141-589: Göbekli Tepe ( Turkish: [ɟœbecˈli teˈpe] , ' Potbelly Hill ' ; Kurdish : Girê Mirazan or Xerabreşkê , 'Wish Hill') is a Neolithic archaeological site in the Southeastern Anatolia Region of Turkey. The settlement was inhabited from around 9500 BCE to at least 8000 BCE , during the Pre-Pottery Neolithic . It is famous for its large circular structures that contain massive stone pillars – among
282-455: A Mohs hardness of 2 to 4, dense limestone can have a crushing strength of up to 180 MPa . For comparison, concrete typically has a crushing strength of about 40 MPa. Although limestones show little variability in mineral composition, they show great diversity in texture. However, most limestone consists of sand-sized grains in a carbonate mud matrix. Because limestones are often of biological origin and are usually composed of sediment that
423-457: A bloom of cyanobacteria or microalgae . However, stable isotope ratios in modern carbonate mud appear to be inconsistent with either of these mechanisms, and abrasion of carbonate grains in high-energy environments has been put forward as a third possibility. Formation of limestone has likely been dominated by biological processes throughout the Phanerozoic , the last 540 million years of
564-411: A PPNA site. Schmidt's team explained the discrepancy in light of their theory that this material was brought to the site from elsewhere when it was abandoned, and so was not representative of the actual use of the structures. They instead turned to a novel method of dating organic material preserved in the plaster on the structure's walls, which resulted in dates more consistent with a PPNA occupation, in
705-434: A carbonate rock outcrop can be estimated in the field by etching the surface with dilute hydrochloric acid. This etches away the calcite and aragonite, leaving behind any silica or dolomite grains. The latter can be identified by their rhombohedral shape. Crystals of calcite, quartz , dolomite or barite may line small cavities ( vugs ) in the rock. Vugs are a form of secondary porosity, formed in existing limestone by
846-612: A central quartz grain or carbonate mineral fragment. These likely form by direct precipitation of calcium carbonate onto the ooid. Pisoliths are similar to ooids, but they are larger than 2 mm in diameter and tend to be more irregular in shape. Limestone composed mostly of ooids is called an oolite or sometimes an oolitic limestone . Ooids form in high-energy environments, such as the Bahama platform, and oolites typically show crossbedding and other features associated with deposition in strong currents. Oncoliths resemble ooids but show
987-449: A change in environment that increases the solubility of calcite. Dense, massive limestone is sometimes described as "marble". For example, the famous Portoro "marble" of Italy is actually a dense black limestone. True marble is produced by recrystallization of limestone during regional metamorphism that accompanies the mountain building process ( orogeny ). It is distinguished from dense limestone by its coarse crystalline texture and
1128-949: A composition reflecting the organisms that produced them and the environment in which they were produced. Low-magnesium calcite skeletal grains are typical of articulate brachiopods , planktonic (free-floating) foraminifera, and coccoliths . High-magnesium calcite skeletal grains are typical of benthic (bottom-dwelling) foraminifera, echinoderms , and coralline algae . Aragonite skeletal grains are typical of molluscs , calcareous green algae , stromatoporoids , corals , and tube worms . The skeletal grains also reflect specific geological periods and environments. For example, coral grains are more common in high-energy environments (characterized by strong currents and turbulence) while bryozoan grains are more common in low-energy environments (characterized by quiet water). Ooids (sometimes called ooliths) are sand-sized grains (less than 2mm in diameter) consisting of one or more layers of calcite or aragonite around
1269-412: A considerable fraction of the limestone bed. At depths greater than 1 km (0.62 miles), burial cementation completes the lithification process. Burial cementation does not produce stylolites. When overlying beds are eroded, bringing limestone closer to the surface, the final stage of diagenesis takes place. This produces secondary porosity as some of the cement is dissolved by rainwater infiltrating
1410-478: A dialect of Southern Kurdish or as a fourth language under Kurdish is a matter of debate, but the differences between Laki and other Southern Kurdish dialects are minimal. The literary output in Kurdish was mostly confined to poetry until the early 20th century, when more general literature became developed. Today, the two principal written Kurdish dialects are Kurmanji and Sorani. Sorani is, along with Arabic , one of
1551-483: A drop of dilute hydrochloric acid is dropped on it. Dolomite is also soft but reacts only feebly with dilute hydrochloric acid, and it usually weathers to a characteristic dull yellow-brown color due to the presence of ferrous iron. This is released and oxidized as the dolomite weathers. Impurities (such as clay , sand, organic remains, iron oxide , and other materials) will cause limestones to exhibit different colors, especially with weathered surfaces. The makeup of
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#17328558276871692-621: A few million years, as this is the most stable form of calcium carbonate. Ancient carbonate formations of the Precambrian and Paleozoic contain abundant dolomite, but limestone dominates the carbonate beds of the Mesozoic and Cenozoic . Modern dolomite is quite rare. There is evidence that, while the modern ocean favors precipitation of aragonite, the oceans of the Paleozoic and middle to late Cenozoic favored precipitation of calcite. This may indicate
1833-455: A few thousand years. As rainwater mixes with groundwater, aragonite and high-magnesium calcite are converted to low-calcium calcite. Cementing of thick carbonate deposits by rainwater may commence even before the retreat of the sea, as rainwater can infiltrate over 100 km (60 miles) into sediments beneath the continental shelf. As carbonate sediments are increasingly deeply buried under younger sediments, chemical and mechanical compaction of
1974-524: A fully articulated belief in deities as not developing until later, in Mesopotamia , that was associated with extensive temples and palaces. This corresponds well with an ancient Sumerian belief that agriculture, animal husbandry , and weaving were brought to humans from the sacred mountain Ekur , which was inhabited by Annuna deities, very ancient deities without individual names. Schmidt identified this story as
2115-490: A high percentage of the mineral dolomite , CaMg(CO 3 ) 2 . Magnesian limestone is an obsolete and poorly-defined term used variously for dolomite, for limestone containing significant dolomite ( dolomitic limestone ), or for any other limestone containing a significant percentage of magnesium . Most limestone was formed in shallow marine environments, such as continental shelves or platforms , though smaller amounts were formed in many other environments. Much dolomite
2256-435: A limestone sample except in thin section and are less common in ancient limestones, possibly because compaction of carbonate sediments disrupts them. Limeclasts are fragments of existing limestone or partially lithified carbonate sediments. Intraclasts are limeclasts that originate close to where they are deposited in limestone, while extraclasts come from outside the depositional area. Intraclasts include grapestone , which
2397-466: A lower Mg/Ca ratio in the ocean water of those times. This magnesium depletion may be a consequence of more rapid sea floor spreading , which removes magnesium from ocean water. The modern ocean and the ocean of the Mesozoic have been described as "aragonite seas". Most limestone was formed in shallow marine environments, such as continental shelves or platforms . Such environments form only about 5% of
2538-525: A lower diversity of organisms and a greater fraction of silica and clay minerals characteristic of marls . The Green River Formation is an example of a prominent freshwater sedimentary formation containing numerous limestone beds. Freshwater limestone is typically micritic. Fossils of charophyte (stonewort), a form of freshwater green algae, are characteristic of these environments, where the charophytes produce and trap carbonates. Limestones may also form in evaporite depositional environments . Calcite
2679-523: A mechanism for dolomitization, with one 2004 review paper describing it bluntly as "a myth". Ordinary seawater is capable of converting calcite to dolomite, if the seawater is regularly flushed through the rock, as by the ebb and flow of tides (tidal pumping). Once dolomitization begins, it proceeds rapidly, so that there is very little carbonate rock containing mixed calcite and dolomite. Carbonate rock tends to be either almost all calcite/aragonite or almost all dolomite. About 20% to 25% of sedimentary rock
2820-466: A narrow promontory. In all other directions, the ridge descends steeply into slopes and steep cliffs. The climate of the area was warmer and wetter when Göbekli Tepe was occupied than it is today. The site was surrounded by an open steppe grassland, with abundant wild cereals, including einkorn , wheat, and barley , and herds of grazing animals such as wild sheep , wild goat , gazelle , and equids . Large herds of goitered gazelle may have passed by
2961-463: A number of smaller carved stones, which typically cannot be attributed to one period or another. The iconography of these objects is similar to that of the pillars, mostly depicting animals, but also humans, again primarily male. A "totem pole" was discovered in one of the structures, dating to the early PPNB. Reassembled, it is 192 centimetres (6.30 ft) tall and 30 centimetres (0.98 ft) in diameter. It depicts three figures (from top to bottom):
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#17328558276873102-448: A plausible source of mud. Another possibility is direct precipitation from the water. A phenomenon known as whitings occurs in shallow waters, in which white streaks containing dispersed micrite appear on the surface of the water. It is uncertain whether this is freshly precipitated aragonite or simply material stirred up from the bottom, but there is some evidence that whitings are caused by biological precipitation of aragonite as part of
3243-435: A predator (a bear or large felid) with a missing head, and the neck and arms of a human; another figure missing a head with human arms, likely male; and a third figure with a head that had survived intact. Snakes are carved on either side. Klaus Schmidt's view was that Göbekli Tepe was a stone-age mountain sanctuary. He suggested it was a central location for a cult of the dead and that the carved animals are there to protect
3384-542: A primeval oriental myth that preserves a partial memory of the emerging Neolithic. It is apparent that the animal and other images give no indication of organized violence, i.e. there are no depictions of hunting raids or wounded animals, and the pillar carvings generally ignore game on which the society depended, such as deer, in favour of formidable creatures such as lions, snakes, spiders, and scorpions. Expanding on Schmidt's interpretation that round enclosures could represent sanctuaries, Gheorghiu's semiotic interpretation reads
3525-449: A radial rather than layered internal structure, indicating that they were formed by algae in a normal marine environment. Peloids are structureless grains of microcrystalline carbonate likely produced by a variety of processes. Many are thought to be fecal pellets produced by marine organisms. Others may be produced by endolithic (boring) algae or other microorganisms or through breakdown of mollusc shells. They are difficult to see in
3666-544: A small relief depicting a bovid was found. It is the only relief found in this cave. Göbekli Tepe was built and occupied during the earliest part of the Southwest Asian Neolithic , known as the Pre-Pottery Neolithic (PPN, c. 9600 –7000 BCE ). Beginning at the end of the last Ice Age , the PPN marks "the beginnings of village life", producing the earliest evidence for permanent human settlements in
3807-435: A small building adjacent to enclosure D, yielded almost 700 tools. Most common were retouched artifacts, followed by scrapers, perforators and artifacts with gloss . Heavy duty tools, burins and microliths were also present. Over 7000 grinding stones have been found, spanning the entirety of the sites usage, which are suggested to have been used to process cereal based on phytoliths found in associated soil, though it
3948-502: A variety that was an important literary language since the 14th century, but it was replaced by Central Kurdish in the 20th century. European scholars have maintained that Gorani is separate from Kurdish and that Kurdish is synonymous with the Northern Kurdish group, whereas ethnic Kurds maintain that Kurdish encompasses any of the unique languages or dialects spoken by Kurds that are not spoken by neighbouring ethnic groups. Gorani
4089-493: A wide area, with few or no permanent inhabitants. The site was first used at the dawn of the Southwest Asian Neolithic period , which marked the appearance of the oldest permanent human settlements anywhere in the world. Prehistorians link this Neolithic Revolution to the advent of agriculture, but disagree on whether farming caused people to settle down or vice versa. Göbekli Tepe, a monumental complex built on
4230-416: Is a type of carbonate sedimentary rock which is the main source of the material lime . It is composed mostly of the minerals calcite and aragonite , which are different crystal forms of CaCO 3 . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as
4371-560: Is also favored on the seaward margin of shelves and platforms, where there is upwelling deep ocean water rich in nutrients that increase organic productivity. Reefs are common here, but when lacking, ooid shoals are found instead. Finer sediments are deposited close to shore. The lack of deep sea limestones is due in part to rapid subduction of oceanic crust, but is more a result of dissolution of calcium carbonate at depth. The solubility of calcium carbonate increases with pressure and even more with higher concentrations of carbon dioxide, which
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4512-597: Is an official language in Iraq. In Syria, on the other hand, publishing materials in Kurdish is forbidden, though this prohibition is not enforced any more due to the Syrian civil war . Before August 2002, the Turkish government placed severe restrictions on the use of Kurdish, prohibiting the language in education and broadcast media. In March 2006, Turkey allowed private television channels to begin airing programming in Kurdish. However,
4653-482: Is an uncommon mineral in limestone, and siderite or other carbonate minerals are rare. However, the calcite in limestone often contains a few percent of magnesium . Calcite in limestone is divided into low-magnesium and high-magnesium calcite, with the dividing line placed at a composition of 4% magnesium. High-magnesium calcite retains the calcite mineral structure, which is distinct from dolomite. Aragonite does not usually contain significant magnesium. Most limestone
4794-402: Is carbonate rock, and most of this is limestone. Limestone is found in sedimentary sequences as old as 2.7 billion years. However, the compositions of carbonate rocks show an uneven distribution in time in the geologic record. About 95% of modern carbonates are composed of high-magnesium calcite and aragonite. The aragonite needles in carbonate mud are converted to low-magnesium calcite within
4935-618: Is classified as part of the Zaza–Gorani branch of Indo-Iranian languages. The Zaza language , spoken mainly in Turkey, differs both grammatically and in vocabulary and is generally not understandable by Gorani speakers but it is considered related to Gorani. Almost all Zaza-speaking communities, as well as speakers of the closely related Shabaki dialect spoken in parts of Iraqi Kurdistan , identify themselves as ethnic Kurds. Geoffrey Haig and Ergin Öpengin in their recent study suggest grouping
5076-474: Is clusters of peloids cemented together by organic material or mineral cement. Extraclasts are uncommon, are usually accompanied by other clastic sediments, and indicate deposition in a tectonically active area or as part of a turbidity current . The grains of most limestones are embedded in a matrix of carbonate mud. This is typically the largest fraction of an ancient carbonate rock. Mud consisting of individual crystals less than 5 μm (0.20 mils) in length
5217-416: Is commonly white to gray in color. Limestone that is unusually rich in organic matter can be almost black in color, while traces of iron or manganese can give limestone an off-white to yellow to red color. The density of limestone depends on its porosity, which varies from 0.1% for the densest limestone to 40% for chalk. The density correspondingly ranges from 1.5 to 2.7 g/cm . Although relatively soft, with
5358-420: Is controlled largely by the amount of dissolved carbon dioxide ( CO 2 ) in the water. This is summarized in the reaction: Increases in temperature or decreases in pressure tend to reduce the amount of dissolved CO 2 and precipitate CaCO 3 . Reduction in salinity also reduces the solubility of CaCO 3 , by several orders of magnitude for fresh water versus seawater. Near-surface water of
5499-545: Is converted to low-magnesium calcite. Diagenesis is the likely origin of pisoliths , concentrically layered particles ranging from 1 to 10 mm (0.039 to 0.394 inches) in diameter found in some limestones. Pisoliths superficially resemble ooids but have no nucleus of foreign matter, fit together tightly, and show other signs that they formed after the original deposition of the sediments. Silicification occurs early in diagenesis, at low pH and temperature, and contributes to fossil preservation. Silicification takes place through
5640-503: Is deposited close to where it formed, classification of limestone is usually based on its grain type and mud content. Most grains in limestone are skeletal fragments of marine organisms such as coral or foraminifera . These organisms secrete structures made of aragonite or calcite, and leave these structures behind when they die. Other carbonate grains composing limestones are ooids , peloids , and limeclasts ( intraclasts and extraclasts [ ca ] ). Skeletal grains have
5781-460: Is described as coquinite . Chalk is a soft, earthy, fine-textured limestone composed of the tests of planktonic microorganisms such as foraminifera, while marl is an earthy mixture of carbonates and silicate sediments. Limestone forms when calcite or aragonite precipitate out of water containing dissolved calcium, which can take place through both biological and nonbiological processes. The solubility of calcium carbonate ( CaCO 3 )
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5922-617: Is described as micrite . In fresh carbonate mud, micrite is mostly small aragonite needles, which may precipitate directly from seawater, be secreted by algae, or be produced by abrasion of carbonate grains in a high-energy environment. This is converted to calcite within a few million years of deposition. Further recrystallization of micrite produces microspar , with grains from 5 to 15 μm (0.20 to 0.59 mils) in diameter. Limestone often contains larger crystals of calcite, ranging in size from 0.02 to 0.1 mm (0.79 to 3.94 mils), that are described as sparry calcite or sparite . Sparite
6063-462: Is distinguished from micrite by a grain size of over 20 μm (0.79 mils) and because sparite stands out under a hand lens or in thin section as white or transparent crystals. Sparite is distinguished from carbonate grains by its lack of internal structure and its characteristic crystal shapes. Geologists are careful to distinguish between sparite deposited as cement and sparite formed by recrystallization of micrite or carbonate grains. Sparite cement
6204-466: Is known about other large Pre-Pottery Neolithic sites, where ritual and profane functions coexist." For example, the discovery of domestic buildings and rainwater harvesting systems has forced a revision of the 'temple' narrative. Before being documented by archaeologists, the hill Göbekli Tepe stands on, known locally in Kurdish as Girê Mirazan or Xerabreşkê ( Girê Mirazan meaning 'Wish Hill'),
6345-458: Is not a unified language, its many dialects are interrelated and at the same time distinguishable from other Western Iranian languages . The same source classifies different Kurdish dialects as two main groups, northern and central. The average Kurmanji speaker does not find it easy to communicate with the inhabitants of Sulaymaniyah or Halabja . Some linguistic scholars assert that the term "Kurdish" has been applied extrinsically in describing
6486-403: Is not known why every few decades the existing pillars were buried to be replaced by new stones as part of a smaller, concentric ring inside the older one. According to Rémi Hadad, in recent years "the interpretative enthusiasm that sought to see Göbekli Tepe as a regional ceremonial centre where nomadic populations would periodically converge is giving way to a vision that is more in line with what
6627-454: Is not recognized in Turkey, and prior to 2013 the use of Kurdish names containing the letters X , W , and Q , which do not exist in the Turkish alphabet , was not allowed. In 2012, Kurdish-language lessons became an elective subject in public schools. Previously, Kurdish education had only been possible in private institutions. In Iran, though it is used in some local media and newspapers, it
6768-440: Is not unique to the site, with over a half-dozen other similar sites like Karahan Tepe having been found across modern Şanlıurfa Province , dating to approximately the same time period. The site was first noted in a survey in 1963. Schmidt recognized its significance in 1994 and began excavations there the following year. After his death in 2014, work continued as a joint project of Istanbul University , Şanlıurfa Museum , and
6909-458: Is not used in public schools. In 2005, 80 Syrian and Iranian Kurds took part in an experiment and gained scholarships to study in Kurdistan Region , Iraq, in their native tongue. In Kyrgyzstan , 96.21% of the Kurdish population speak Kurdish as their native language. In Kazakhstan, the corresponding percentage is 88.7%. Limestone Limestone ( calcium carbonate CaCO 3 )
7050-560: Is one of the first minerals to precipitate in marine evaporites. Most limestone is formed by the activities of living organisms near reefs, but the organisms responsible for reef formation have changed over geologic time. For example, stromatolites are mound-shaped structures in ancient limestones, interpreted as colonies of cyanobacteria that accumulated carbonate sediments, but stromatolites are rare in younger limestones. Organisms precipitate limestone both directly as part of their skeletons, and indirectly by removing carbon dioxide from
7191-473: Is otherwise chemically fairly pure, with clastic sediments (mainly fine-grained quartz and clay minerals ) making up less than 5% to 10% of the composition. Organic matter typically makes up around 0.2% of a limestone and rarely exceeds 1%. Limestone often contains variable amounts of silica in the form of chert or siliceous skeletal fragments (such as sponge spicules, diatoms , or radiolarians ). Fossils are also common in limestone. Limestone
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#17328558276877332-560: Is preserved. Presumably, this is the remains of a Roman watchtower that was part of the Limes Arabicus , though this is conjecture. Most structures on the plateau seem to be the result of Neolithic quarrying, with the quarries being used as sources for the huge, monolithic architectural elements. Their profiles were pecked into the rock, with the detached blocks then levered out of the rock bank. Several quarries where round workpieces had been produced were identified. Their status as quarries
7473-472: Is produced by decaying organic matter settling into the deep ocean that is not removed by photosynthesis in the dark depths. As a result, there is a fairly sharp transition from water saturated with calcium carbonate to water unsaturated with calcium carbonate, the lysocline , which occurs at the calcite compensation depth of 4,000 to 7,000 m (13,000 to 23,000 feet). Below this depth, foraminifera tests and other skeletal particles rapidly dissolve, and
7614-514: Is secondary dolomite, formed by chemical alteration of limestone. Limestone is exposed over large regions of the Earth's surface, and because limestone is slightly soluble in rainwater, these exposures often are eroded to become karst landscapes. Most cave systems are found in limestone bedrock. Limestone has numerous uses: as a chemical feedstock for the production of lime used for cement (an essential component of concrete ), as aggregate for
7755-451: Is situated on has been shaped by erosion and quarrying from the Neolithic onwards. There are four 10-metre-long (33 ft) and 20-centimetre-wide (7.9 in) channels on the southern part of the plateau, interpreted as the remains of an ancient quarry from which rectangular blocks were taken. These are possibly related to a square building in the neighbourhood, of which only the foundation
7896-531: Is the head. This is confirmed by the fact that some pillars include – in addition to animal reliefs – carvings of arms, hands, and loincloths . The two central pillars occupied a special place in the symbolic architecture of the enclosures. Those in Enclosure ;D represent humans, with arms, a belt, and a piece of cloth that hides the genitals. The sex of the individuals depicted cannot be clearly identified, though Schmidt suggested that they are two men because
8037-458: Is the presence of T-shaped limestone pillars evenly set within thick interior walls composed of unworked stone. Four such circular structures have been unearthed so far. Geophysical surveys indicate that there are 16 more, enclosing up to eight pillars each, amounting to nearly 200 pillars in all. The slabs were transported from bedrock pits located approximately 100 m (330 ft) from the hilltop, with workers using flint points to cut through
8178-475: Is thought by Schmidt to symbolize shoulders, which suggests that the figures were left headless. Whether they were intended to serve as surrogate worshippers, symbolize venerated ancestors, or represent supernatural, anthropomorphic beings is not known. Some of the floors in this, the oldest, layer are made of terrazzo (burnt lime); others are bedrock from which pedestals to hold the large pair of central pillars were carved in high relief. Radiocarbon dating places
8319-456: Is translated to simply mean Kurdish. The Mokriani variety of Sorani is widely spoken in Mokrian. Piranshahr and Mahabad are two principal cities of the Mokrian area. Zaza–Gorani languages , which are spoken by communities in the wider area who identify as ethnic Kurds, are not linguistically classified as Kurdish. Zaza-Gorani is classified as adjunct to Kurdish, although authorities differ in
8460-485: Is unclear whether the cereal was wild or cultivated. The stone pillars in the enclosures at Göbekli Tepe are T-shaped, similar to other Pre-Pottery Neolithic sites in the region. Unlike at these other sites, however, many of the pillars are carved – typically in low relief , though sometimes in high relief. Most carvings depict animals, mostly serpents, foxes, and boars, but also gazelle, mouflon (wild sheep), onager , ducks, and vultures. Insofar as they can be identified,
8601-539: Is unique to the Urfa region, but is found at the majority of PPN sites there. These include Nevalı Çori, Hamzan Tepe , Karahan Tepe , Harbetsuvan Tepesi , Sefer Tepe , and Taslı Tepe . Other stone stelae —without the characteristic T shape—have been documented at contemporary sites further afield, including Çayönü, Qermez Dere , and Gusir Höyük . Radiocarbon dating shows that the earliest exposed structures at Göbekli Tepe were built between 9500 and 9000 BCE , towards
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#17328558276878742-485: The German Archaeological Institute , under the direction of Turkish prehistorian Necmi Karul . Göbekli Tepe was designated a UNESCO World Heritage Site in 2018, recognising its outstanding universal value as "one of the first manifestations of human-made monumental architecture". As of 2015, less than 5% of the site had been excavated. Additional areas were examined by geophysical surveys , which showed
8883-402: The terrazzo floors of the younger complexes at Göbekli Tepe. Immediately northwest of this area are two cistern-like pits that are believed to be part of complex E. One of these pits has a table-high pin as well as a staircase with five steps. The uppermost layer of the tell is the shallowest but accounts for the longest stretch of time. It consists of loose sediments caused by erosion and
9024-496: The Earth's history. Limestone may have been deposited by microorganisms in the Precambrian , prior to 540 million years ago, but inorganic processes were probably more important and likely took place in an ocean more highly oversaturated in calcium carbonate than the modern ocean. Diagenesis is the process in which sediments are compacted and turned into solid rock . During diagenesis of carbonate sediments, significant chemical and textural changes take place. For example, aragonite
9165-574: The Göbekli Tepe iconography as a cosmogonic map that would have related the local community to the surrounding landscape and the cosmos. The assumption that the site was strictly cultic in purpose and not inhabited has been challenged as well by the suggestion that the structures served as large communal houses, "similar in some ways to the large plank houses of the Northwest Coast of North America with their impressive house posts and totem poles ." It
9306-528: The Kurdish languages into Northern Kurdish, Central Kurdish, Southern Kurdish, Zaza , and Gorani, and avoid the subgrouping Zaza–Gorani. The notable professor Zare Yusupova has carried out a lot of work and research into the Gorani dialect (as well as many other minority/ancient Kurdish dialects). During his stay in Damascus , historian Ibn Wahshiyya came across two books on agriculture written in Kurdish, one on
9447-480: The Kurds of Amadiya . This work is very important in Kurdish history as it is the first acknowledgment of the widespread use of a distinctive Kurdish language. Garzoni was given the title Father of Kurdology by later scholars. The Kurdish language was banned in a large portion of Kurdistan for some time. After the 1980 Turkish coup d'état until 1991 the use of the Kurdish language was illegal in Turkey. Today, Sorani
9588-726: The Kurds speak Kurmanji, and most Kurdish texts are written in Kurmanji and Sorani. Kurmanji is written in the Hawar alphabet , a derivation of the Latin script , and Sorani is written in the Sorani alphabet , a derivation of the Arabic script . A separate group of non-Kurdish Northwestern Iranian languages, the Zaza–Gorani languages , are also spoken by several million ethnic Kurds. The classification of Laki as
9729-488: The Neolithic in places, and the transition to agriculture took thousands of years, with different paces and trajectories in different regions. Archaeologists divide the Pre-Pottery Neolithic into two subperiods: the Pre-Pottery Neolithic A (PPNA, c. 9600 –8800 BCE ) and the Pre-Pottery Neolithic B (PPNB, c. 8800 and 7000 BCE ). The earliest phases at Göbekli Tepe have been dated to
9870-407: The Neolithic, as well as some traces of activity from later periods. Current excavators interpret Göbekli Tepe as a settlement, based on recent findings such as domestic structures and features, water supply installations, and Neolithic tools associated with domestic use. The site's original excavator Klaus Schmidt had described it as a sanctuary used by groups of nomadic hunter-gatherers from
10011-400: The PPN based on the types of stone tools found there, considering a PPNA date "most probable". Establishing its absolute chronology took longer due to methodological challenges. Though the first two radiocarbon dates were published in 1998, these and other samples from the fill of the structure dated to the late 10th and early 9th millennium – 500 to 1000 years later than expected for
10152-713: The PPNA; later phases to the PPNB. Evidence indicates the inhabitants of Göbekli Tepe were hunter-gatherers who supplemented their diet with early forms of domesticated cereal and lived in villages for at least part of the year. Tools such as grinding stones and mortars and pestles found at the site have been analyzed and suggest considerable cereal processing. Archaeozoological evidence hints at "large-scale hunting of gazelle between midsummer and autumn." PPN villages consisted mainly of clusters of stone or mud brick houses, but sometimes also substantial monuments and large buildings. These include
10293-428: The Turkish government said that they must avoid showing children's cartoons , or educational programs that teach Kurdish, and could broadcast only for 45 minutes a day or four hours a week. The state-run Turkish Radio and Television Corporation (TRT) started its 24-hour Kurdish television station on 1 January 2009 with the motto "we live under the same sky". The Turkish prime minister sent a video message in Kurdish to
10434-430: The accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite , a closely related rock, which contains
10575-405: The animals are male, and often depicted with an aggressive posture. Abstract shapes are also depicted, mostly an upright or horizontal H-shaped symbol, but also crescents and disks. Depictions of humans are rare; pillar 43 in enclosure D includes a headless man with an erect phallus . However, the 'T'-shape of the pillars themselves is anthropomorphic : the shaft is the body, and the top
10716-453: The approximate borders of the areas where the main ethnic core of the speakers of the contemporary Kurdish dialects was formed. The most argued hypothesis on the localisation of the ethnic territory of the Kurds remains D.N. Mackenzie 's theory, proposed in the early 1960s (Mackenzie 1961). Developing the ideas of P. Tedesco (1921: 255) and regarding the common phonetic isoglosses shared by Kurdish, Persian, and Baluchi , Mackenzie concluded that
10857-434: The base of roads, as white pigment or filler in products such as toothpaste or paint, as a soil conditioner , and as a popular decorative addition to rock gardens . Limestone formations contain about 30% of the world's petroleum reservoirs . Limestone is composed mostly of the minerals calcite and aragonite , which are different crystal forms of calcium carbonate ( CaCO 3 ). Dolomite , CaMg(CO 3 ) 2 ,
10998-657: The beds. This may include the formation of vugs , which are crystal-lined cavities within the limestone. Diagenesis may include conversion of limestone to dolomite by magnesium-rich fluids. There is considerable evidence of replacement of limestone by dolomite, including sharp replacement boundaries that cut across bedding. The process of dolomitization remains an area of active research, but possible mechanisms include exposure to concentrated brines in hot environments ( evaporative reflux ) or exposure to diluted seawater in delta or estuary environments ( Dorag dolomitization ). However, Dorag dolomitization has fallen into disfavor as
11139-538: The belts they wear are a male attribute in the period. There is only one certain representation of a woman, depicted naked on a slab. Schmidt and zooarchaeologist Joris Peters have argued that the variety of fauna depicted on the pillars means they likely do not express a single iconography. They suggest that, since many of the animals pictured are predators, the stones may have been intended to stave off evils through some form of magic representation, or served as totems . The structures at Göbekli Tepe have also yielded
11280-435: The builders good access to raw material: the soft limestone bedrock from which the complex was built, and the flint to make the tools to work the limestone. The prehistoric village acquired drinking water through a rainwater harvesting system, consisting of carved channels that fed several cisterns carved into the bedrock under the site, which could hold at least 150 cubic metres (5,300 cu ft) of water. Additionally,
11421-405: The capability of a single extended family or village community in the Neolithic. They also match the number of people that could have comfortably been inside one of the buildings at the same time. Enclosures B, C and D were initially planned as a single, hierarchical complex that forms an equilateral triangle , according to Haklay and Gopher. Göbekli Tepe is littered with flint artifacts, from
11562-450: The construction of these early circles c. 9000 BCE . Later enclosures were rectangular in shape, perhaps to make more efficient use of space compared with circular structures. They often are associated with the emergence of the Neolithic, but the T-shaped pillars, the main feature of the older enclosures, also are present here, indicating that the buildings continued to serve
11703-509: The culture of the vine and the palm tree, and the other on water and the means of finding it out in unknown ground. He translated both from Kurdish into Arabic in the early 9th century AD. Among the earliest Kurdish religious texts is the Yazidi Black Book , the sacred book of Yazidi faith. It is considered to have been authored sometime in the 13th century AD by Hassan bin Adi (b. 1195 AD),
11844-414: The dead. Butchered bones found in large numbers from the local game such as deer, gazelle, pigs, and geese have been identified as refuse from food hunted and cooked or otherwise prepared for the congregants. Zooarchaeological analysis shows that gazelle were only seasonally present in the region, suggesting that events such as rituals and feasts were likely timed to occur during periods when game availability
11985-462: The depositional fabric of carbonate rocks. Dunham divides the rocks into four main groups based on relative proportions of coarser clastic particles, based on criteria such as whether the grains were originally in mutual contact, and therefore self-supporting, or whether the rock is characterized by the presence of frame builders and algal mats. Unlike the Folk scheme, Dunham deals with the original porosity of
12126-469: The deposits are highly porous, so that they have a spongelike texture, they are typically described as tufa . Secondary calcite deposited by supersaturated meteoric waters ( groundwater ) in caves is also sometimes described as travertine. This produces speleothems , such as stalagmites and stalactites . Coquina is a poorly consolidated limestone composed of abraded pieces of coral , shells , or other fossil debris. When better consolidated, it
12267-545: The details. groups Kurdish with Zaza Gorani within a "Northwestern I" group, while Glottolog based on Encyclopædia Iranica prefers an areal grouping of "Central dialects" (or "Kermanic") within Northwest Iranic, with Kurdish but not Zaza-Gorani grouped with "Kermanic". Gorani is distinct from Northern and Central Kurdish, yet shares vocabulary with both of them and there are some grammatical similarities with Central Kurdish. The Hawrami dialects of Gorani includes
12408-406: The earth's oceans are oversaturated with CaCO 3 by a factor of more than six. The failure of CaCO 3 to rapidly precipitate out of these waters is likely due to interference by dissolved magnesium ions with nucleation of calcite crystals, the necessary first step in precipitation. Precipitation of aragonite may be suppressed by the presence of naturally occurring organic phosphates in
12549-584: The enclosure, which led to repairs and stabilization works to be conducted. At a later point, in Building Phase 5, terrace walls were erected, likely to prevent future damage from such events. These measures, however, proved futile, when a second major slope slide probably caused the enclosure to the abandoned during Building Phase 6, around the late 9th millennium BCE. Other enclosure suffered a similar fate, which might have led to new enclosures being constructed to replace them. Previously, it had been assumed that
12690-410: The end of the Pre-Pottery Neolithic A (PPNA) period. The site was significantly expanded in the early 9th millennium BCE and remained in use until around 8000 BCE , or perhaps slightly later (the early Pre-Pottery Neolithic B , PPNB). There is evidence that smaller groups returned to live amongst the ruins after the Neolithic structures were abandoned. Schmidt originally dated the site to
12831-564: The fact that this usage reflects the sense of ethnic identity and unity among the Kurds. From a linguistic or at least a grammatical point of view, however, Kurmanji and Sorani differ as much from each other as English and German, and it would seem appropriate to refer to them as languages. For example, Sorani has neither gender nor case-endings, whereas Kurmanji has both.... Differences in vocabulary and pronunciation are not as great as between German and English, but they are still considerable. According to Encyclopaedia of Islam , although Kurdish
12972-489: The fifteenth century. From the 15th to 17th centuries, classical Kurdish poets and writers developed a literary language. The most notable classical Kurdish poets from this period were Ali Hariri , Ahmad Khani , Malaye Jaziri and Faqi Tayran . The Italian priest Maurizio Garzoni published the first Kurdish grammar titled Grammatica e Vocabolario della Lingua Kurda in Rome in 1787 after eighteen years of missionary work among
13113-399: The first refers to the grains and the second to the cement. For example, a limestone consisting mainly of ooids, with a crystalline matrix, would be termed an oosparite. It is helpful to have a petrographic microscope when using the Folk scheme, because it is easier to determine the components present in each sample. Robert J. Dunham published his system for limestone in 1962. It focuses on
13254-447: The following year and soon unearthed the first of the huge T-shaped pillars. Ultimately he found only three tombs on the eastmost hill-group, which were a pilgrimage destination. Yıldız went on to work on the excavations and serve as the site's guard. Kurdish languages Ancient Medieval Modern Kurdish ( Kurdî , کوردی ) is a Northwestern Iranian language or group of languages spoken by Kurds in
13395-572: The formation of distinctive minerals from the silica and clay present in the original limestone. Two major classification schemes, the Folk and Dunham, are used for identifying the types of carbonate rocks collectively known as limestone. Robert L. Folk developed a classification system that places primary emphasis on the detailed composition of grains and interstitial material in carbonate rocks . Based on composition, there are three main components: allochems (grains), matrix (mostly micrite), and cement (sparite). The Folk system uses two-part names;
13536-429: The geologic record are called bioherms . Many are rich in fossils, but most lack any connected organic framework like that seen in modern reefs. The fossil remains are present as separate fragments embedded in ample mud matrix. Much of the sedimentation shows indications of occurring in the intertidal or supratidal zones, suggesting sediments rapidly fill available accommodation space in the shelf or platform. Deposition
13677-515: The great-grandnephew of Sheikh Adi ibn Musafir (d. 1162), the founder of the faith. It contains the Yazidi account of the creation of the world, the origin of man, the story of Adam and Eve and the major prohibitions of the faith. According to The Cambridge History of the Kurds , "the first proper 'text'" written in Kurdish is a short Christian prayer. It was written in Armenian characters, and dates from
13818-405: The iconography of Çatalhöyük and Jericho . Few humanoid figures have appeared in the art at Göbekli Tepe. Some of the T-shaped pillars have human arms carved on their lower half, however, suggesting to site excavator Schmidt that they are intended to represent the bodies of stylized humans (or perhaps deities). Loincloths appear on the lower half of a few pillars. The horizontal stone slab on top
13959-486: The language the Kurds speak, whereas some ethnic Kurds have used the word term to simply describe their ethnicity and refer to their language as Kurmanji , Sorani , Hewrami , Kermanshahi , Kalhori or whatever other dialect or language they speak. Some historians have noted that it is only recently that the Kurds who speak the Sorani dialect have begun referring to their language as Kurdî , in addition to their identity, which
14100-550: The large enclosures were intentionally back-filled, an interpretation that has fallen out of favor since Klaus Schmidt's death. In the earliest occupation phase, round-oval domestic structures were built alongside the large enclosures, which indicate a (semi) sedentary lifestyle. Over time there was an increasing tendency of these buildings to have a rectangular floor plan. In the final settlement phase only small structures were erected. Before any burials were found, Schmidt speculated that graves could have been located in niches behind
14241-726: The limestone bedrock. The pillars are the oldest known megaliths in the world. Two taller pillars stand facing one another at the centre of each circle. Whether the circles were provided with a roof is uncertain. Stone benches designed for sitting are found in the interior. Many of the pillars are decorated with abstract , enigmatic pictograms and carved animal reliefs. The pictograms may represent commonly understood sacred symbols, as known from Neolithic cave paintings elsewhere. The reliefs depict mammals such as lions, bulls, boars, foxes, gazelle, and donkeys; snakes and other reptiles; arthropods such as insects and arachnids; and birds, particularly vultures. Vultures also feature prominently in
14382-415: The local water table may have been higher, activating springs closer to the site which are dormant today. Excavations have taken place at the southern slope of the tell, south, and west of a mulberry that marks an Islamic pilgrimage , but archaeological finds come from the entire plateau. The team has also found many remains of tools. At the western escarpment , a small cave has been discovered in which
14523-420: The middle or even early 10th millennium BCE . Subsequent research led to a significant revision of Schmidt's chronology, including the abandonment of the hypothesis that the fill of the structures was brought from elsewhere, and a recognition that direct dates on plaster are affected by the old wood effect . Together with new radiocarbon dates, this has established the site's absolute chronology as falling in
14664-469: The modern surface. The revised chronology consists of eight phases that span at least 1,500 years. It details the history of the large circular enclosures, including events that led to their alteration or abandonment, and the evolution of the domestic buildings surrounding them. The first circular compounds appear around the latter half of the 10th millennium BCE . They range from 10 to 30 m (33 to 98 ft) in diameter. Their most notable feature
14805-671: The mound to contain at least 20 large enclosures. Göbekli Tepe is located in the Taş Tepeler ('Stone Hills'), in the foothills of the Taurus Mountains . It overlooks the Harran plain and the headwaters of the Balikh River , a tributary of the Euphrates . The site is a tell (artificial mound) on a flat limestone plateau. In the north, the plateau is connected to the neighbouring mountains by
14946-463: The name "lion pillar building" by which their enclosure is known. The enclosures, lying over 10 metres (33 ft) below the highest areas of the settlement, were subject to several slope slide events during the occupation period of Göbekli Tepe. A particularly severe one occurred at the end of the early PPNB. which inundated enclosure D with rubble of domestic structures and sediments, including burials and midden deposits. This caused severe damage to
15087-581: The north-west Iranian group". Ludwig Paul concludes that Kurdish seems to be a Northwestern Iranian language in origin, but acknowledges that it shares many traits with Southwestern Iranian languages like Persian , apparently due to longstanding and intense historical contacts. Windfuhr identified Kurdish dialects as Parthian , albeit with a Median substratum. Windfuhr and Frye assume an eastern origin for Kurdish and consider it as related to eastern and central Iranian dialects. The present state of knowledge about Kurdish allows, at least roughly, drawing
15228-410: The ocean basins, but limestone is rarely preserved in continental slope and deep sea environments. The best environments for deposition are warm waters, which have both a high organic productivity and increased saturation of calcium carbonate due to lower concentrations of dissolved carbon dioxide. Modern limestone deposits are almost always in areas with very little silica-rich sedimentation, reflected in
15369-717: The opening ceremony, which was attended by Minister of Culture and other state officials. The channel uses the X , W , and Q letters during broadcasting. However, most of these restrictions on private Kurdish television channels were relaxed in September 2009. In 2010, Kurdish municipalities in the southeast began printing marriage certificates , water bills, construction and road signs , as well as emergency, social and cultural notices in Kurdish alongside Turkish. Also Imams began to deliver Friday sermons in Kurdish and Esnaf price tags in Kurdish. Many mayors were tried for issuing public documents in Kurdish language. The Kurdish alphabet
15510-586: The other languages spoken by Kurds in the region including the Gorani language in parts of Iranian Kurdistan and Iraqi Kurdistan. Philip G. Kreyenbroek , an expert writing in 1992, says: Since 1932 most Kurds have used the Roman script to write Kurmanji.... Sorani is normally written in an adapted form of the Arabic script.... Reasons for describing Kurmanji and Sorani as 'dialects' of one language are their common origin and
15651-487: The period 9500 to 8000 BCE – the late PPNA and PPNB. The preliminary, now abandoned, stratigraphic model by Klaus Schmidt consisted of three architectural layers. The large circular enclosures were attributed to Layer III, dated to the 10th millennium BCE (PPNA). The smaller rectangular structures and the abandonment of the site were assigned to Layer II in the 9th millennium BCE (early to middle PPNB). Layer I consisted of all post-Neolithic activities up to
15792-500: The pillars alone must have involved hundreds of people. According to these experiments, one moai of similar size to a T-shaped pillar from Göbekli Tepe would have taken 20 people a year to carve, and 50–75 people a week to transport 15 km. Schmidt's team has also cited a 1917 account of the construction of a megalith on the Indonesian island of Nias , which took 525 people three days. These estimates underpin their interpretation that
15933-426: The reaction: Fossils are often preserved in exquisite detail as chert. Cementing takes place rapidly in carbonate sediments, typically within less than a million years of deposition. Some cementing occurs while the sediments are still under water, forming hardgrounds . Cementing accelerates after the retreat of the sea from the depositional environment, as rainwater infiltrates the sediment beds, often within just
16074-483: The region of Kurdistan , namely in southeast Turkey , northern Iraq , northwest Iran , and northern Syria . It is also spoken in northeast Iran, as well as in certain areas of Armenia and Azerbaijan . Kurdish varieties constitute a dialect continuum , with some mutually unintelligible varieties, and collectively have 26 million native speakers. The main varieties of Kurdish are Kurmanji , Sorani , and Southern Kurdish ( Xwarîn ). The majority of
16215-482: The relative purity of most limestones. Reef organisms are destroyed by muddy, brackish river water, and carbonate grains are ground down by much harder silicate grains. Unlike clastic sedimentary rock, limestone is produced almost entirely from sediments originating at or near the place of deposition. Limestone formations tend to show abrupt changes in thickness. Large moundlike features in a limestone formation are interpreted as ancient reefs , which when they appear in
16356-416: The ridge-top site to the slopes. The tool assemblage found resembles that of other Northern Levantine Pre-Pottery Neolithic (settlement) sites. In 1963, over 3,000 Neolithic tools were uncovered, the vast majority of excellent quality flint, only a handful of obsidian . Cores , various blades, flakes , scrapers , burins , and projectile points , were the most common tool types. Excavations of Space 16,
16497-460: The rock. The Dunham scheme is more useful for hand samples because it is based on texture, not the grains in the sample. A revised classification was proposed by Wright (1992). It adds some diagenetic patterns to the classification scheme. Travertine is a term applied to calcium carbonate deposits formed in freshwater environments, particularly waterfalls , cascades and hot springs . Such deposits are typically massive, dense, and banded. When
16638-415: The same function in the culture, during the Pre-Pottery Neolithic B (PPNB). The several adjoining rectangular, doorless, and windowless rooms have floors of polished lime reminiscent of Roman terrazzo floors. Carbon dating has yielded dates between 8800 and 8000 BCE . Several T-pillars up to 1.5 meters tall occupy the center of the rooms. A pair decorated with fierce-looking lions is the rationale for
16779-479: The sediments increases. Chemical compaction takes place by pressure solution of the sediments. This process dissolves minerals from points of contact between grains and redeposits it in pore space, reducing the porosity of the limestone from an initial high value of 40% to 80% to less than 10%. Pressure solution produces distinctive stylolites , irregular surfaces within the limestone at which silica-rich sediments accumulate. These may reflect dissolution and loss of
16920-662: The sediments of the ocean floor abruptly transition from carbonate ooze rich in foraminifera and coccolith remains ( Globigerina ooze) to silicic mud lacking carbonates. In rare cases, turbidites or other silica-rich sediments bury and preserve benthic (deep ocean) carbonate deposits. Ancient benthic limestones are microcrystalline and are identified by their tectonic setting. Fossils typically are foraminifera and coccoliths. No pre-Jurassic benthic limestones are known, probably because carbonate-shelled plankton had not yet evolved. Limestones also form in freshwater environments. These limestones are not unlike marine limestone, but have
17061-416: The site in seasonal migrations. There is no evidence of substantial woodlands nearby; 90% of the charcoal recovered at the site was from pistachio or almond trees. Like most Pre-Pottery Neolithic (PPN) sites in the Urfa region, Göbekli Tepe was built on a high point on the edge of the mountains, giving it both a wide view over the plain beneath, and good visibility from the plain. This location also gave
17202-631: The site was built by a large, non-resident workforce, coerced or enticed there by a small religious elite. However, others estimate that just 7–14 people could have moved the pillars using ropes and water or another lubricant, with techniques used to construct other monuments such as Stonehenge . Experiments at Göbekli Tepe itself have suggested that all the PPNB structures currently exposed could have been built by 12–24 people in less than four months, allowing for time spent quarrying stone and gathering, and preparing food. These labour estimates are thought to be within
17343-419: The southern Plateau. Archaeologists disagree on how much labour was needed to construct the site. Schmidt maintained that "the work of quarrying, transporting, and erecting tons of heavy, monolithic, and almost universally well-prepared limestone pillars [...] was not within the capability of a few people". Using Thor Heyerdahl 's experiments with the moai of Rapa Nui as a reference, he estimated that moving
17484-407: The speakers of these three languages may once have been in closer contact. Kurdish varieties are divided into three or four groups, with varying degrees of mutual intelligibility. In historical evolution terms, Kurmanji is less modified than Sorani and Pehlewani in both phonetic and morphological structure. The Sorani group has been influenced by among other things its closer cultural proximity to
17625-473: The tell, there is an incised platform with two sockets that could have held pillars and a surrounding flat bench. This platform corresponds to the oldest parts of the tell. Continuing the naming pattern, it is called "complex E". Owing to its similarity to the cult-buildings at Nevalı Çori it has also been called "Temple of the Rock". Its floor has been carefully hewn out of the bedrock and smoothed, reminiscent of
17766-679: The top of a rocky mountaintop, with no clear evidence of agricultural cultivation produced to date, has played a prominent role in this debate. Archaeological evidence suggests that the inhabitants processed cereal at the site, though it is unclear whether it was wild or cultivated. No definitive purpose has been determined for the megalithic enclosures; Schmidt had described them as the "world's first temple[s]", but incorrectly surmised that they were intentionally and ritually backfilled. Recent stratigraphic studies have instead revealed that they were filled by slope slide events, and sometimes repaired and modified thereafter. The architecture and iconography
17907-494: The tower and walls at Tell es-Sultan (Jericho), as well as large, roughly contemporaneous circular buildings at Göbekli Tepe, Nevalı Çori , Çayönü , Wadi Feynan 16 , Jerf el-Ahmar , Tell 'Abr 3 , and Tepe Asiab . Archaeologists typically associate these structures with communal activities which, together with the communal effort needed to build them, helped to maintain social interactions in PPN communities as they grew in size. The T-shaped pillar tradition seen at Göbekli Tepe
18048-574: The two official languages of Iraq and is in political documents simply referred to as "Kurdish". The Kurdish varieties belong to the Iranian branch of the Indo-European family . They are generally classified as Northwestern Iranian languages, or by some scholars as intermediate between Northwestern and Southwestern Iranian. Martin van Bruinessen notes that "Kurdish has a strong South-Western Iranian element", whereas "Zaza and Gurani [...] do belong to
18189-514: The upper layers of the site. At some point, attempts had been made to break up some of the pillars, presumably by farmers who mistook them for ordinary large rocks. In October 1994, German archaeologist Klaus Schmidt , who had previously been working at Nevalı Çori , was looking for evidence of similar sites in the area and decided to re-examine the location described by the Chicago researchers in 1963. Asking in nearby villages about hills with flint, he
18330-457: The virtually-uninterrupted use of the hill for agricultural purposes since it ceased to operate as a ceremonial center. Around the beginning of the 8th millennium BCE , Göbekli Tepe lost its importance. The advent of agriculture and animal husbandry brought new realities to human life in the area, and the "Stone-age zoo" apparently lost whatever significance it had had for the region's older, foraging communities. The plateau Göbekli Tepe
18471-508: The walls of the circular building. In 2017, fragments of human crania with incisions were discovered at the site, interpreted as a manifestation of the widespread Neolithic skull cult . Special preparation of human crania in the form of plastered human skulls is known from the Pre-Pottery Neolithic period at Levantine sites such as Tell es-Sultan (also known as Jericho ), Tell Aswad , and Yiftahel , and later in Anatolia at Çatalhöyük . At
18612-533: The water by photosynthesis and thereby decreasing the solubility of calcium carbonate. Limestone shows the same range of sedimentary structures found in other sedimentary rocks. However, finer structures, such as lamination , are often destroyed by the burrowing activities of organisms ( bioturbation ). Fine lamination is characteristic of limestone formed in playa lakes , which lack the burrowing organisms. Limestones also show distinctive features such as geopetal structures , which form when curved shells settle to
18753-553: The water. Although ooids likely form through purely inorganic processes, the bulk of CaCO 3 precipitation in the oceans is the result of biological activity. Much of this takes place on carbonate platforms . The origin of carbonate mud, and the processes by which it is converted to micrite, continue to be a subject of research. Modern carbonate mud is composed mostly of aragonite needles around 5 μm (0.20 mils) in length. Needles of this shape and composition are produced by calcareous algae such as Penicillus , making this
18894-425: The western edge of the hill, a lionlike figure was found. In this area, flint and limestone fragments occur more frequently. It was, therefore, suggested that this could have been some kind of sculpture workshop. It is unclear, on the other hand, how to classify three phallic depictions from the surface of the southern plateau. They are near the quarries of classical times, making their dating difficult. Apart from
19035-449: The world's oldest known megaliths . Many of these pillars are decorated with anthropomorphic details, clothing, and sculptural reliefs of wild animals, providing archaeologists rare insights into prehistoric religion and the particular iconography of the period. The 15 m (50 ft) high, 8 ha (20-acre) tell is densely covered with ancient domestic structures and other small buildings, quarries, and stone-cut cisterns from
19176-647: The world. Archaeologists have long associated the appearance of these settlements with the Neolithic Revolution —the transition from hunting and gathering to agriculture—but disagree on whether the adoption of farming caused people to settle down, or settling down caused people to adopt farming. Despite the name, the Neolithic Revolution in Southwest Asia was "drawn out and locally variable". Elements of village life appeared as early as 10,000 years before
19317-400: Was at its peak. Schmidt saw the construction of Göbekli Tepe as contributing to the later development of urban civilization. Schmidt also speculated on the belief systems of the groups that created Göbekli Tepe, based on comparisons with other shrines and settlements. He presumed shamanic practices and suggested that the T-shaped pillars represent human forms, perhaps ancestors, whereas he saw
19458-418: Was confirmed by the find of a 3-by-3 metre piece at the southeastern slope of the plateau. Unequivocally Neolithic are three T-shaped pillars that had not yet been levered out of the bedrock. The largest of them lies on the northern plateau. It has a length of 7 m (23 ft) and its head has a width of 3 m (10 ft). Its weight may be around 50 tons. The two other unfinished pillars lie on
19599-685: Was considered a sacred place. The archaeological site was first noted in a survey conducted by Istanbul University and the University of Chicago in 1963. American archaeologist Peter Benedict identified the stone tools collected from the surface of site as characteristic of the Aceramic Neolithic , but apparently mistook the upper parts of the T-shaped pillars for grave markers. The hill had long been under agricultural cultivation, and generations of local inhabitants had frequently moved rocks and placed them in clearance piles, which may have disturbed
19740-426: Was guided to Göbekli Tepe by Mahmut Yıldız, whose family owned the land the site was situated on. The Yıldız family had previously discovered finds while ploughing there, which they reported to the local museum. Having found similar structures at Nevalı Çori, Schmidt recognized the possibility that the stone slabs were not grave markers as supposed by Benedict, but the tops of prehistoric megaliths . He began excavations
19881-416: Was likely deposited in pore space between grains, suggesting a high-energy depositional environment that removed carbonate mud. Recrystallized sparite is not diagnostic of depositional environment. Limestone outcrops are recognized in the field by their softness (calcite and aragonite both have a Mohs hardness of less than 4, well below common silicate minerals) and because limestone bubbles vigorously when
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