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143-436: Selima lies at the base of an escarpment of Jurassic and Cretaceous rock. Around 8300 BC, a freshwater lake formed over the site with depths of 3–10 metres (9.8–32.8 ft). The surrounding vegetation was savannah at the time. The remains of lacustrine fauna and of Palaeolithic artefacts have been recovered from the site. Around 4300, it transitioned to a saltwater sabkha and by 2700 it had dried up. Today it lies over

286-570: A caste and perform a range of roles, including as a historian or library, musician, poet, mediator of family and tribal disputes, spokesperson, and served in the king's court, not dissimilar from the European bard . They keep records of all births, death, and marriages through the generations of the village or family. When Sundiata Keita founded the Mali Empire , he was offered Balla Fasséké as his griot to advise him during his reign, giving rise to

429-542: A writing system , or in parallel to a writing system. It is the most widespread medium of human communication. They often remain in use in the modern era throughout for cultural preservation . Religions such as Buddhism , Hinduism , Catholicism , and Jainism have used oral tradition, in parallel to writing, to transmit their canonical scriptures , rituals , hymns and mythologies. African societies have broadly been labelled oral civilisations , contrasted with literate civilisations , due to their reverence for

572-406: A better understanding of Homeric epics. The long oral tradition that has sustained Albanian epic poetry reinforces the idea that pre-Homeric epic poetry was oral. The theory of oral-formulaic composition was developed also through the scholarly study of Albanian epic verse. The Albanian traditional singing of epic verse from memory is one of the last survivors of its kind in modern Europe , and

715-726: A book entitled Description of the Terrains that Constitute the Crust of the Earth or Essay on the Structure of the Known Lands of the Earth. In this book, Brongniart used the phrase terrains jurassiques when correlating the "Jura-Kalkstein" of Humboldt with similarly aged oolitic limestones in Britain, thus coining and publishing the term "Jurassic". The German geologist Leopold von Buch in 1839 established

858-572: A cliff face north of the hamlet of East Quantoxhead , 6 kilometres east of Watchet , Somerset , England , within the Blue Lias , and was ratified in 2000. The beginning of the Sinemurian is defined by the first appearance of the ammonite Vermiceras quantoxense . Albert Oppel in 1858 named the Pliensbachian Stage after the hamlet of Pliensbach in the community of Zell unter Aichelberg in

1001-503: A collective or tribal memory extending beyond personal experience but nevertheless representing a shared reality. Native languages have in some cases up to twenty words to describe physical features like rain or snow and can describe the spectra of human emotion in very precise ways, allowing storytellers to offer their own personalized take on a story based on their own lived experiences. Fluidity in story deliverance allowed stories to be applied to different social circumstances according to

1144-543: A dominant component of Jurassic floras. The Late Triassic and Jurassic was a major time of diversification of conifers, with most modern conifer groups appearing in the fossil record by the end of the Jurassic, having evolved from voltzialean ancestors. Araucarian conifers have their first unambiguous records during the Early Jurassic, and members of the modern genus Araucaria were widespread across both hemispheres by

1287-536: A heavily rhythmic speech filled with mnemonic devices enhances memory and recall. A few useful mnemonic devices include alliteration , repetition, assonance , and proverbial sayings. In addition, the verse is often metrically composed with an exact number of syllables or morae —such as with Greek and Latin prosody and in Chandas found in Hindu and Buddhist texts. The verses of the epic or text are typically designed wherein

1430-623: A kink in one of the plate boundaries, resulting in the formation of the Pacific Plate at the centre of the junction. During the Middle to early Late Jurassic, the Sundance Seaway , a shallow epicontinental sea , covered much of northwest North America. The eustatic sea level is estimated to have been close to present levels during the Hettangian and Sinemurian, rising several tens of metres during

1573-405: A means of teaching. Plots often reflect real life situations and may be aimed at particular people known by the story's audience. In this way, social pressure could be exerted without directly causing embarrassment or social exclusion . For example, rather than yelling, Inuit parents might deter their children from wandering too close to the water's edge by telling a story about a sea monster with

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1716-483: A phenomenon that is explained by the lack of state formation among Albanians and their ancestors – the Illyrians , being able to preserve their "tribally" organized society . This distinguished them from civilizations such as Ancient Egypt , Minoans and Mycenaeans , who underwent state formation and disrupted their traditional memory practices. Albanian epic poetry has been analysed by Homeric scholars to acquire

1859-567: A physical struggle between a Thunderbird and a Whale. One such story tells of the Thunderbird, which can create thunder by moving just a feather, piercing the Whale's flesh with its talons, causing the Whale to dive to the bottom of the ocean, bringing the Thunderbird with it. Another depicts the Thunderbird lifting the Whale from the Earth then dropping it back down. Regional similarities in themes and characters suggests that these stories mutually describe

2002-540: A position of particular importance, as it was believed to be a more reliable medium for information transmission than prose. This belief stemmed from observations that highly structured language, with its rhythmic and phonetic patterns, tended to undergo fewer alterations during oral transmission. Each genre of rhymed poetry served distinct social and cultural functions. These range from spontaneous compositions at celebrations to carefully crafted historical accounts, political commentaries, and entertainment pieces. Among these,

2145-664: A pouch for children within its reach. One single story could provide dozens of lessons. Stories were also used as a means to assess whether traditional cultural ideas and practices are effective in tackling contemporary circumstances or if they should be revised. Native American storytelling is a collaborative experience between storyteller and listeners. Native American tribes generally have not had professional tribal storytellers marked by social status. Stories could and can be told by anyone, with each storyteller using their own vocal inflections, word choice, content, or form. Storytellers not only draw upon their own memories, but also upon

2288-811: A reason behind indoctrination . Writing systems are not known to exist among Native North Americans before contact with Europeans except among some Mesoamerican cultures, and possibly the South American quipu and North American wampum , although those two are debatable. Oral storytelling traditions flourished in a context without the use of writing to record and preserve history, scientific knowledge, and social practices. While some stories were told for amusement and leisure, most functioned as practical lessons from tribal experience applied to immediate moral, social, psychological, and environmental issues. Stories fuse fictional, supernatural, or otherwise exaggerated characters and circumstances with real emotions and morals as

2431-453: A result of high ocean acidity and temperature inhibiting its mineralisation into apatite; the abundance of phosphorus in marine environments caused further eutrophication and consequent anoxia in a positive feedback loop. The end-Jurassic transition was originally considered one of eight mass extinctions, but is now considered to be a complex interval of faunal turnover, with the increase in diversity of some groups and decline in others, though

2574-427: A society, with the latter much more likely to use oral tradition and oral literature even when a writing system has been developed or when having access to one. The Akan proverbs translated as "Ancient things in the ear" and "Ancient things are today" refer to present-day delivery and the past content, and as such oral traditions are both simultaneously expressions of the past and the present. Vansina says that to ignore

2717-589: A study published in February 2020, new evidence showed that both Budj Bim and Tower Hill volcanoes erupted between 34,000 and 40,000 years ago. Significantly, this is a "minimum age constraint for human presence in Victoria ", and also could be interpreted as evidence for the oral histories of the Gunditjmara people, an Aboriginal Australian people of south-western Victoria, which tell of volcanic eruptions being some of

2860-498: A tavern on the Darb al-Arbaʿīn managed by a warrior-princess named Selima and as a Christian convent . The Catholic missionary Theodor Krump described it as the ruins of an eight-celled monastery when he passed through in 1700. Support for this theory may come from the Ḥudūd al-ʿĀlam , a 10th-century Persian geography, which describes two monasteries as lying "in the desert between the Nuba and

3003-560: A tour of the region in 1795, German naturalist Alexander von Humboldt recognized carbonate deposits within the Jura Mountains as geologically distinct from the Triassic aged Muschelkalk of southern Germany , but he erroneously concluded that they were older. He then named them Jura-Kalkstein ('Jura limestone') in 1799. In 1829, the French naturalist Alexandre Brongniart published

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3146-399: A viable source of evidence for establishing the affiliation between cultural objects and Native Nations. Oral traditions face the challenge of accurate transmission and verifiability of the accurate version, particularly when the culture lacks written language or has limited access to writing tools. Oral cultures have employed various strategies that achieve this without writing. For example,

3289-576: A written intermediate, and they can also be applied to oral governance. Rudyard Kipling 's The Jungle Book provides an excellent demonstration of oral governance in the Law of the Jungle . Not only does grounding rules in oral proverbs allow for simple transmission and understanding, but it also legitimizes new rulings by allowing extrapolation. These stories, traditions, and proverbs are not static, but are often altered upon each transmission, barring any change to

3432-483: Is Austrohamia minuta from the Early Jurassic (Pliensbachian) of Patagonia, known from many parts of the plant. The reproductive structures of Austrohamia have strong similarities to those of the primitive living cypress genera Taiwania and Cunninghamia . By the Middle to Late Jurassic Cupressaceae were abundant in warm temperate–tropical regions of the Northern Hemisphere, most abundantly represented by

3575-457: Is also a key socio-cultural component in the practice of their traditional spiritualities , as well as mainstream Abrahamic religions . The prioritisation of the spoken word is evidenced by African societies having chosen to record history orally whilst some had developed or had access to a writing script . Jan Vansina differentiates between oral and literate civilisations, stating: "The attitude of members of an oral society toward speech

3718-565: Is based on standard European ammonite zones, with other regions being calibrated to the European successions. The oldest part of the Jurassic Period has historically been referred to as the Lias or Liassic, roughly equivalent in extent to the Early Jurassic, but also including part of the preceding Rhaetian . The Hettangian Stage was named by Swiss palaeontologist Eugène Renevier in 1864 after Hettange-Grande in north-eastern France. The GSSP for

3861-511: Is dated to the Tithonian, approximately 146.06 ± 0.16 Mya. Another major structure is the Puchezh-Katunki crater , 40 kilometres in diameter, buried beneath Nizhny Novgorod Oblast in western Russia. The impact has been dated to the Sinemurian, 195.9 ± 1.0 Ma. At the beginning of the Jurassic, all of the world's major landmasses were coalesced into the supercontinent Pangaea , which during

4004-493: Is distinct from oral history , which is the recording of personal testimony of those who experienced historical eras or events. Oral tradition is also distinct from the study of orality , defined as thought and its verbal expression in societies where the technologies of literacy (writing and print) are unfamiliar. Folklore is one albeit not the only type of oral tradition. According to John Foley, oral tradition has been an ancient human tradition found in "all corners of

4147-546: Is followed by the Kimmeridgian Warm Interval (KWI) between 164 and 150 million years ago. Based on fossil wood distribution, this was one of the wettest intervals of the Jurassic. The Pangaean interior had less severe seasonal swings than in previous warm periods as the expansion of the Central Atlantic and Western Indian Ocean provided new sources of moisture. A prominent drop in temperatures occurred during

4290-463: Is fourth order, with a periodicity of approximately 410,000 years. During the Early Jurassic the world's oceans transitioned from an aragonite sea to a calcite sea chemistry, favouring the dissolution of aragonite and precipitation of calcite . The rise of calcareous plankton during the Middle Jurassic profoundly altered ocean chemistry, with the deposition of biomineralized plankton on

4433-586: Is going to or coming from Libya . 21°22′00″N 29°19′00″E  /  21.366667°N 29.316667°E  / 21.366667; 29.316667 Jurassic The Jurassic ( / dʒ ʊ ˈ r æ s ɪ k / juurr- ASS -ik ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period 201.4 million years ago (Mya) to the beginning of the Cretaceous Period, approximately 145 Mya. The Jurassic constitutes

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4576-469: Is marked by a globally documented high amplitude negative carbon isotope excursion, as well as the deposition of black shales and the extinction and collapse of carbonate-producing marine organisms, associated with a major rise in global temperatures. The TOAE is often attributed to the eruption of the Karoo-Ferrar large igneous provinces and the associated increase of carbon dioxide concentration in

4719-602: Is marked by the Toarcian Oceanic Anoxic Event , a global episode of oceanic anoxia , ocean acidification , and elevated global temperatures associated with extinctions, likely caused by the eruption of the Karoo-Ferrar large igneous provinces . The end of the Jurassic, however, has no clear, definitive boundary with the Cretaceous and is the only boundary between geological periods to remain formally undefined. By

4862-698: Is named after the city of Aalen in Germany. The Aalenian was defined by Swiss geologist Karl Mayer-Eymar in 1864. The lower boundary was originally between the dark clays of the Black Jurassic and the overlying clayey sandstone and ferruginous oolite of the Brown Jurassic sequences of southwestern Germany. The GSSP for the base of the Aalenian is located at Fuentelsaz in the Iberian range near Guadalajara, Spain , and

5005-513: Is performed. Furthermore, the climate in which traditions are told influences its content. In Burundi , traditions were short because most of them were told at informal gatherings and everyone had to have his say during the evening; in neighbouring Rwanda , many narratives were spun-out because a one-man professional had to entertain his patron for a whole evening, with every production checked by fellow specialists and errors punishable. Frequently, glosses or commentaries were presented parallel to

5148-532: Is similar to the reverence members of a literate society attach to the written word . If it is hallowed by authority or antiquity, the word will be treasured." For centuries in Europe, all data felt to be important were written down, with the most important texts prioritised, such as Bible , and only trivia, such as song, legend, anecdote, and proverbs remained unrecorded. In Africa, all the principal political, legal, social, and religious texts were transmitted orally. When

5291-489: Is testified to by the preservation of the most ancient Indian religious text, the Ṛgveda ( c.  1500 BCE ). Research by Milman Parry and Albert Lord indicates that the verse of the Greek poet Homer has been passed down not by rote memorization but by " oral-formulaic composition ". In this process, extempore composition is aided by use of stock phrases or "formulas" (expressions that are used regularly "under

5434-680: Is the origin of the name of the Kimmeridgian. The stage was named by Alcide d'Orbigny in 1842 in reference to the Kimmeridge Clay . The GSSP for the base of the Kimmeridgian is the Flodigarry section at Staffin Bay on the Isle of Skye , Scotland , which was ratified in 2021. The boundary is defined by the first appearance of ammonites marking the boreal Bauhini Zone and the subboreal Baylei Zone. The Tithonian

5577-399: Is through speech or song and may include folktales , ballads , chants , prose or poetry . The information is mentally recorded by oral repositories , sometimes termed "walking libraries", who are usually also performers. Oral tradition is a medium of communication for a society to transmit oral history , oral literature , oral law and other knowledge across generations without

5720-519: The Bamums in Cameroon invented a script , the first to be written down was the royal chronicle and the code of customary law . Most African courts had archivists who learnt by heart the royal genealogy and history of the state, and served as its unwritten constitution . The performance of a tradition is accentuated and rendered alive by various gesture, social conventions and the unique occasion in which it

5863-742: The Kouyate line of griots . Griots often accompany their telling of oral tradition with a musical instrument, as the Epic of Sundiata is accompanied by the balafon , or as the kora accompanies other traditions. In modern times, some griots and descendants of griots have dropped their historian role and focus on music, with many finding success, however many still maintain their traditional roles. Albanian traditions have been handed down orally across generations. They have been preserved through traditional memory systems that have survived intact into modern times in Albania ,

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6006-611: The Loire Valley of France , lends its name to the Toarcian Stage. The Toarcian was named by Alcide d'Orbigny in 1842, with the original locality being Vrines quarry around 2 km northwest of Thouars. The GSSP for the base of the Toarcian is located at Peniche, Portugal , and was ratified in 2014. The boundary is defined by the first appearance of ammonites belonging to the subgenus Dactylioceras ( Eodactylites ) . The Aalenian

6149-476: The Nubian Sandstone Aquifer System . The flora of Selima is not particularly varied and includes grasses ( Desmostachya bipinnata and Imperata cylindrica ), reeds ( Phragmites australis ), camelthorn ( Alhagi maurorum ), date palm ( Phoenix dactylifera ), dom palm ( Hyphaene thebaica ) and several species of tamarisk ( Tamarix ). Although upwards of 2500 date palms were counted in

6292-696: The Swabian Alb , near Stuttgart , Germany. The GSSP for the base of the Pliensbachian is found at the Wine Haven locality in Robin Hood's Bay , Yorkshire , England, in the Redcar Mudstone Formation , and was ratified in 2005. The beginning of the Pliensbachian is defined by the first appearance of the ammonite Bifericeras donovani . The village Thouars (Latin: Toarcium ), just south of Saumur in

6435-502: The attributes of Allah —all-mighty, all-wise, all-knowing, all-high, etc.—often found as doublets at the end of a verse. Among the other repeated phrases are "Allah created the heavens and the earth" (found 19 times in the Quran). As much as one third of the Quran is made up of "oral formulas", according to Dundes' estimates. Bannister, using a computer database of (the original Arabic) words of

6578-643: The oral word and widespread use of oral tradition. Oral tradition is memories, knowledge, and expression held in common by a group over many generations: it is the long preservation of immediate or contemporaneous testimony . It may be defined as the recall and transmission of specific, preserved textual and cultural knowledge through vocal utterance. Oral tradition is usually popular, and can be exoteric or esoteric . It speaks to people according to their understanding, unveiling itself in accordance with their aptitudes. As an academic discipline , oral tradition refers both to objects and methods of study. It

6721-566: The "loveliest of all the Libyan oases". Only minor archaeological work was done at Selima in the 1970s and 1980s. The first major excavations were undertaken by the Selima Oasis Project in 2011, 2013 and 2014. Atop a mound about 200 metres (660 ft) southeast of the oasis vegetation lies the Beit es-Selima, the ruins of an ancient multi-roomed stone structure. Carbon dating and potsherds put

6864-568: The Aalenian, precessionally forced climatic changes dictated peatland wildfire magnitude and frequency. The European climate appears to have become noticeably more humid at the Aalenian-Bajocian boundary but then became more arid during the middle Bajocian. A transient ice age possibly occurred in the late Bajocian. The Callovian-Oxfordian boundary at the end of the MJCI witnessed particularly notable global cooling, potentially even an ice age. This

7007-763: The Bathonian is defined by the first appearance of the ammonite Gonolkites convergens , at the base of the Zigzagiceras zigzag ammonite zone . The Callovian is derived from the Latinized name of the village of Kellaways in Wiltshire , England, and was named by Alcide d'Orbigny in 1852, originally the base at the contact between the Forest Marble Formation and the Cornbrash Formation . However, this boundary

7150-655: The Callovian–Oxfordian boundary, peaking possibly as high as 140 metres above present sea level at the Kimmeridgian–Tithonian boundary. The sea levels falls in the late Tithonian, perhaps to around 100 metres, before rebounding to around 110 metres at the Tithonian–Berriasian boundary. The sea level within the long-term trends across the Jurassic was cyclical, with 64 fluctuations, 15 of which were over 75 metres. The most noted cyclicity in Jurassic rocks

7293-559: The Cretaceous. The continents were surrounded by Panthalassa , with the Tethys Ocean between Gondwana and Asia. At the end of the Triassic, there was a marine transgression in Europe, flooding most parts of central and western Europe transforming it into an archipelago of islands surrounded by shallow seas. During the Jurassic, both the North and South Pole were covered by oceans. Beginning in

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7436-622: The Early Jurassic began to break up into northern supercontinent Laurasia and the southern supercontinent Gondwana . The rifting between North America and Africa was the first to initiate, beginning in the early Jurassic, associated with the emplacement of the Central Atlantic Magmatic Province . During the Jurassic, the North Atlantic Ocean remained relatively narrow, while the South Atlantic did not open until

7579-634: The Early Jurassic, the Boreal Ocean was connected to the proto-Atlantic by the "Viking corridor" or Transcontinental Laurasian Seaway, a passage between the Baltic Shield and Greenland several hundred kilometers wide. During the Callovian, the Turgai Epicontinental Sea formed, creating a marine barrier between Europe and Asia. Madagascar and Antarctica began to rift away from Africa during

7722-625: The Jurassic into ten stages based on ammonite and other fossil assemblages in England and France, of which seven are still used, but none has retained its original definition. The German geologist and palaeontologist Friedrich August von Quenstedt in 1858 divided the three series of von Buch in the Swabian Jura into six subdivisions defined by ammonites and other fossils. The German palaeontologist Albert Oppel in his studies between 1856 and 1858 altered d'Orbigny's original scheme and further subdivided

7865-477: The Jurassic of Asia has strap-shaped ginkgo-like leaves with highly distinct reproductive structures with similarities to those of peltasperm and corystosperm seed ferns, has been suggested to be a member of Ginkgoales sensu lato. Oral tradition Oral tradition , or oral lore , is a form of human communication in which knowledge, art, ideas and culture are received, preserved, and transmitted orally from one generation to another. The transmission

8008-411: The Jurassic, evolving from a branch of theropod dinosaurs. Other major events include the appearance of the earliest crabs and modern frogs , salamanders and lizards . Mammaliaformes , one of the few cynodont lineages to survive the end of the Triassic, continued to diversify throughout the period, with the Jurassic seeing the emergence of the first crown group mammals . Crocodylomorphs made

8151-407: The Late Jurassic (Kimmeridgian) of Scotland, which remains the only known unequivocal fossil of the group before the Cretaceous. Despite being the earliest known member of the Pinaceae, Eathiestrobus appears to be a member of the pinoid clade of the family, suggesting that the initial diversification of Pinaceae occurred earlier than has been found in the fossil record. The earliest record of

8294-416: The Middle Jurassic. Also abundant during the Jurassic is the extinct family Cheirolepidiaceae , often recognised through their highly distinctive Classopolis pollen. Jurassic representatives include the pollen cone Classostrobus and the seed cone Pararaucaria . Araucarian and Cheirolepidiaceae conifers often occur in association. The oldest definitive record of the cypress family ( Cupressaceae )

8437-445: The Middle to Late Jurassic, corresponding to the increasing aridity of the region. Ginkgoales , of which the sole living species is Ginkgo biloba , were more diverse during the Jurassic: they were among the most important components of Eurasian Jurassic floras and were adapted to a wide variety of climatic conditions. The earliest representatives of the genus Ginkgo , represented by ovulate and pollen organs similar to those of

8580-405: The North Atlantic Ocean with eastern Panthalassa. Palaeontological data suggest that the seaway had been open since the Early Jurassic. As part of the Nevadan orogeny , which began during the Triassic, the Cache Creek Ocean closed, and various terranes including the large Wrangellia Terrane accreted onto the western margin of North America. By the Middle Jurassic the Siberian plate and

8723-462: The North China-Amuria block had collided, resulting in the closure of the Mongol-Okhotsk Ocean . During the Early Jurassic, around 190 million years ago, the Pacific Plate originated at the triple junction of the Farallon , Phoenix , and Izanagi tectonic plates , the three main oceanic plates of Panthalassa. The previously stable triple junction had converted to an unstable arrangement surrounded on all sides by transform faults because of

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8866-413: The Oxfordian lacks a defined GSSP. W. J. Arkell in studies in 1939 and 1946 placed the lower boundary of the Oxfordian as the first appearance of the ammonite Quenstedtoceras mariae (then placed in the genus Vertumniceras ). Subsequent proposals have suggested the first appearance of Cardioceras redcliffense as the lower boundary. The village of Kimmeridge on the coast of Dorset , England,

9009-474: The Qur'anic text was generated." Dundes argues oral-formulaic composition is consistent with "the cultural context of Arabic oral tradition", quoting researchers who have found poetry reciters in the Najd (the region next to where the Quran was revealed) using "a common store of themes, motives, stock images, phraseology and prosodical options", and "a discursive and loosely structured" style "with no fixed beginning or end" and "no established sequence in which

9152-490: The Quran and of their "grammatical role, root, number, person, gender and so forth", estimates that depending on the length of the phrase searched, somewhere between 52% (three word phrases) and 23% (five word phrases) are oral formulas. Dundes reckons his estimates confirm "that the Quran was orally transmitted from its very beginnings". Bannister believes his estimates "provide strong corroborative evidence that oral composition should be seriously considered as we reflect upon how

9295-520: The Quran from memory, not reading, the predominant mode of teaching it to others. To this day the Quran is memorized by millions and its recitation can be heard throughout the Muslim world from recordings and mosque loudspeakers (during Ramadan ). Muslims state that some who teach memorization/recitation of the Quran constitute the end of an "un-broken chain" whose original teacher was Muhammad himself. It has been argued that "the Qur'an's rhythmic style and eloquent expression make it easy to memorize," and

9438-424: The Sudan". On and around the Beit es-Selima are numerous inscriptions and engravings. These include writing in Arabic and Libyco-Berber , but not Greek or Coptic . Some signs might be camel brands or tribal markings. There are also a few figural engravings. They show that Selima was in contact with the Kharga Oasis, the Dakhla Oasis and the Darfur . In 1928, the archaeologist Thomas Leach reported that salt

9581-502: The TOAE represented one of the most severe extinctions in their evolutionary history. While the event had significant impact on marine invertebrates, it had little effect on marine reptiles. During the TOAE, the Sichuan Basin was transformed into a giant lake , probably three times the size of modern-day Lake Superior , represented by the Da'anzhai Member of the Ziliujing Formation . The lake likely sequestered ~460 gigatons (Gt) of organic carbon and ~1,200 Gt of inorganic carbon during

9724-414: The Tithonian, known as the Early Tithonian Cooling Event (ETCE). The end of the Jurassic was marked by the Tithonian–early Barremian Cool Interval (TBCI), beginning 150 million years ago and continuing into the Early Cretaceous . The Toarcian Oceanic Anoxic Event (TOAE), also known as the Jenkyns Event, was an episode of widespread oceanic anoxia during the early part of the Toarcian Age, c. 183 Mya. It

9867-529: The Toarcian around 174 million years ago. During the Toarcian Warm Interval, ocean surface temperatures likely exceeded 30 °C (86 °F), and equatorial and subtropical (30°N–30°S) regions are likely to have been extremely arid, with temperatures in the interior of Pangea likely in excess of 40 °C (104 °F).The Toarcian Warm Interval is followed by the Middle Jurassic Cool Interval (MJCI) between 174 and 164 million years ago, which may have been punctuated by brief, ephemeral icehouse intervals. During

10010-405: The Vedangas. Each text was recited in a number of ways, to ensure that the different methods of recitation acted as a cross check on the other. Pierre-Sylvain Filliozat summarizes this as: These extraordinary retention techniques guaranteed an accurate Śruti, fixed across the generations, not just in terms of unaltered word order but also in terms of sound. That these methods have been effective,

10153-416: The ancient Greek and Roman civilizations were an exclusive product of an oral tradition. An Irish seanchaí (plural: seanchaithe ), meaning bearer of "old lore" , was a traditional Irish language storyteller (the Scottish Gaelic equivalent being the seanchaidh, anglicised as shanachie). The job of a seanchaí was to serve the head of a lineage by passing information orally from one generation to

10296-475: The atmosphere, as well as the possible associated release of methane clathrates . This likely accelerated the hydrological cycle and increased silicate weathering , as evidenced by an increased amount of organic matter of terrestrial origin found in marine deposits during the TOAE. Groups affected include ammonites, ostracods , foraminifera , bivalves , cnidarians , and especially brachiopods , for which

10439-595: The base of the Hettangian is located at the Kuhjoch Pass, Karwendel Mountains , Northern Calcareous Alps , Austria; it was ratified in 2010. The beginning of the Hettangian, and thus the Jurassic as a whole, is marked by the first appearance of the ammonite Psiloceras spelae tirolicum in the Kendlbach Formation exposed at Kuhjoch. The base of the Jurassic was previously defined as the first appearance of Psiloceras planorbis by Albert Oppel in 1856–58, but this

10582-539: The beginning of the Jurassic, the supercontinent Pangaea had begun rifting into two landmasses: Laurasia to the north and Gondwana to the south. The climate of the Jurassic was warmer than the present, and there were no ice caps . Forests grew close to the poles, with large arid expanses in the lower latitudes. On land, the fauna transitioned from the Triassic fauna, dominated jointly by dinosauromorph and pseudosuchian archosaurs , to one dominated by dinosaurs alone. The first stem-group birds appeared during

10725-557: The building in use during the Nubian early (AD 600–850) and classical (AD 850–1100) Christian periods. Most pottery recovered was wheel-made and a few decorated pieces were from Aswan . Although not originally fortified, the building dominates the surrounding countryside and in the early 20th century was used a police watchtower or fort ( tabia ) by the Anglo-Egyptian administration . Theories about its purpose abound. It has been described as

10868-464: The corrupt and uncorrupted hadith, this other source of revelation is not nearly so free of corruption because of the hadith's great political and theological influence.) At least two non-Muslim scholars ( Alan Dundes and Andrew G. Bannister) have examined the possibility that the Quran was not just "recited orally, but actually composed orally". Bannister postulates that some parts of the Quran—such as

11011-477: The dawn of the Cretaceous. The base of the Tithonian currently lacks a GSSP. The working definition for the base of the Tithonian is the first appearance of the ammonite genus Gravesia . The upper boundary of the Jurassic is currently undefined, and the Jurassic–Cretaceous boundary is currently the only system boundary to lack a defined GSSP. Placing a GSSP for this boundary has been difficult because of

11154-679: The end of the Jurassic. The oldest unambiguous members of Podocarpaceae are known from the Jurassic, found across both hemispheres, including Scarburgia and Harrisiocarpus from the Middle Jurassic of England, as well as unnamed species from the Middle-Late Jurassic of Patagonia. During the Early Jurassic, the flora of the mid-latitudes of Eastern Asia were dominated by the extinct deciduous broad leafed conifer Podozamites , which appears to not be closely related to any living family of conifer. Its range extended northwards into polar latitudes of Siberia and then contracted northward in

11297-635: The end of the Triassic, the Peltaspermaceae became extinct in most parts of the world, with Lepidopteris persisting into the Early Jurassic in Patagonia. Dicroidium , a corystosperm seed fern that was a dominant part of Gondwanan floral communities during the Triassic, also declined at the Triassic–Jurassic boundary, surviving as a relict in Antarctica into the Early Jurassic. Conifers formed

11440-441: The episodes must follow".{{ref|group=Note|Scholar Saad Sowayan referring to the genre of "Saudi Arabian historical oral narrative genre called suwalif ". The Catholic Church upholds that its teaching contained in its deposit of faith is transmitted not only through scripture , but as well as through sacred tradition . The Second Vatican Council affirmed in Dei verbum that

11583-417: The event. Seawater pH , which had already substantially decreased prior to the event, increased slightly during the early stages of the TOAE, before dropping to its lowest point around the middle of the event. This ocean acidification is the probable cause of the collapse of carbonate production. Additionally, anoxic conditions were exacerbated by enhanced recycling of phosphorus back into ocean water as

11726-501: The evidence for this is primarily European, probably controlled by changes in eustatic sea level. There is no evidence of a mass extinction of plants at the Triassic–Jurassic boundary. At the Triassic–Jurassic boundary in Greenland, the sporomorph (pollen and spores) record suggests a complete floral turnover. An analysis of macrofossil floral communities in Europe suggests that changes were mainly due to local ecological succession . At

11869-414: The first appearance of the ammonite Hyperlioceras mundum . The Bathonian is named after the city of Bath , England, introduced by Belgian geologist d'Omalius d'Halloy in 1843, after an incomplete section of oolitic limestones in several quarries in the region. The GSSP for the base of the Bathonian is Ravin du Bès, Bas-Auran area, Alpes de Haute Provence , France; it was ratified in 2009. The base of

12012-768: The first by comparing inconsistencies in the transmitted versions of literature from various oral societies such as the Greek, Serbia and other cultures, then noting that the Vedic literature is too consistent and vast to have been composed and transmitted orally across generations, without being written down. In the Middle East, Arabic oral tradition has significantly influenced literary and cultural practices. Arabic oral tradition encompassed various forms of expression, including metrical poetry , unrhymed prose , rhymed prose ( saj' ), and prosimetrum —a combination of prose and poetry often employed in historical narratives. Poetry held

12155-622: The folk epics known as siyar (singular: sīra) were considered the most intricate. These prosimetric narratives, combining prose and verse, emerged in the early Middle Ages. While many such epics circulated historically, only one has survived as a sung oral poetic tradition: Sīrat Banī Hilāl . This epic recounts the westward migration and conquests of the Banu Hilal Bedouin tribe from the 10th to 12th centuries, culminating in their rule over parts of North Africa before their eventual defeat. The historical roots of Sīrat Banī Hilāl are evident in

12298-566: The generations. Many forms of recitation or pathas were designed to aid accuracy in recitation and the transmission of the Vedas and other knowledge texts from one generation to the next. All hymns in each Veda were recited in this way; for example, all 1,028 hymns with 10,600 verses of the Rigveda was preserved in this way; as were all other Vedas including the Principal Upanishads , as well as

12441-514: The genus Berriasella , but its use as a stratigraphic indicator has been questioned, as its first appearance does not correlate with that of C. alpina . The Kimmeridge Clay and equivalents are the major source rock for the North Sea oil . The Arabian Intrashelf Basin, deposited during the Middle and Late Jurassic, is the setting of the world's largest oil reserves, including the Ghawar Field ,

12584-402: The genus Elatides . The Jurassic also saw the first appearances of some modern genera of cypresses, such as Sequoia . Members of the extinct genus Schizolepidopsis which likely represent a stem-group to the pine family ( Pinaceae ), were widely distributed across Eurasia during the Jurassic. The oldest unambiguous record of Pinaceae is the pine cone Eathiestrobus , known from

12727-860: The help of elaborate mnemonic techniques : According to Goody, the Vedic texts likely involved both a written and oral tradition, calling it a "parallel products of a literate society". Mostly recently, research shows that oral performance of (written) texts could be a philosophical activity in early China . It is a common knowledge in India that the primary Hindu books called Vedas are great example of Oral tradition. Pundits who memorized three Vedas were called Trivedis. Pundits who memorized four vedas were called Chaturvedis. By transferring knowledge from generation to generation Hindus protected their ancient Mantras in Vedas, which are basically Prose. The early Buddhist texts are also generally believed to be of oral tradition, with

12870-526: The human intellect, and the memory to retain information and sharpen imagination. Perhaps the most famous repository of oral tradition is the west African griot (named differently in different languages). The griot is a hereditary position and exists in Dyula , Soninke , Fula , Hausa , Songhai , Wolof , Serer , and Mossi societies among many others, although more famously in Mandinka society . They constitute

13013-459: The importance of storytelling in preserving Roman history . Valerius Maximus also references oral tradition in Memorable Doings and Sayings (2.1.10). Wiseman argues that celebratory performances served as a vital medium for transmitting Roman history and that such traditions evolved into written forms by the third century CE. He asserts that the history of figures like the house of Tarquin

13156-479: The introduction of text , oral tradition remained the only means of communication in order to establish societies as well as its institutions. Despite widespread comprehension of literacy in the recent century, oral tradition remains the dominant communicative means within the world. All indigenous African societies use oral tradition to learn their origin and history , civic and religious duties, crafts and skills, as well as traditional myths and legends . It

13299-451: The last survivor of the Balkan traditions. "All ancient Greek literature", states Steve Reece, "was to some degree oral in nature, and the earliest literature was completely so". Homer 's epic poetry, states Michael Gagarin, "was largely composed, performed and transmitted orally". As folklores and legends were performed in front of distant audiences, the singers would substitute the names in

13442-585: The late Early Jurassic in association with the eruption of the Karoo-Ferrar large igneous provinces , opening the western Indian Ocean and beginning the fragmentation of Gondwana. At the beginning of the Jurassic, North and South America remained connected, but by the beginning of the Late Jurassic they had rifted apart to form the Caribbean Seaway, also known as the Hispanic Corridor, which connected

13585-467: The late Sinemurian–Pliensbachian before regressing to near present levels by the late Pliensbachian. There seems to have been a gradual rise to a peak of ~75 m above present sea level during the Toarcian. During the latest part of the Toarcian, the sea level again dropped by several tens of metres. It progressively rose from the Aalenian onwards, aside from dips of a few tens of metres in the Bajocian and around

13728-664: The lived experience of earthquakes and floods within tribal memory. According to one story from the Suquamish Tribe , Agate Pass was created when an earthquake expanded the channel as a result of an underwater battle between a serpent and bird. Other stories in the region depict the formation of glacial valleys and moraines and the occurrence of landslides, with stories being used in at least one case to identify and date earthquakes that occurred in 900 CE and 1700. Further examples include Arikara origin stories of emergence from an "underworld" of persistent darkness, which may represent

13871-487: The long and short syllables are repeated by certain rules, so that if an error or inadvertent change is made, an internal examination of the verse reveals the problem. Oral traditions can be passed on through plays and acting, as shown in modern-day Cameroon by the Graffis or Grasslanders who perform and deliver speeches to teach their history through oral tradition. Such strategies facilitate transmission of information without

14014-452: The lower boundary of the stage. The ages of the Jurassic from youngest to oldest are as follows: Jurassic stratigraphy is primarily based on the use of ammonites as index fossils . The first appearance datum of specific ammonite taxa is used to mark the beginnings of stages, as well as smaller timespans within stages, referred to as "ammonite zones"; these, in turn, are also sometimes subdivided further into subzones. Global stratigraphy

14157-667: The middle period of the Mesozoic Era as well as the eighth period of the Phanerozoic Eon and is named after the Jura Mountains , where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event , associated with the eruption of the Central Atlantic Magmatic Province (CAMP). The beginning of the Toarcian Age started around 183 million years ago and

14300-418: The millennium have taught us anything, it must be that oral tradition never was the other we accused it of being; it never was the primitive, preliminary technology of communication we thought it to be. Rather, if the whole truth is told, oral tradition stands out as the single most dominant communicative technology of our species as both a historical fact and, in many areas still, a contemporary reality. Before

14443-428: The modern species, are known from the Middle Jurassic in the Northern Hemisphere. Several other lineages of ginkgoaleans are known from Jurassic rocks, including Yimaia , Grenana , Nagrenia and Karkenia . These lineages are associated with Ginkgo- like leaves, but are distinguished from living and fossil representatives of Ginkgo by having differently arranged reproductive structures. Umaltolepis from

14586-408: The most promising candidates for fixing the Jurassic–Cretaceous boundary In particular, the first appearance Calpionella alpina , co-inciding with the base of the eponymous Alpina subzone, has been proposed as the definition of the base of the Cretaceous. The working definition for the boundary has often been placed as the first appearance of the ammonite Strambergella jacobi , formerly placed in

14729-494: The narrative, sometimes answering questions from the audience to ensure understanding, although often someone would learn a tradition without asking their master questions and not really understand the meaning of its content, leading them to speculate in the commentary. Oral traditions only exist when they are told, except for in people's minds, and so the frequency of telling a tradition aids its preservation. These African ethnic groups also utilize oral tradition to develop and train

14872-416: The next about Irish folklore and history, particularly in medieval times. The potential for oral transmission of history in ancient Rome is evidenced primarily by Cicero , who discusses the significance of oral tradition in works such as Brutus , Tusculan Disputations , and On The Orator . While Cicero ’s reliance on Cato’s Origines may limit the breadth of his argument, he nonetheless highlights

15015-481: The oasis date back to the 16th century and all describe the place as having easy access to water. Potable water is found 70–80 centimetres (2.3–2.6 ft) below the surface. In the early 19th century, Frédéric Cailliaud found three wells in use at Selima and three wells are still in use today. The archaeologist William Boyd Kennedy Shaw , who visited Selima during his circuit of the Libyan Desert in 1935, called it

15158-547: The oasis in 1902, just over 1000 were found in 2011. Dates have never been an important part of the economy of the oasis. Selima has been in use for millennia as a waypoint for travellers to bypass the Second Cataract . Pottery of the Mesolithic Early Khartoum culture has been found at Selima. The Egyptian official Harkhuf almost certainly used it on his trading missions to Kerma . Traveller's descriptions of

15301-422: The ocean floor acting as a buffer against large CO 2 emissions. The climate of the Jurassic was generally warmer than that of present, by around 5–10 °C (9–18 °F), with atmospheric carbon dioxide likely about four times higher. Intermittent "cold snap" intervals are known to have occurred during this time period, however, interrupting the otherwise warm greenhouse climate. Forests likely grew near

15444-455: The oceans, resulting in large areas of desert and scrubland in the lower latitudes between 40° N and S of the equator. Tropical rainforest and tundra biomes are likely to have been rare or absent. The Jurassic also witnessed the decline of the Pangaean megamonsoon that had characterised the preceding Permian and Triassic periods. Variation in the frequency of wildfire activity in the Jurassic

15587-468: The oldest oral traditions in existence. A basalt stone axe found underneath volcanic ash in 1947 had already proven that humans inhabited the region before the eruption of Tower Hill. Native American society was always reliant upon oral tradition, if not storytelling , in order to convey knowledge, morals and traditions amongst others, a trait Western settlers deemed as representing an inferior race without neither culture nor history, often cited as

15730-405: The oral passing of what had been revealed through Christ through their preaching as teachers. Jan Vansina , who specialised in the history of Central Africa , pioneered the study of oral tradition in his book Oral tradition as history (1985). Vansina differentiates between oral and literate civilisations, depending on whether emphasis is placed on the sanctity of the written or oral word in

15873-530: The overall meaning. In this way, the rules that govern the people are modified by the whole and not authored by a single entity. Ancient texts of Hinduism , Buddhism and Jainism were preserved and transmitted by an oral tradition. For example, the śrutis of Hinduism called the Vedas , the oldest of which trace back to the second millennium BCE. Michael Witzel explains this oral tradition as follows: The Vedic texts were orally composed and transmitted, without

16016-551: The period, as well as other groups like the extinct Bennettitales . The chronostratigraphic term "Jurassic" is linked to the Jura Mountains , a forested mountain range that mainly follows the France–Switzerland border . The name "Jura" is derived from the Celtic root * jor via Gaulish *iuris "wooded mountain", which was borrowed into Latin as a name of a place and evolved into Juria and finally Jura . During

16159-607: The poles, where they experienced warm summers and cold, sometimes snowy winters; there were unlikely to have been ice sheets given the high summer temperatures that prevented the accumulation of snow, though there may have been mountain glaciers. Dropstones and glendonites in northeastern Siberia during the Early to Middle Jurassic indicate cold winters. The ocean depths were likely 8 °C (14 °F) warmer than present, and coral reefs grew 10° of latitude further north and south. The Intertropical Convergence Zone likely existed over

16302-419: The present-day distribution of groups claiming descent from the tribe across North Africa and parts of the Middle East. The epic's development into a cohesive narrative was first documented by the historian Ibn Khaldūn in the 14th century. In his writings, Ibn Khaldūn describes collecting stories and poems from nomadic Arabs, using these oral sources to discuss the merits of colloquial versus classical poetry and

16445-649: The remembrance of life in the Arctic Circle during the last ice age, and stories involving a "deep crevice", which may refer to the Grand Canyon. Despite such examples of agreement between geological and archeological records on one hand and Native oral records on the other, some scholars have cautioned against the historical validity of oral traditions because of their susceptibility to detail alteration over time and lack of precise dates. The Native American Graves Protection and Repatriation Act considers oral traditions as

16588-485: The rocks of the Jurassic into a stratigraphic set of units called stages , each formed during corresponding time intervals called ages. Stages can be defined globally or regionally. For global stratigraphic correlation, the International Commission on Stratigraphy (ICS) ratify global stages based on a Global Boundary Stratotype Section and Point (GSSP) from a single formation (a stratotype ) identifying

16731-586: The same metrical conditions, to express a particular essential idea"). In the case of the work of Homer, formulas included eos rhododaktylos ("rosy fingered dawn") and oinops pontos ("winedark sea") which fit in a modular fashion into the poetic form (in this case six-colon Greek hexameter). Since the development of this theory, of oral-formulaic composition has been "found in many different time periods and many different cultures", and according to another source (John Miles Foley) "touch[ed] on" over 100 "ancient, medieval and modern traditions." The most recent of

16874-504: The seven re-tellings of the story of the Iblis and Adam , and the repeated phrases "which of the favours of your Lord will you deny?" in sura 55—make more sense addressed to listeners than readers. Banister, Dundes and other scholars (Shabbir Akhtar, Angelika Neuwirth, Islam Dayeh) have also noted the large amount of "formulaic" phraseology in the Quran consistent with " oral-formulaic composition " mentioned above. The most common formulas are

17017-517: The stages into biostratigraphic zones, based primarily on ammonites. Most of the modern stages of the Jurassic were formalized at the Colloque du Jurassique à Luxembourg in 1962. The Jurassic Period is divided into three epochs : Early, Middle, and Late. Similarly, in stratigraphy , the Jurassic is divided into the Lower Jurassic , Middle Jurassic , and Upper Jurassic series . Geologists divide

17160-408: The stories with local characters or rulers to give the stories a local flavor and thus connect with the audience, but making the historicity embedded in the oral tradition unreliable. The lack of surviving texts about the Greek and Roman religious traditions have led scholars to presume that these were ritualistic and transmitted as oral traditions, but some scholars disagree that the complex rituals in

17303-419: The storyteller's objective at the time. One's rendition of a story was often considered a response to another's rendition, with plot alterations suggesting alternative ways of applying traditional ideas to present conditions. Listeners might have heard the story told many times, or even may have told the same story themselves. This does not take away from a story's meaning, as curiosity about what happens next

17446-429: The strong regionality of most biostratigraphic markers, and lack of any chemostratigraphic events, such as isotope excursions (large sudden changes in ratios of isotopes ), that could be used to define or correlate a boundary. Calpionellids , an enigmatic group of planktonic protists with urn-shaped calcitic tests briefly abundant during the latest Jurassic to earliest Cretaceous, have been suggested to represent

17589-476: The teachings of Jesus Christ were initially passed on to early Christians by "the Apostles who, by their oral preaching, by example, and by observance handed on what they had received from the lips of Christ, from living with Him, and from what He did". The Catholic Church asserts that this mode of transmission of the faith persists through current-day bishops , who by right of apostolic succession , have continued

17732-572: The three-fold division of the Jurassic, originally named from oldest to the youngest: the Black Jurassic , Brown Jurassic , and White Jurassic . The term " Lias " had previously been used for strata of equivalent age to the Black Jurassic in England by William Conybeare and William Phillips in 1822. William Phillips, the geologist, worked with William Conybeare to find out more about the Black Jurassic in England. The French palaeontologist Alcide d'Orbigny in papers between 1842 and 1852 divided

17875-500: The transition from a terrestrial to an aquatic life. The oceans were inhabited by marine reptiles such as ichthyosaurs and plesiosaurs , while pterosaurs were the dominant flying vertebrates . Modern sharks and rays first appeared and diversified during the period, while the first known crown-group teleost fish appeared near the end of the period. The flora was dominated by ferns and gymnosperms , including conifers , of which many modern groups made their first appearance during

18018-650: The use of script, in an unbroken line of transmission from teacher to student that was formalized early on. This ensured an impeccable textual transmission superior to the classical texts of other cultures; it is, in fact, something like a tape-recording ... Not just the actual words, but even the long-lost musical (tonal) accent (as in old Greek or in Japanese) has been preserved up to the present. Ancient Indians developed techniques for listening, memorization and recitation of their knowledge, in schools called Gurukul , while maintaining exceptional accuracy of their knowledge across

18161-661: The value of oral histories in written historical works. The Torah and other ancient Jewish literature, the Judeo-Christian Bible and texts of early centuries of Christianity are rooted in an oral tradition, and the term "People of the Book" is a medieval construct. This is evidenced, for example, by the multiple scriptural statements by Paul admitting "previously remembered tradition which he received" orally. Australian Aboriginal culture has thrived on oral traditions and oral histories passed down through thousands of years. In

18304-440: The world". Modern archaeology has been unveiling evidence of the human efforts to preserve and transmit arts and knowledge that depended completely or partially on an oral tradition, across various cultures: The Judeo-Christian Bible reveals its oral traditional roots; medieval European manuscripts are penned by performing scribes; geometric vases from archaic Greece mirror Homer's oral style. (...) Indeed, if these final decades of

18447-704: The world's largest oil field. The Jurassic-aged Sargelu and Naokelekan formations are major source rocks for oil in Iraq . Over 1500 gigatons of Jurassic coal reserves are found in north-west China, primarily in the Turpan-Hami Basin and the Ordos Basin . Major impact structures include the Morokweng impact structure , a 70 km diameter impact structure buried beneath the Kalahari desert in northern South Africa. The impact

18590-453: The world's major religions, Islam claims two major sources of divine revelation—the Quran and hadith —compiled in written form relatively shortly after being revealed: The oral milieu in which the sources were revealed, and their oral form in general are important. The Arab poetry that preceded the Quran and the hadith were orally transmitted. Few Arabs were literate at the time and paper

18733-581: The yew family ( Taxaceae ) is Palaeotaxus rediviva , from the Hettangian of Sweden, suggested to be closely related to the living Austrotaxus , while Marskea jurassica from the Middle Jurassic of Yorkshire, England and material from the Callovian–Oxfordian Daohugou Bed in China are thought to be closely related to Amentotaxus , with the latter material assigned to the modern genus, indicating that Taxaceae had substantially diversified by

18876-399: Was changed as the appearance was seen as too localised an event for an international boundary. The Sinemurian Stage was first defined and introduced into scientific literature by Alcide d'Orbigny in 1842. It takes its name from the French town of Semur-en-Auxois , near Dijon . The original definition of Sinemurian included what is now the Hettangian. The GSSP of the Sinemurian is located at

19019-557: Was governed by the 405 kyr eccentricity cycle. Thanks to the breakup of Pangaea, the hydrological cycle during the Jurassic was significantly enhanced. The beginning of the Jurassic was likely marked by a thermal spike corresponding to the Triassic–Jurassic extinction and eruption of the Central Atlantic magmatic province. The first part of the Jurassic was marked by the Early Jurassic Cool Interval between 199 and 183 million years ago. It has been proposed that glaciation

19162-418: Was introduced in scientific literature by Albert Oppel in 1865. The name Tithonian is unusual in geological stage names because it is derived from Greek mythology rather than a place name. Tithonus was the son of Laomedon of Troy and fell in love with Eos , the Greek goddess of dawn . His name was chosen by Albert Oppel for this stratigraphical stage because the Tithonian finds itself hand in hand with

19305-472: Was known for his justification of the oral tradition and criticism of the written word. Stories are used to preserve and transmit both tribal history and environmental history, which are often closely linked. Native oral traditions in the Pacific Northwest, for example, describe natural disasters like earthquakes and tsunamis. Various cultures from Vancouver Island and Washington have stories describing

19448-460: Was later found to be within the upper part of the Bathonian. The base of the Callovian does not yet have a certified GSSP. The working definition for the base of the Callovian is the first appearance of ammonites belonging to the genus Kepplerites . The Oxfordian is named after the city of Oxford in England and was named by Alcide d'Orbigny in 1844 in reference to the Oxford Clay . The base of

19591-434: Was less of a priority than hearing fresh perspectives on well-known themes and plots. Elder storytellers generally were not concerned with discrepancies between their version of historical events and neighboring tribes' version of similar events, such as in origin stories. Tribal stories are considered valid within the tribe's own frame of reference and tribal experience. The 19th century Oglala Lakota tribal member Four Guns

19734-451: Was likely passed down through oral storytelling for centuries before being recorded in literature. Although Flower critiques the lack of ancient evidence supporting Wiseman's broader claims, Wiseman maintains that dramatic narratives fundamentally shaped historiography. In Asia, the transmission of folklore, mythologies as well as scriptures in ancient India, in different Indian religions, was by oral tradition, preserved with precision with

19877-475: Was made so to facilitate the "preservation and remembrance" of the work. Islamic doctrine holds that from the time it was revealed to the present day, the Quran has not been altered, its continuity from divine revelation to its current written form insured by the large numbers of Muhammad's supporters who had reverently memorized the work, a careful compiling process and divine intervention. (Muslim scholars agree that although scholars have worked hard to separate

20020-564: Was mined at Selima by groups who came by donkey and camel from Sukkot, Argo Island and the Mahas . The salt caravans followed a track from Sagiat el-Abd in the Nile valley. According to oral tradition recorded in the vicinity of the Dal Cataract in 2014, the last salt caravan took place in 1980. Today there is a military post, a police office and a customs station at Selima. Most traffic passing through

20163-483: Was not available in the Middle East. The written Quran is said to have been created in part through memorization by Muhammad's companions , and the decision to create a standard written work is said to have come after the death in battle ( Yamama ) of a large number of Muslims who had memorized the work. For centuries, copies of the Qurans were transcribed by hand, not printed, and their scarcity and expense made reciting

20306-478: Was present in the Northern Hemisphere during both the early Pliensbachian and the latest Pliensbachian. There was a spike in global temperatures of around 4–8 °C (7–14 °F) during the early part of the Toarcian corresponding to the Toarcian Oceanic Anoxic Event and the eruption of the Karoo-Ferrar large igneous provinces in southern Gondwana, with the warm interval extending to the end of

20449-571: Was ratified in 2000. The base of the Aalenian is defined by the first appearance of the ammonite Leioceras opalinum . Alcide d'Orbigny in 1842 named the Bajocian Stage after the town of Bayeux (Latin: Bajoce ) in Normandy, France. The GSSP for the base of the Bajocian is located in the Murtinheira section at Cabo Mondego , Portugal; it was ratified in 1997. The base of the Bajocian is defined by

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