces the overlying water and they grow in height when they reach shallower water, in a wave shoaling process described below. A tsunami can occur in any state and even at low tide can still inundate coastal areas. On April 1,1946, the 8.6 Mw Aleutian Islands earthquake occurred with a maximum Mercalli intensity of VI and it generated a tsunami which inundated Hilo on the island of Hawaii with a 14-metre high surge. Between 165 and 173 were killed, the area where the earthquake occurred is where the Pacific Ocean floor is subducting under Alaska
7.
Aftershock
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An aftershock is a smaller earthquake that occurs after a previous large earthquake, in the same area of the main shock. If an aftershock is larger than the shock, the aftershock is redesignated as the main shock. Aftershocks are formed as the crust around the fault plane adjusts to the effects of the main shock. Typically, aftershocks are found up to an equal to the rupture length away from the fault plane. The pattern of aftershocks helps confirm the size of area that slipped during the main shock, Aftershocks rates and magnitudes follow several well-established empirical laws. The frequency of aftershocks decreases roughly with the reciprocal of time after the main shock and this empirical relation was first described by Fusakichi Omori in 1894 and is known as Omoris law. It is expressed as n = k where k and c are constants, a modified version of Omoris law, now commonly used, was proposed by Utsu in 1961. N = k p p is a third constant which modifies the decay rate. According to these equations, the rate of aftershocks decreases quickly with time, the rate of aftershocks is proportional to the inverse of time since the mainshock and this relationship can be used to estimate the probability of future aftershock occurrence. These patterns describe only the behavior of aftershocks, the actual times, numbers and locations of the aftershocks are stochastic. N =10 a − b M Where, N is the number of greater or equal to M M is magnitude a and b are constants In summary, there are more small aftershocks. Aftershocks are dangerous because they are unpredictable, can be of a large magnitude. An aftershock sequence is deemed to have ended when the rate of seismicity drops back to a background level, i. e. no further decay in the number of events with time can be detected. Land movement around the New Madrid is reported to be no more than 0.2 mm a year, Aftershocks on the San Andreas are now believed to top out at 10 years while earthquakes in New Madrid are considered aftershocks nearly 200 years after the 1812 New Madrid earthquake. Some scientists have tried to use foreshocks to help predict upcoming earthquakes, on the East Pacific Rise however, transform faults show quite predictable foreshock behaviour before the main seismic event. Reviews of data of past events and their foreshocks showed that they have a low number of aftershocks, seismologists use tools such as the Epidemic-Type Aftershock Sequence model to study cascading aftershocks. Following a large earthquake and aftershocks, many people have reported feeling phantom earthquakes when in fact no earthquake was taking place and this condition, known as earthquake sickness is thought to be related to motion sickness, and usually goes away as seismic activity tails off. Earthquake Aftershocks Not What They Seemed at Live Science
8.
Mosque
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A mosque is a place of worship for followers of Islam. There are strict and detailed requirements in Sunni jurisprudence for a place of worship to be considered a mosque, many mosques have elaborate domes, minarets, and prayer halls, in varying styles of architecture. Mosques originated on the Arabian Peninsula, but are now found in all inhabited continents, the mosque serves as a place where Muslims can come together for salat as well as a center for information, education, social welfare, and dispute settlement. The imam leads the congregation in prayer, the first mosque in the world is often considered to be the area around the Kaaba in Mecca now known as the Masjid al-Haram. Others regard the first mosque in history to be the Quba Mosque in present-day Medina since it was the first structure built by Muhammad upon his emigration from Mecca in 622. The Islamic Prophet Muhammad went on to another mosque in Medina. Built on the site of his home, Muhammad participated in the construction of the mosque himself and helped pioneer the concept of the mosque as the focal point of the Islamic city. The Masjid al-Nabawi introduced some of the still common in todays mosques, including the niche at the front of the prayer space known as the mihrab. The Masjid al-Nabawi was also constructed with a courtyard, a motif common among mosques built since then. Mosques had been built in Iraq and North Africa by the end of the 7th century, the Imam Husayn Shrine in Karbala is reportedly one of the oldest mosques in Iraq, although its present form – typical of Persian architecture – only goes back to the 11th century. The shrine, while operating as a mosque, remains one of the holiest sites for Shia Muslims, as it honors the death of the third Shia imam. The Mosque of Amr ibn al-As was reportedly the first mosque in Egypt, serving as a religious, like the Imam Husayn Shrine, though, nothing of its original structure remains. With the later Shia Fatimid Caliphate, mosques throughout Egypt evolved to include schools, hospitals and it was the first to incorporate a square minaret and includes naves akin to a basilica. Those features can also be found in Andalusian mosques, including the Grand Mosque of Cordoba, still, some elements of Visigothic architecture, like horseshoe arches, were infused into the mosque architecture of Spain and the Maghreb. The first mosque in East Asia was reportedly established in the 8th century in Xian, however, the Great Mosque of Xian, whose current building dates from the 18th century, does not replicate the features often associated with mosques elsewhere. Indeed, minarets were initially prohibited by the state, mosques in western China were more likely to incorporate elements, like domes and minarets, traditionally seen in mosques elsewhere. In turn, the Javanese style influenced the styles of mosques in Indonesias Austronesian neighbors—Malaysia, Brunei, Muslim empires were instrumental in the evolution and spread of mosques. Although mosques were first established in India during the 7th century, reflecting their Timurid origins, Mughal-style mosques included onion domes, pointed arches, and elaborate circular minarets, features common in the Persian and Central Asian styles
9.
Pull-apart basin
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In geology, a basin is a region where subsidence generates accommodation space for the deposition of sediments. A pull-apart basin is a basin where two overlapping faults or a fault bend creates an area of crustal extension undergoing tension, which causes the basin to sink down. Frequently, the basins are rhombic or sigmoidal in shape, dimensionally, basins are limited to the distance between the faults and the length of overlap. Pull-apart basins are also referred to as overlapping-tension-zones, the inhomogeneity and structural complexity of continental crust causes faults to deviate from a straight course and frequently causes bends or step-overs in fault paths. Bends and step-overs of adjacent faults become favorable locations for extensional and compressional stress or transtension and transpression stress, pull-apart basins form in extensional to transtensional environments along fault bends or between two adjacent left-lateral faults or two right-lateral faults. The step-over or bend in the fault must be the direction as sense of motion on the fault otherwise the area will be subject to transpression. For example, two overlapping left lateral fault must have a left-step-over to create a pull-apart basin and this is illustrated in the accompanying figures. A regional strike slip fault is referred to as a principle displacement zone, connecting the tips of step over faults to the opposite fault are bounding basin sidewall faults. Recent sandbox models have shown that the geometry and evolution of pull-apart basins varies greatly in pure-strike slip situations versus transtensional settings, transtensional settings are believed to generate greater surface subsidence than pure-strike slip alone. Two famous localities for continental pull-apart basins are the Dead Sea, pull-apart basins are amenable to research because sediments deposited in the basin provide a timeline of activity along the fault. The Salton Trough is an active pull-apart located in a step-over between the dextral San Andreas Fault and the Imperial Fault, displacement on the fault is approximately 6 cm/yr. The current transtensional state generates normal growth faults and some strike slip motion, the growth faults in the region strike N15E, have steep dips, and vertical displacements of 1–4 mm/yr. Eight large slip events have occurred on these faults with throw ranging from 0. 2–1.0 meters, pull-apart basins represent an important exploration target for oil and gas, porphyry copper mineralisation, and geothermal fields. The Matzen fault system in the Matzen Oil field has been recast as extensional grabens produced by pull-apart basins, the Dead Sea has been studied extensively and thinning of the crust in pull-aparts may generate differential loading and instigate salt-diapirs to rise, a popular trap for hydrocarbons. Likewise intense deformation and rapid subsidence and deposition in pull-aparts creates numerous structural and stratigraphic traps, the shallow extensional regime of pull-apart basins also facilitates the emplacement of felsic intrusive rocks with high copper mineralisation. It is believed to be the structural control on the giant Escondida Deposit in Chile. Geothermal fields are located in pull-aparts in the reason due to the high heat flow associated with rising magmas
10.
Extensional tectonics
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Extensional tectonics is concerned with the structures formed, and the tectonic processes associated with, the stretching of the crust or lithosphere. The types of structure and the geometries formed depend on the amount of stretching involved. Stretching is generally measured using the parameter β, known as the beta factor where β = t 0 t 1 t 0 is the initial crustal thickness and it is also the equivalent of the strain parameter stretch. In areas of relatively low crustal stretching, the dominant structures are high to moderate angle normal faults, with associated half grabens and tilted fault blocks. In areas of crustal stretching, individual extensional faults may become rotated to too low a dip to remain active. Large displacements may juxtapose syntectonic sediments against metamorphic rocks of the mid to lower crust, in some cases the detachments are folded such that the metamorphic rocks are exposed within antiformal closures and these are known as metamorphic core complexes. Passive margins above a weak layer develop a set of extensional structures. Large listric regional faults are developed with rollover anticlines and related crestal collapse grabens, on some margins, such as the Niger Delta, large counter-regional faults are observed, dipping back towards the continent, forming large grabenal mini-basins with antithetic regional faults. Areas of extensional tectonics are associated with, Rifts are linear zones of localized crustal extension. They range in width from less than 100 km up to several hundred km, consisting of one or more normal faults. In individual rift segments one polarity normally dominates giving a half-graben geometry, other common geometries include metamorphic core complexes and tilted blocks. Examples of active continental rifts are the Baikal Rift Zone and the East African Rift, divergent plate boundaries are zones of active extension as the crust newly formed at the mid-ocean ridge system becomes involved in the opening process. Zones of thickened crust, such as those formed during continent-continent collision tend to spread laterally, after the collision has finished the zone of thickened crust generally undergoes gravitational collapse, often with the formation of very large extensional faults. Large-scale Devonian extension, for example, followed immediately after the end of the Caledonian orogeny particularly in East Greenland and western Norway. When a strike-slip fault is offset along strike such as to create a gap i. e. a left-stepping bend on a sinistral fault, such bends are known as releasing bends or extensional stepovers and often form pull-apart basins or rhombochasms. Back-arc basins form behind many subduction zones due to the effects of oceanic trench roll-back which leads to a zone of extension parallel to the island arc. A passive margin built out over a layer, such as an overpressured mudstone or salt. The inboard part of the prism is affected by extensional faulting
11.
North Anatolian Fault
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The North Anatolian Fault is an active right-lateral strike-slip fault in northern Anatolia which runs along the transform boundary between the Eurasian Plate and the Anatolian Plate. It runs about 20 km south of Istanbul, the North Anatolian Fault is similar in many ways to the San Andreas Fault in California. Both are continental transforms with similar lengths and slip rates, the Sea of Marmara near Istanbul is an extensional basin similar to the Salton Trough in California, where a releasing bend in the strike-slip system creates a pull-apart basin. Since the disastrous 1939 Erzincan earthquake, there have been seven earthquakes measuring over 7.0 in magnitude, seismologists studying this pattern believe that each earthquake may trigger the next. By analyzing the stresses along the fault caused by each large earthquake and it is thought that the chain is not complete, and that an earthquake will soon strike further west along the fault – perhaps near the heavily populated city of Istanbul
12.
Fault (geology)
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In geology, a fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of rock-mass movement. Large faults within the Earths crust result from the action of tectonic forces. Energy release associated with movement on active faults is the cause of most earthquakes. A fault plane is the plane that represents the surface of a fault. A fault trace or fault line is the intersection of a plane with the ground surface. A fault trace is also the line commonly plotted on maps to represent a fault. Since faults do not usually consist of a single, clean fracture, the two sides of a non-vertical fault are known as the hanging wall and footwall. By definition, the wall occurs above the fault plane. This terminology comes from mining, when working a tabular ore body, because of friction and the rigidity of rocks, they cannot glide or flow past each other easily, and occasionally all movement stops. A fault in ductile rocks can also release instantaneously when the rate is too great. The energy released by instantaneous strain-release causes earthquakes, a common phenomenon along transform boundaries, slip is defined as the relative movement of geological features present on either side of a fault plane, and is a displacement vector. A faults sense of slip is defined as the motion of the rock on each side of the fault with respect to the other side. In practice, it is only possible to find the slip direction of faults. Based on direction of slip, faults can be categorized as, strike-slip. Dip-slip, offset is predominantly vertical and/or perpendicular to the fault trace, oblique-slip, combining significant strike and dip slip. The fault surface is usually vertical and the footwall moves either left or right or laterally with very little vertical motion. Strike-slip faults with left-lateral motion are known as sinistral faults. Those with right-lateral motion are known as dextral faults
13.
Transform fault
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A transform fault or transform boundary, is a type of fault whose relative motion is predominantly horizontal, in either a sinistral or dextral direction. Furthermore, transform faults end abruptly and are connected on both ends to other faults, ridges, or subduction zones, Transform faults are the only type of strike-slip fault that can be classified as a plate boundary. The new class of faults, called transform faults, produce slip in the direction from what one would surmise from the standard interpretation of an offset geological feature. Slip along transform faults does not increase the distance between the ridges it separates, the distance remains constant in earthquakes because the ridges are spreading centers. This hypothesis was confirmed in a study of the fault plane solutions that showed the slip on transform faults points in the opposite direction than classical interpretation would suggest, Transform faults are closely related to transcurrent faults, and are commonly confused. In addition, transform faults have equal deformation across the fault line, while transcurrent faults have greater displacement in the middle of the fault zone. Finally, transform faults can form a plate boundary, while transcurrent faults cannot. The effect of a fault is to strain, which can be caused by compression, extension. Transform faults specifically relieve strain by transporting the strain between ridges or subduction zones, Transform faults also act as the plane of weakness allowing for the splitting in rift zones. Transform faults are commonly found linking segments of mid-oceanic ridges or spreading centres and these mid-oceanic ridges are where new seafloor is constantly created through the upwelling of new basaltic magma. With new seafloor being pushed and pulled out, the older seafloor slowly slides away from the mid-oceanic ridges toward the continents, although separated only by tens of kilometers, this separation between segments of the ridges causes portions of the seafloor to push past each other in opposing directions. This lateral movement of seafloors past each other is where transform faults are currently active, Transform faults move differently than a strike-slip fault at the mid-oceanic ridge. Evidence of this can be found in paleomagnetic striping on the seafloor, a paper written by Gerya theorizes that the creation of the transform faults between the ridges of the mid-oceanic ridge is attributed to rotated and stretched sections of the mid-oceanic ridge. This occurs over a period of time with the spreading center or ridge slowly deforming from a straight line to a curved line. Finally, fracturing along these planes forms transform faults, as this takes place, the fault changes from a normal fault with extensional stress to a strike slip fault with lateral stress. In the study done by Bonatti & Crane, peridotite and gabbro rocks were discovered in the edges of the transform ridges and these rocks are created deep inside the Earth’s mantle and then rapidly exhumed to the surface. This evidence helps to prove that new seafloor is being created at the mid-oceanic ridges, as previously stated, active transform faults are between two tectonic structures or faults. Fracture zones represent the active transform fault lines, which have since passed the active transform zone and are being pushed toward the continents
14.
Anatolian Plate
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The Anatolian Plate or the Turkish Plate is a continental tectonic plate comprising most of the Anatolia peninsula. To the east, the East Anatolian Fault, a left lateral transform fault, to the south and southwest is a convergent boundary with the African Plate. The northern edge is a boundary with the Eurasian Plate. Research indicates that the Anatolian Plate is rotating counterclockwise as it is being pushed west by the Arabian Plate, in some references, the Anatolian Plate is referred to as a block of continental crust still coupled to the Eurasian Plate. But studies of the North Anatolian Fault indicate that Anatolia is de-coupled from the Eurasian Plate and it is now being squeezed by the Arabian Plate from the east and forced toward the west as the Eurasian Plate to its north is blocking motion in that direction. The African Plate is subducting beneath the Anatolian Plate along the Cyprus and Hellenic Arcs offshore in the Mediterranean Sea
15.
Eurasian Plate
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It also includes oceanic crust extending westward to the Mid-Atlantic Ridge and northward to the Gakkel Ridge. The eastern side is a boundary with the North American Plate to the north and a boundary with the Philippine Sea Plate to the south, and possibly with the Okhotsk Plate and the Amurian Plate. The southerly side is a boundary with the African Plate to the west, the Arabian Plate in the middle, the westerly side is a divergent boundary with the North American Plate forming the northernmost part of the Mid-Atlantic Ridge, which is straddled by Iceland. The geodynamics of central Asia is dominated by the interaction between the Eurasian and Indian Plates, in this area, many subplates or crust blocks have been recognized, which form the Central Asian and the East Asian transit zones
16.
Istanbul
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Istanbul, historically known as Constantinople and Byzantium, is the most populous city in Turkey and the countrys economic, cultural, and historic center. Istanbul is a city in Eurasia, straddling the Bosphorus strait between the Sea of Marmara and the Black Sea. Its commercial and historical center lies on the European side and about a third of its population lives on the Asian side, the city is the administrative center of the Istanbul Metropolitan Municipality, both hosting a population of around 14.7 million residents. Istanbul is one of the worlds most populous cities and ranks as the worlds 7th-largest city proper, founded under the name of Byzantion on the Sarayburnu promontory around 660 BCE, the city developed to become one of the most significant in history. After its reestablishment as Constantinople in 330 CE, it served as a capital for almost 16 centuries, during the Roman and Byzantine, the Latin. Overlooked for the new capital Ankara during the period, the city has since regained much of its prominence. The population of the city has increased tenfold since the 1950s, as migrants from across Anatolia have moved in, arts, music, film, and cultural festivals were established at the end of the 20th century and continue to be hosted by the city today. Infrastructure improvements have produced a complex transportation network, considered a global city, Istanbul has one of the fastest-growing metropolitan economies in the world. It hosts the headquarters of many Turkish companies and media outlets and accounts for more than a quarter of the gross domestic product. Hoping to capitalize on its revitalization and rapid expansion, Istanbul has bid for the Summer Olympics five times in twenty years, the first known name of the city is Byzantium, the name given to it at its foundation by Megarean colonists around 660 BCE. The name is thought to be derived from a personal name, ancient Greek tradition refers to a legendary king of that name as the leader of the Greek colonists. Modern scholars have hypothesized that the name of Byzas was of local Thracian or Illyrian origin. He also attempted to promote the name Nova Roma and its Greek version Νέα Ῥώμη Nea Romē, the use of Constantinople to refer to the city during the Ottoman period is now considered politically incorrect, even if not historically inaccurate, by Turks. By the 19th century, the city had acquired other names used by foreigners or Turks. Europeans used Constantinople to refer to the whole of the city, pera was used to describe the area between the Golden Horn and the Bosphorus, but Turks also used the name Beyoğlu. The name İstanbul is commonly held to derive from the Medieval Greek phrase εἰς τὴν Πόλιν and this reflected its status as the only major city in the vicinity. The importance of Constantinople in the Ottoman world was reflected by its Ottoman name Der Saadet meaning the gate to Prosperity in Ottoman. An alternative view is that the name evolved directly from the name Constantinople, with the first, a Turkish folk etymology traces the name to Islam bol plenty of Islam because the city was called Islambol or Islambul as the capital of the Islamic Ottoman Empire
17.
Transtension
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Transtension is the state in which a rock mass or area of the Earths crust experiences both extensive and transtensive shear. As such, transtensional regions are characterised by both extensional structures and wrench structures, in general, many tectonic regimes that were previously defined as simple strike-slip shear zones are actually transtensional. It is unlikely that a body will experience pure extension or pure strike-slip. Transtensional shear zones are characterized by the co-existence of different structures, end member structures include pure strike-slip faults and purely extensional dip-slip faults. Faults which have components of both are abundant, releasing bends are transtensional structures that form where the orientation of a strike-slip fault becomes oblique to the regional slip vector causing local extension. They also form where two segments of a strike-slip fault overlap, and the zone between the segments experiences transtension. Releasing bends often form negative flower structures or pull-apart basins, dead Sea Salton Sea Sea of Marmara on the North Anatolian Fault Vienna Basin Rift Strike-slip tectonics Structural geology Transpression
18.
Fatih Mosque, Istanbul
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The Fatih Mosque is an Ottoman mosque in the Fatih district of Istanbul, Turkey. The original mosque on the site was constructed between 1463 to 1470 and it was seriously damaged in the 1766 earthquake and was rebuilt in 1771 to a different design. It is one of the largest examples of Turkish-Islamic architecture in Istanbul and it is named after Ottoman sultan Mehmed the Conqueror, known in Turkish as Fatih Sultan Mehmed, the Ottoman sultan who conquered Constantinople in 1453. The Fatih mosque complex was a religious and social building of unprecedented size and it was built by the Greek architect Atik Sinan. The Fatih mosque was the first monumental project in the Ottoman imperial architectural tradition, the original complex included a set of well-planned buildings constructed around the mosque. They include eight medrese, library, hospital, hospice, caravanserai, market, hamam, primary school, various türbe were added at a later dates. The original complex covered an almost square area 325 metres on a side, the original mosque was badly damaged in the 1509 earthquake, after that it was repaired, but was then damaged again by earthquakes in 1557 and 1754 and repaired yet again. It was then destroyed by an earthquake on 22 May 1766 when the main dome collapsed. The current mosque was completed in 1771 under Sultan Mustafa III by the architect, the first Fatih mosque had one central dome supported by a single semi-dome of the same diameter on the qibla side and suspended on four arches, its dome was 26 meter in diameter. The second mosque which was built by Sultan Mustafa III after the 1766 earthquake, was built on a square plan and it has one central dome supported by four semi-domes. The courtyard, main portal and lower portions of the minarets remain from the original construction. The present interior of the Fatih Mosque is essentially a copy of earlier designs invented by Sinan re-used repeatedly by himself, the 26 meter diameter center dome is supported by four semi-domes on each axis supported by four large marble columns. There are two each with twin galleries. The mihrab dates from the original construction, as with other imperial mosques in Istanbul, the Fatih Mosque was designed as a kulliye, or complex with adjacent structures to service both religious and cultural needs. To the north and south of the mosque are the Sahn-ı Seman, eight great medrese and these buildings are symmetrical, and each contains 18 cells for students and a dershane. Behind each was an annex, about half as large as the medrese itself, the medreses provided for about a thousand students, making it a large university for its time. The Hospice is outside the southeast corner of the mosque precincts, the building has a beautiful courtyard supported by 16 exceptional columns of verd antique and granite, which were probably salvaged from the Church of the Holy Apostles. Opposite the hospice is the large türbe of Sultan Mahmud IIs mother, in the graveyard on the kiblah side behind the mosque are the türbe of Sultan Mehmet II and his wife Gulbahar Hatun
19.
Galata
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Galata was a neighbourhood opposite Constantinople, located at the northern shore of the Golden Horn, the inlet which separates it from the historic peninsula of old Constantinople. The Golden Horn is crossed by bridges, most notably the Galata Bridge. The medieval citadel of Galata was a colony of the Republic of Genoa between 1273 and 1453, the famous Galata Tower was built by the Genoese in 1348 at the northernmost and highest point of the citadel. At present, Galata is a quarter within the borough of Beyoğlu in Istanbul, there are several theories concerning the origin of the name Galata. In historic documents, Galata is often called Pera, which comes from the old Greek name for the place, Peran en Sykais, the quarter first appears in Late Antiquity as Sykai or Sycae. By the time the Notitia Urbis Constantinopolitanae was compiled in ca.425 AD, according to the Notitia, it featured public baths and a forum built by Emperor Honorius, a theatre, a porticoed street and 435 mansions. It is also probable that the settlement was enclosed by walls in the 5th century, Sykai received full city rights under Justinian I, who renamed it Iustinianopolis, but declined and was probably abandoned in the 7th century. Only the large tower, Megalos Pyrgos which controlled the northern end of the sea chain that blocked the entrance to the Golden Horn remained, in the 11th century, the quarter housed the citys Jewish community, which came to number some 2,500 people. In 1171, a new Genoese settlement in the area was attacked, the kastellion and the Jewish quarter were seized and destroyed in 1203 by the Catholic crusaders during the Fourth Crusade, shortly before the sack of Constantinople. In 1233, during the subsequent Latin Empire, a small Catholic chapel dedicated to St. Paul was built in place of a 6th-century Byzantine church in Galata. In 1407, Pope Gregory XII, in order to ensure the maintenance of the church, in 1261, the quarter was retaken by the Byzantines, but Emperor Michael VIII Palaiologos granted it to the Genoese in 1267 in accordance with the Treaty of Nymphaeum. The precise limits of the Genoese colony were stipulated in 1303, the Genoese however disregarded this, and through subsequent expansions of the walls, enlarged the area of their settlement. At present, only a portion of the Genoese walls are still standing. Bankalar Caddesi has rows of Ottoman-era bank buildings, including the headquarters of the Ottoman Central Bank, several ornaments that were originally on the facade of the Genoese Palace were used to embellish these 19th-century bank buildings in the late Ottoman period. The seaside mansion of the Camondo family, popularly known as the Camondo Palace, was built between 1865 and 1869 and designed by architect Sarkis Balyan and it is located on the northern shore of the Golden Horn, within the nearby Kasımpaşa quarter to the west of Galata. It later became the headquarters of the Ministry of the Navy during the late Ottoman period, Galatasaray S. K. Galatasaray literally means Galata Palace. La Géographie Ecclésiastique de lEmpire Byzantin, part, Le Siège de Constantinople et le Patriarcat Oecuménique. 3rd Vol. Les Églises et les Monastères, petite Guide a travers les Monuments Byzantins et Turcs
20.
Bayezid II Mosque
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The Bayezid II Mosque is an Ottoman imperial mosque located in the Beyazıt Square area of Istanbul, Turkey, near the ruins of the Forum of Theodosius of ancient Constantinople. The Beyazidiye Camii was commissioned by Ottoman Sultan Bayezid II, and was the large imperial mosque complex to be erected in Istanbul after the conquest. That the architect was a nephew of the Greek architect of the Fatih Mosque, is known from a grant of Bayazid II, the surrounding külliye complex, date from 1501 to 1506. The dome was rebuilt after an earthquake in 1509. The minarets burned separately in 1683 and 1764, an inscription above the courtyard entrance suggests that repairs were also conducted in 1767. The mosque is oriented along the northwest-southeast axis with a courtyard to the northwest with an area almost equal to that of the mosque itself, the courtyard has monumental entrance portals on each side. The mosque itself is approximately 40 metres square, with a 17-metre diameter dome, the design is that of a central dome held by semi-domes on all four sides. The mosque is constructed entirely of cut stone appropriating colored stones and marbles appropriated from nearby Byzantine ruins, the interior of the mosque is patterned after the Hagia Sophia on a smaller scale. The dome is supported by rectangular piers, with smooth pendentives. The space is lit with twenty windows at the base of the dome and seven windows on each semi-dome, on the west side, a broad extended corridor extends considerable beyond the main structure of the building. At the ends of wings are the two minarets. Behind the mosque is a garden, containing the türbe of Sultan Bayezid II, his daughter Selçuk Hatun. Below the garden is an arcade of shops whose rents were intended to support the mosque. This arcade was designed by Mimar Sinan in 1580 and extensively restored in the 1960s, the former public kitchens of the mosque was converted into the State Library of Istanbul by Sultan Abdulhamid II in 1882 and houses over 120,000 books and 7000 manuscripts. Likewise, the former madrasah now houses the Istanbul Municipal Library, Ottoman architecture Islamic architecture List of mosques Freely, John
21.
Minaret
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A minaret, from Arabic, منارة manāra, lit. lighthouse, also known as Goldaste, is a distinctive architectural structure akin to a tower and typically found adjacent to mosques. Generally a tall spire with a conical or onion-shaped crown, usually either free-standing or taller than associated support structure, the basic form of a minaret includes a base, shaft, and gallery. Styles vary regionally and by period, minarets provide a visual focal point and are traditionally used for the Muslim call to prayer. The purpose of minarets in traditional Eastern region architecture is to serve as a system for a building in very hot climates. That buildings of middle eastern origins have such outstanding features is architecturally intentional, however in modern times, with the invention of the modern air conditioners, the purpose of minarets has changed to traditional symbol. The minaret would be equipped with a speaker that would call people to prayers in Muslim countries. In addition to providing a visual cue to a Muslim community, the call to prayer is issued five times each day, dawn, noon, mid-afternoon, sunset, and night. In most modern mosques, the adhān is called from the musallah via microphone to a system on the minaret. Around 80 years after Muhammads death, the first known minarets appeared, minarets have been described as the gate from heaven and earth, and as the Arabic language letter aleph. The massive minaret of the Great Mosque of Kairouan in Tunisia is the oldest standing minaret and its construction began during the first third of the 8th century and was completed in 836 CE. The imposing square-plan tower consists of three sections of decreasing size reaching 31.5 meters, considered as the prototype for minarets of the western Islamic world, it served as a model for many later minarets. The tallest minaret, at 210 metres is located at the Hassan II Mosque in Casablanca, the tallest brick minaret is Qutub Minar located in Delhi, India. In some of the oldest mosques, such as the Great Mosque of Damascus, the basic form of minarets consists of three parts, a base, shaft, and a gallery. For the base, the ground is excavated until a foundation is reached. Gravel and other supporting materials may be used as a foundation, minarets may be conical, square, cylindrical, or polygonal. Stairs circle the shaft in a fashion, providing necessary structural support to the highly elongated shaft. The gallery is a balcony that encircles the upper sections from which the muezzin may give the call to prayer, styles and architecture can vary widely according to region and time period. Here are a few styles and the localities from which they derive, Tunisia Quadrangular, turkish 1,2,4 or 6 minarets related to the size of the mosque
22.
Hagia Sophia
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Hagia Sophia was a Greek Orthodox Christian patriarchal basilica, later an imperial mosque, and now a museum in Istanbul, Turkey. The building was converted into an Ottoman mosque from 29 May 1453 until 1931. It was then secularized and opened as a museum on 1 February 1935, famous in particular for its massive dome, it is considered the epitome of Byzantine architecture and is said to have changed the history of architecture. It remained the worlds largest cathedral for nearly a thousand years and it was designed by the Greek geometers Isidore of Miletus and Anthemius of Tralles. The church contained a collection of relics and featured, among other things. In 1453, Constantinople was conquered by the Ottoman Empire under Mehmed the Conqueror, by that point, the church had fallen into a state of disrepair. Nevertheless, the Christian cathedral made an impression on the new Ottoman rulers. Islamic features—such as the mihrab, minbar, and four minarets—were added and it remained a mosque until 1931, when it was closed to the public for four years. It was re-opened in 1935 as a museum by the Republic of Turkey, Hagia Sophia was, as of 2014, the second-most visited museum in Turkey, attracting almost 3.3 million visitors annually. According to data released by the Turkish Culture and Tourism Ministry, from its initial conversion until the construction of the nearby Sultan Ahmed Mosque in 1616, it was the principal mosque of Istanbul. The first church on the site was known as the Μεγάλη Ἐκκλησία, or in Latin Magna Ecclesia, inaugurated on 15 February 360 by the Arian bishop Eudoxius of Antioch, it was built next to the area where the imperial palace was being developed. The nearby Hagia Eirene church was completed earlier and served as cathedral until the Great Church was completed, both churches acted together as the principal churches of the Byzantine Empire. Writing in 440, Socrates of Constantinople claimed that the church was built by Constantius II, a tradition which is not older than the 7th or 8th century, reports that the edifice was built by Constantine the Great. Zonaras reconciles the two opinions, writing that Constantius had repaired the edifice consecrated by Eusebius of Nicomedia, after it had collapsed. Since Eusebius was bishop of Constantinople from 339 to 341, and Constantine died in 337, the edifice was built as a traditional Latin colonnaded basilica with galleries and a wooden roof. It was preceded by an atrium and it was claimed to be one of the worlds most outstanding monuments at the time. The Patriarch of Constantinople John Chrysostom came into a conflict with Empress Aelia Eudoxia, wife of the emperor Arcadius, during the subsequent riots, this first church was largely burned down. Nothing remains of the first church today, a second church on the site was ordered by Theodosius II, who inaugurated it on 10 October 415
23.
Byzantine Empire
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It survived the fragmentation and fall of the Western Roman Empire in the 5th century AD and continued to exist for an additional thousand years until it fell to the Ottoman Turks in 1453. During most of its existence, the empire was the most powerful economic, cultural, several signal events from the 4th to 6th centuries mark the period of transition during which the Roman Empires Greek East and Latin West divided. Constantine I reorganised the empire, made Constantinople the new capital, under Theodosius I, Christianity became the Empires official state religion and other religious practices were proscribed. Finally, under the reign of Heraclius, the Empires military, the borders of the Empire evolved significantly over its existence, as it went through several cycles of decline and recovery. During the reign of Maurice, the Empires eastern frontier was expanded, in a matter of years the Empire lost its richest provinces, Egypt and Syria, to the Arabs. This battle opened the way for the Turks to settle in Anatolia, the Empire recovered again during the Komnenian restoration, such that by the 12th century Constantinople was the largest and wealthiest European city. Despite the eventual recovery of Constantinople in 1261, the Byzantine Empire remained only one of several small states in the area for the final two centuries of its existence. Its remaining territories were annexed by the Ottomans over the 15th century. The Fall of Constantinople to the Ottoman Empire in 1453 finally ended the Byzantine Empire, the term comes from Byzantium, the name of the city of Constantinople before it became Constantines capital. This older name of the city would rarely be used from this point onward except in historical or poetic contexts. The publication in 1648 of the Byzantine du Louvre, and in 1680 of Du Canges Historia Byzantina further popularised the use of Byzantine among French authors, however, it was not until the mid-19th century that the term came into general use in the Western world. The Byzantine Empire was known to its inhabitants as the Roman Empire, the Empire of the Romans, Romania, the Roman Republic, Graikia, and also as Rhōmais. The inhabitants called themselves Romaioi and Graikoi, and even as late as the 19th century Greeks typically referred to modern Greek as Romaika and Graikika. The authority of the Byzantine emperor as the legitimate Roman emperor was challenged by the coronation of Charlemagne as Imperator Augustus by Pope Leo III in the year 800. No such distinction existed in the Islamic and Slavic worlds, where the Empire was more seen as the continuation of the Roman Empire. In the Islamic world, the Roman Empire was known primarily as Rûm, the Roman army succeeded in conquering many territories covering the entire Mediterranean region and coastal regions in southwestern Europe and north Africa. These territories were home to different cultural groups, both urban populations and rural populations. The West also suffered heavily from the instability of the 3rd century AD
24.
Mosaic
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A mosaic is a piece of art or image made from the assemblage of small pieces of colored glass, stone, or other materials. It is often used in art or as interior decoration. Most mosaics are made of small, flat, roughly square, pieces of stone or glass of different colors, some, especially floor mosaics, are made of small rounded pieces of stone, and called pebble mosaics. Others are made of other materials, mosaics have a long history, starting in Mesopotamia in the 3rd millennium BC. Pebble mosaics were made in Tiryns in Mycenean Greece, mosaics with patterns and pictures became widespread in classical times, Early Christian basilicas from the 4th century onwards were decorated with wall and ceiling mosaics. Mosaic fell out of fashion in the Renaissance, though artists like Raphael continued to practise the old technique, Roman and Byzantine influence led Jews to decorate 5th and 6th century synagogues in the Middle East with floor mosaics. Mosaic was widely used on buildings and palaces in early Islamic art, including Islams first great religious building, the Dome of the Rock in Jerusalem. Mosaic went out of fashion in the Islamic world after the 8th century, modern mosaics are made by professional artists, street artists, and as a popular craft. Many materials other than stone and ceramic tesserae may be employed, including shells, glass. The earliest known examples of made of different materials were found at a temple building in Abra, Mesopotamia. They consist of pieces of colored stones, shells and ivory, excavations at Susa and Chogha Zanbil show evidence of the first glazed tiles, dating from around 1500 BC. However, mosaic patterns were not used until the times of Sassanid Empire, mythological subjects, or scenes of hunting or other pursuits of the wealthy, were popular as the centrepieces of a larger geometric design, with strongly emphasized borders. Pliny the Elder mentions the artist Sosus of Pergamon by name, describing his mosaics of the left on a floor after a feast. Both of these themes were widely copied, most recorded names of Roman mosaic workers are Greek, suggesting they dominated high quality work across the empire, no doubt most ordinary craftsmen were slaves. Splendid mosaic floors are found in Roman villas across North Africa, in such as Carthage. The tiny tesserae allowed very fine detail, and an approach to the illusionism of painting, often small panels called emblemata were inserted into walls or as the highlights of larger floor-mosaics in coarser work. The normal technique was opus tessellatum, using larger tesserae, which was laid on site, there was a distinct native Italian style using black on a white background, which was no doubt cheaper than fully coloured work. In Rome, Nero and his architects used mosaics to cover surfaces of walls and ceilings in the Domus Aurea, built 64 AD
25.
Ottoman dynasty
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The Ottoman dynasty was made up of the members of the imperial House of Osman. According to Ottoman tradition, the family originated from the Kayı tribe branch of the Oghuz Turks, the Ottoman dynasty, named after Osman I, ruled the Ottoman Empire from c.1299 to 1922. During much of the Empires history, the sultan was the regent, head of state. The imperial family was deposed from power and the sultanate was abolished on 1 November 1922 after the Turkish War of Independence, the Republic of Turkey was declared the following year. The living members of the dynasty were sent into exile as persona non gratae, though some have been allowed to return. In its current form, the family is known as the Osmanoğlu family, before Orhans proclamation of the dynasty, the tribe was known as the Bilecik Söğüt Beylik or Beys but was renamed Osmanlı in honor of Osman. The Ottoman dynasty is known in modern Turkish as Osmanlı Hanedanı, meaning House of Osman, in Ottoman Turkish it was known as Hanedan-ı Âl-i Osman, thus they still formally acknowledged the sovereignty of the Seljuk Empire and its successor, the Seljuk Sultanate of Rûm. The first Ottoman ruler to claim the title of Sultan was Murad I. The holder of the title Sultan was in Arabic-Islamic dynasties originally the power behind the throne of the Caliph in Bagdad, the Ottoman sultans also claimed the title of Caliph starting with Murad I, who transformed the Ottoman state into a transcontinental empire. With the Conquest of Constantinople in 1453, Sultan Mehmed II Fatih claimed the title Kaysar-i-Rûm Emperor of Rome and he appointed the Patriarch of Constantinople Gennadius Scholarius, whom he protected and whose status he elevated into leader of all the Eastern Orthodox Christians. As Emperor of Rome he laid claim to all Roman territories, Sultan Mehmed II also took the title of Padishah, a Persian title meaning Master of Kings and ranking as Emperor, claiming superiority among the other kings. He was the first Ottoman ruler to adopt the title of Padishah. The Ottoman claim to caliphate was strengthened when they defeated the Mamluks in 1517, as the empire grew, sultans adopted secondary titles expressing the empires claim to be the legitimate successor of the absorbed states. Furthermore, they tended to enumerate even regular provinces, not unlike the long lists of -mainly inherited- feudal titles in the style of many Christian European monarchs. Some early Ottoman Sultans even had to accept the status in the eyes of a foreign overlord. However, the Ottoman Caliphate too was abolished soon afterwards, and Abdulmecid II was utterly deposed and expelled from Turkey with the rest of the Ottoman dynasty on 3 March 1924
26.
Turbidite
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A turbidite is the geologic deposit of a turbidity current, which is a type of sediment gravity flow responsible for distributing vast amounts of clastic sediment into the deep ocean. Turbidites were first properly described by Arnold H and this vertical succession of sedimentary structures, bedding, and changing lithology is representative of strong to waning flow regime currents and their corresponding sedimentation. It is unusual to see all of a complete Bouma cycle and it is now recognized that the vertical progression of sedimentary structures described by Bouma applies to turbidites deposited by low-density turbidity currents. As the sand concentration of a flow increases, grain-to-grain collisions within the turbid suspension create dispersive pressures that become important in hindering further settling of grains, as a consequence, a slightly different set of sedimentary structures develops in turbidites deposited by high-density turbidity currents. This different set of structures is known as the Lowe sequence, which is a classification that complements, but does not replace. Turbidites are sediments which are transported and deposited by density flow, the distinction is that, in a normal river or stream bed, particles of rock are carried along by frictional drag of water on the particle. The water must be travelling at a velocity in order to suspend the particle in the water. The greater the size or density of the relative to the fluid in which it is travelling. Density based flow, however, occurs when liquefaction of sediment during transport causes a change to the density of the fluid and this is usually achieved by highly turbulent liquids which have a suspended load of fine grained particles forming a slurry. In this case, larger fragments of rock can be transported at water velocities too low to otherwise do so because of the density contrast. This condition occurs in many environments aside from simply the deep ocean, turbidites in sediments can occur in carbonate as well as siliciclastic sequences. A different vertical progression of sedimentary structures characterize high-density turbidites, massive accumulations of turbidites and other deep water deposits may result in the formation of submarine fans. Density currents may be triggered in areas of sediment supply by gravitational failure alone. Turbidites can represent a high record of seismicity, and terrestrial storm/flood events depending on the connectivity of canyon/channel systems to terrestrial sediment sources. Proterozoic gold deposits are known from turbidite basin deposits. Turbidite deposits typically occur in foreland basins, the Encyclopedia of Oceanography, Encyclopedia of earth sciences series 1, Van Nostrand Reinhold Company, New York, p. 945–946. Morey, A. Johnson, J. E. Gutierrez-Pastor, J. Eriksson, mutti, E. & Ricci Lucci, F. Turbidite facies and facies associations. In, Examples of turbidite facies and associations from selected formations of the northern Apennines, congress of Sedimentology, Field Trip A-11, p. 21–36
27.
Geophysical Journal International
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The journal published original research papers, research notes, letters, and book reviews. The journal covers research on all aspects of geophysics, including planetary science, the journal was formerly entitled Geophysical Journal from January 1988 to June 1989. Geophysical Journal of the Royal Astronomical Society was in existence from March 1958 to December 1987 and was preceded by Monthly Notices of the Royal Astronomical Society, the Journal of Geophysics was in existence from 1974 to 1987, and preceded by the German-language journal, Zeitschrift für Geophysik. Finally, Annales Geophysicae, Series B, Terrestrial and Planetary Physics was in existence from 1986 to 1987, Annales Geophysicae was formed by the merger of two other journals, Annales de Geophysique, and Annali di Geofisica
28.
Seismological Society of America
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The Seismological Society of America is an international scientific society devoted to the advancement of seismology and the understanding of earthquakes for the benefit of society. Founded in 1906, the society has members throughout the world representing seismologists and other geophysicists, geologists, engineers, insurers, the society hosts an annual meeting every April. The meeting is open to anyone, SSA members receive a discount on their meeting registration. The Eastern Section of SSA hosts a meeting each fall. American Geological Institute Geological Society of America IRIS Consortium List of geoscience organizations Sources SSA official website
29.
AD 17 Lydia earthquake
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The AD17 Lydia earthquake caused the destruction of at least twelve cities in the region of Lydia in the Roman province of Asia in Asia Minor. The earthquake was recorded by the Roman historians Tacitus and Pliny the Elder, Pliny called it the greatest earthquake in human memory. The city of Sardis, the capital of the Lydian Empire, was the most affected. Of these, Pergamon, Ephesus and Kibyra are not mentioned by Tacitus, the record of damage at both Ephesus and Kibyra may refer instead to an earthquake in AD23. In Pergamon the Heroon of Diodoros Pasparos was remodelled after the earthquake, there are very few extant details for this earthquake. It is known that it occurred during the night, in AD17, a variety of epicenters have been used in catalogues, near Ephesus in the NGDC database, at Sardis in the CFTI4MED database and near Magnesia in the IISEE catalogue. The Roman Emperor, Tiberius, agreed to all taxes due from Sardis. He further sent Sardis ten million sesterces and appointed Marcus Aletius, two additional figures were added later, representing Kibyra and Ephesus as they had also received aid from Tiberius. A copy of this statue, with the transferred to a frieze around the base, was erected in Puteoli where it can still be seen. A statue was raised in Tiberius honour at Sardis in AD43, another incomplete inscription, found at Sardis, is thought to have been a copy of a formal document from the cities to the emperor expressing their gratitude. The surviving part includes signatories from representatives of eight of the cities, commemorative coins were struck in AD 22–23 in Rome, showing Tiberius with the inscription CIVITATIBVS ASIAE RESTITVTIS or cities of Asia restored. Provincial coins were struck, including one from the city of Magnesia. Some of the changed their names in honour of the emperor. Hierapolis became Hierocaesarea, Kibyra added Caesarea after its name, Philadelphia was renamed Neocaesarea, List of earthquakes in Turkey List of historical earthquakes
30.
1881 Chios earthquake
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The 1881 Chios earthquake occurred at 11,30 UTC on 3 April. It caused severe damage on the island of Chios and also affected Çeşme, the earthquake had an estimated magnitude of 7.3 and there were an estimated 7,866 casualties. The devastation from the earthquake was the last of the three catastrophes that affected the island of Chios in the 19th century, the Aegean Sea is an area of mainly extensional tectonics caused by the subduction of the African Plate beneath Aegean Sea Plate. The town of Chios was devastated, causing casualties, partly due to the narrowness of the streets. In the rest of the island,25 out of the 64 villages were destroyed with another 17 badly damaged, in both Çeşme and Alaçatı about 40% of the houses were destroyed. The number of casualties on the Turkish mainland was low, possibly due to most of the inhabitants leaving their houses to watch the passage of the passenger ship Aya Evangelistra from the shore. The epicenter of the earthquake was in the part of Chios where intensities reached IX on the Mercalli intensity scale. Isoseismal maps show an elongation west to east with an area of intensity VIII affecting the end of the Karaburun Peninsula of the Turkish mainland. Vertical movements of up to 2.5 m were observed, magnitudes ranging from Mw =6.5 to Ms=7.3 have been estimated for this event. A minor tsunami was reported, based on the presence of sand in a garden in Chios. There were many aftershocks, the most damaging being on 5 April,11 April,12 April,13 April,18 April,20 May,9 June and 26 August. After the earthquake many of the inhabitants of Chios left the island and this followed the trend set by the other two catastrophes of the 19th century that devastated the island, the massacre of Chios in 1822 and the failure of the orange crop in 1833. Together these events left most of Chios in a state of poverty, List of earthquakes in Greece List of historical earthquakes
