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111-609: The Omineca Arc or Omineca Belt was a Jurassic through Cretaceous volcanic arc terrane in western North America , extending from Alaska through Yukon and British Columbia to Washington . The Omineca is bounded by the Foreland Belt to the east and the Intermontane Belt to the west. It is named after the Omineca Mountains of north-central British Columbia. This volcanology article

222-682: A "ten-night festival of ( Apollo ) Grannus ", decamnoctiacis Granni , is mentioned in a Latin inscription from Limoges . A similar formation is to be found in the Coligny calendar, in which mention is made of a trinox[...] Samoni "three-night (festival?) of (the month of) Samonios". As is to be expected, the ancient Gaulish language was more similar to Latin than modern Celtic languages are to modern Romance languages. The ordinal numerals in Latin are prīmus / prior , secundus / alter (the first form when more than two objects are counted,

333-711: A 70 km diameter impact structure buried beneath the Kalahari desert in northern South Africa. The impact 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

444-758: A composite model, in which the Continental and Insular varieties are seen as part of a dialect continuum , with genealogical splits and areal innovations intersecting. Though Gaulish personal names written by Gauls in Greek script are attested from the region surrounding Massalia by the 3rd century BC, the first true inscriptions in Gaulish appeared in the 2nd century BC. At least 13 references to Gaulish speech and Gaulish writing can be found in Greek and Latin writers of antiquity. The word "Gaulish" ( gallicum ) as

555-499: 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

666-572: A group of women (often thought to be a rival group of witches), but the exact meaning of the text remains unclear. The Coligny calendar was found in 1897 in Coligny , France, with a statue identified as Mars . The calendar contains Gaulish words but Roman numerals, permitting translations such as lat evidently meaning days, and mid month. Months of 30 days were marked matus , "lucky", months of 29 days anmatus , "unlucky", based on comparison with Middle Welsh mad and anfad , but

777-647: 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

888-569: A language term is first explicitly used in the Appendix Vergiliana in a poem referring to Gaulish letters of the alphabet. Julius Caesar says in his Commentarii de Bello Gallico of 58 BC that the Celts/Gauls and their language are separated from the neighboring Aquitani and Belgae by the rivers Garonne and Seine / Marne , respectively. Caesar relates that census accounts written in Greek script were found among

999-655: A late survival in Armorica and language contact of some form with the ascendant Breton language ; however, it has been noted that there is little uncontroversial evidence supporting a relatively late survival specifically in Brittany whereas there is uncontroversial evidence that supports the relatively late survival of Gaulish in the Swiss Alps and in regions in Central Gaul. Drawing from these data, which include

1110-572: A legal or magical-religious nature, the three longest being the Larzac tablet , the Chamalières tablet and the Lezoux dish . The most famous Gaulish record is the Coligny calendar , a fragmented bronze tablet dating from the 2nd century AD and providing the names of Celtic months over a five-year span; it is a lunisolar calendar trying to synchronize the solar year and the lunar month by inserting

1221-453: 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

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1332-431: A special purpose, such as an imperative, emphasis, contrast, and so on. Also, the verb may contain or be next to an enclitic pronoun or with "and", "but", etc. According to J. F. Eska, Gaulish was certainly not a verb-second language, as the following shows: Whenever there is a pronoun object element, it is next to the verb, as per Vendryes' Restriction . The general Celtic grammar shows Wackernagel's rule , so putting

1443-621: A stop + s became ss , and a nasal + velar became ŋ + velar. The lenis plosives seem to have been voiceless, unlike in Latin, which distinguished lenis occlusives with a voiced realization from fortis occlusives with a voiceless realization, which caused confusions like Glanum for Clanum , vergobretos for vercobreto , Britannia for Pritannia . The alphabet of Lugano used in Cisalpine Gaul for Lepontic: The alphabet of Lugano does not distinguish voicing in stops: P represents /b/ or /p/ , T

1554-676: A thirteenth month every two and a half years. There is also a longish (11 lines) inscribed tile from Châteaubleau that has been interpreted as a curse or alternatively as a sort of wedding proposal. Many inscriptions are only a few words (often names) in rote phrases, and many are fragmentary. It is clear from the subject matter of the records that the language was in use at all levels of society. Other sources contribute to knowledge of Gaulish: Greek and Latin authors mention Gaulish words, personal and tribal names, and toponyms . A short Gaulish-Latin vocabulary (about 20 entries headed De nominib[us] Gallicis ) called " Endlicher's Glossary "

1665-492: 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

1776-743: Is a stub . You can help Misplaced Pages by expanding it . Jurassic 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 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

1887-494: 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 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,

1998-419: Is evidently an account or a calculation and contains quite different ordinals: Other Gaulish numerals attested in Latin inscriptions include * petrudecametos "fourteenth" (rendered as petrudecameto , with Latinized dative-ablative singular ending) and * triconts "thirty" (rendered as tricontis , with a Latinized ablative plural ending; compare Irish tríocha ). A Latinized phrase for

2109-565: 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

2220-565: Is for /d/ or /t/ , K for /g/ or /k/ . Z is probably for /t / . U /u/ and V /w/ are distinguished in only one early inscription. Θ is probably for /t/ and X for /g/ (Lejeune 1971, Solinas 1985). The Eastern Greek alphabet used in southern Gallia Narbonensis . Latin alphabet (monumental and cursive) in use in Roman Gaul : G and K are sometimes used interchangeably (especially after R). Ꟈ / ꟈ , ds and s may represent /ts/ and/or /dz/ . X, x

2331-412: Is for [x] or /ks/ . Q is only used rarely ( Sequanni, Equos ) and may represent an archaism (a retained *k ), borrowings from Latin, or, as in Latin, an alternate spelling of -cu- (for original /kuu/ , /kou/ , or /kom-u/ ). Ꟈ is the letter tau gallicum , the Gaulish affricate. The letter ꟉꟉ / ꟊꟊ occurs in some inscriptions. Gaulish had some areal (and genetic, see Indo-European and

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2442-470: 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

2553-618: 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 a tour of the region in 1795, German naturalist Alexander von Humboldt recognized carbonate deposits within

2664-475: 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

2775-577: 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 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

2886-572: Is preserved in a 9th-century manuscript (Öst. Nationalbibliothek, MS 89 fol. 189v). French now has about 150 to 180 known words of Gaulish origin , most of which concern pastoral or daily activity. If dialectal and derived words are included, the total is about 400 words. This is the highest number among the Romance languages . Gaulish inscriptions are edited in the Recueil des inscriptions gauloises (RIG), in four volumes, comprising text (in

2997-707: Is the setting of the world's largest oil reserves, including the Ghawar Field , 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 ,

3108-622: 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 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

3219-603: The Balkans and Anatolia . Their precise linguistic relationships are uncertain due to fragmentary evidence. The Gaulish varieties of central and eastern Europe and of Anatolia (called Noric and Galatian , respectively) are barely attested, but from what little is known of them it appears that they were quite similar to those of Gaul and can be considered dialects of a single language. Among those regions where substantial inscriptional evidence exists, three varieties are usually distinguished. The relationship between Gaulish and

3330-701: The Celtiberian spoken in the Iberian Peninsula , Gaulish is a member of the geographic group of Continental Celtic languages . The precise linguistic relationships among them, as well as between them and the modern Insular Celtic languages , are uncertain and a matter of ongoing debate because of their sparse attestation . Gaulish is found in some 800 (often fragmentary) inscriptions including calendars, pottery accounts, funeral monuments, short dedications to gods, coin inscriptions, statements of ownership, and other texts, possibly curse tablets . Gaulish

3441-614: The English language , through the influence of Old French . It is estimated that during the Bronze Age , Proto-Celtic started splitting into distinct languages, including Celtiberian and Gaulish. Due to the expansion of Celtic tribes in the 4th and 3rd centuries BC, closely related forms of Celtic came to be spoken in a vast arc extending from Britain and France through the Alpine region and Pannonia in central Europe, and into parts of

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3552-641: The Helvetii . He also notes that as of 53 BC the Gaulish druids used the Greek alphabet for private and public transactions, with the important exception of druidic doctrines, which could only be memorised and were not allowed to be written down. According to the Recueil des inscriptions gauloises nearly three quarters of Gaulish inscriptions (disregarding coins) are in the Greek alphabet. Later inscriptions dating to Roman Gaul are mostly in Latin alphabet and have been found principally in central France. Latin

3663-513: 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 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

3774-625: The La Tène period, was found in Port , near Biel/Bienne , with its blade inscribed with ΚΟΡΙϹΙΟϹ ( Korisios ), probably the name of the smith. The diphthongs all transformed over the historical period. Ai and oi changed into long ī and eu merged with ou , both becoming long ō . Ei became long ē . In general, long diphthongs became short diphthongs and then long vowels. Long vowels shortened before nasals in coda . Other transformations include unstressed i became e , ln became ll ,

3885-651: The Latin , Greek , and Etruscan alphabets ) written on public monuments, private instrumentum , two calendars, and coins. The longest known Gaulish text is the Larzac tablet , found in 1983 in l'Hospitalet-du-Larzac , France. It is inscribed in Roman cursive on both sides of two small sheets of lead. Probably a curse tablet ( defixio ), it clearly mentions relationships between female names, for example aia duxtir adiegias [...] adiega matir aiias (Aia, daughter of Adiega... Adiega, mother of Aia) and seems to contain incantations regarding one Severa Tertionicna and

3996-728: 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 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

4107-636: 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

4218-748: 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 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

4329-593: 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 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

4440-560: 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 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

4551-655: 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

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4662-575: The Celtic god of metalwork . Furthermore, there is a statue of a seated goddess with a bear , Artio , found in Muri bei Bern , with a Latin inscription DEAE ARTIONI LIVINIA SABILLINA , suggesting a Gaulish Artiū "Bear (goddess)". Some coins with Gaulish inscriptions in the Greek alphabet have also been found in Switzerland, e.g. RIG IV Nos. 92 ( Lingones ) and 267 ( Leuci ). A sword, dating to

4773-464: 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 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

4884-632: The Gaulish language. Spindle whorls were apparently given to girls by their suitors and bear such inscriptions as: A gold ring found in Thiaucourt seems to express the wearers undying loyalty to her lover: Inscriptions found in Switzerland are rare. The most notable inscription found in Helvetic parts is the Bern zinc tablet , inscribed ΔΟΒΝΟΡΗΔΟ ΓΟΒΑΝΟ ΒΡΕΝΟΔΩΡ ΝΑΝΤΑΡΩΡ ( Dobnorēdo gobano brenodōr nantarōr ) and apparently dedicated to Gobannus ,

4995-484: The Gaulish t-preterit, formed by merging an old third-person singular imperfect ending -t - to a third-person singular perfect ending -u or -e and subsequent affixation to all forms of the t-preterit tense. Similarly, the s-preterit is formed from the extension of -ss (originally from the third person singular) and the affixation of -it to the third-person singular (to distinguish it as such). Third-person plurals are also marked by addition of -s in

5106-467: 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 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

5217-792: 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 a book entitled Description of the Terrains that Constitute the Crust of the Earth or Essay on the Structure of

5328-413: 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 was changed as the appearance was seen as too localised an event for an international boundary. The Sinemurian Stage

5439-416: 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. Gaulish Gaulish is an extinct Celtic language spoken in parts of Continental Europe before and during the period of the Roman Empire . In the narrow sense, Gaulish

5550-457: 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 the Jurassic, evolving from a branch of theropod dinosaurs. Other major events include

5661-487: The Jurassic, both the North and South Pole were covered by oceans. Beginning in 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

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5772-437: The Jurassic, the North Atlantic Ocean remained relatively narrow, while the South Atlantic did not open until 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

5883-510: 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 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

5994-535: 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 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

6105-407: 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

6216-416: 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 )

6327-445: 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

6438-405: 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

6549-462: 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

6660-502: 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

6771-414: 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

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6882-529: 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

6993-489: 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 the transition from a terrestrial to an aquatic life. The oceans were inhabited by marine reptiles such as ichthyosaurs and plesiosaurs , while pterosaurs were

7104-428: 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

7215-401: The authors meant by those terms), though at first these only concerned the upper classes. For Galatia (Anatolia), there is no source explicitly indicating a 5th-century language replacement: Despite considerable Romanization of the local material culture, the Gaulish language is held to have survived and coexisted with spoken Latin during the centuries of Roman rule of Gaul. The exact time of

7326-407: 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 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

7437-556: The controversial Italo-Celtic hypothesis) similarity to Latin grammar, and the French historian Ferdinand Lot argued that this helped the rapid adoption of Vulgar Latin in Roman Gaul. Gaulish had seven cases : the nominative , vocative , accusative , genitive , dative , instrumental and the locative case . Greater epigraphical evidence attests common cases (nominative and accusative) and common stems (-o- and -a- stems) than for cases less frequently used in inscriptions or rarer -i-, -n- and -r- stems. The following table summarises

7548-450: The difference between -n and -m relies on the length of the preceding vowel, with longer vowels taking -m over -n (in the case of -anom this is a result of its innovation from -a-om ). Gaulish verbs have present, future, perfect, and imperfect tenses; indicative, subjunctive, optative and imperative moods; and active and passive voices. Verbs show a number of innovations as well. The Indo-European s-aorist became

7659-447: 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 the period, as well as other groups like the extinct Bennettitales . The chronostratigraphic term "Jurassic"

7770-616: 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

7881-413: 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

7992-465: 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 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

8103-468: 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

8214-619: 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

8325-411: The final language death of Gaulish is unknown, but it is estimated to have been about the sixth century AD. The language shift was uneven in its progress and shaped by sociological factors. Although there was a presence of retired veterans in colonies, these did not significantly alter the linguistic composition of Gaul's population, of which 90% was autochthonous; instead, the key Latinizing class

8436-686: The first appearance of Cardioceras redcliffense as the lower boundary. The village of Kimmeridge on the coast of Dorset , England, 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

8547-465: The first appearance of the ammonite Strambergella jacobi , formerly placed in 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,

8658-402: 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

8769-511: The inherited genitive singular -as is attested but was subsequently replaced by -ias as in Insular Celtic. The expected genitive plural -a-om appears innovated as -anom (vs. Celtiberian -aum ). There also appears to be a dialectal equivalence between -n and -m endings in accusative singular endings particularly, with Transalpine Gaulish favouring -n , and Cisalpine favouring -m . In genitive plurals

8880-608: 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

8991-472: 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

9102-465: The latest Jurassic to earliest Cretaceous, have been suggested to represent 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

9213-725: The mapping of substrate vocabulary as evidence, Kerkhof argues that we may "tentatively" posit a survival of Gaulish speaking communities "at least into the sixth century" in pockets of mountainous regions of the Central Massif , the Jura , and the Swiss Alps . According to Recueil des inscriptions gauloises more than 760 Gaulish inscriptions have been found throughout France, with the notable exception of Aquitaine , and in northern Italy. Inscriptions include short dedications, funerary monuments, proprietary statements, and expressions of human sentiments, but also some longer documents of

9324-499: The meaning could here also be merely descriptive, "complete" and "incomplete". The pottery at La Graufesenque is the most important source for Gaulish numerals. Potters shared furnaces and kept tallies inscribed in Latin cursive on ceramic plates, referring to kiln loads numbered 1 to 10: The lead inscription from Rezé (dated to the 2nd century, at the mouth of the Loire , 450 kilometres (280 mi) northwest of La Graufesenque )

9435-428: 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

9546-422: 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

9657-460: 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

9768-497: The other Celtic languages is also debated. Most scholars today agree that Celtiberian was the first to branch off from other Celtic. Gaulish, situated in the centre of the Celtic language area, shares with the neighboring Brittonic languages of Britain, as well as the neighboring Italic Osco-Umbrian languages , the change of the Indo-European labialized voiceless velar stop /kʷ/ > /p/ , while both Celtiberian in

9879-549: The plural instrumental had begun to encroach on the dative plural (dative atrebo and matrebo vs. instrumental gobedbi and suiorebe ), and in the modern Insular Languages , the instrumental form is known to have completely replaced the dative. For o-stems, Gaulish also innovated the pronominal ending for the nominative plural -oi and genitive singular -ī in place of expected -ōs and -os still present in Celtiberian ( -oś, -o ). In a-stems,

9990-611: 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

10101-654: The prestige language of their urban literate elite. Bonnaud maintains that Latinization occurred earlier in Provence and in major urban centers, while Gaulish persisted longest, possibly as late as the tenth century with evidence for continued use according to Bonnaud continuing into the ninth century, in Langres and the surrounding regions, the regions between Clermont , Argenton and Bordeaux , and in Armorica . Fleuriot, Falc'hun, and Gvozdanovic likewise maintained

10212-424: The preterit. Most Gaulish sentences seem to consist of a subject–verb–object word order: Some, however, have patterns such as verb–subject–object (as in living Insular Celtic languages) or with the verb last. The latter can be seen as a survival from an earlier stage in the language, very much like the more archaic Celtiberian language . Sentences with the verb first can be interpreted, however, as indicating

10323-650: The reconstructed endings for the words * toṷtā "tribe, people", * mapos "boy, son", * ṷātis "seer", * gutus "voice", and * brātīr "brother". In some cases, a historical evolution is attested; for example, the dative singular of a-stems is -āi in the oldest inscriptions, becoming first * -ăi and finally -ī as in Irish a -stem nouns with attenuated ( slender ) consonants: nom. lámh "hand, arm" (cf. Gaul. lāmā ) and dat. láimh (< * lāmi ; cf. Gaul. lāmāi > * lāmăi > lāmī ). Further,

10434-648: 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 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

10545-406: The second form only when two, alius , like alter means "the other", the former used when more than two and the latter when only two), tertius, quārtus, quīntus, sextus, septimus, octāvus, nōnus , and decimus . An inscription in stone from Alise-Sainte-Reine (first century AD) reads: A number of short inscriptions are found on spindle whorls and are among the most recent finds in

10656-526: The south and Goidelic in Ireland retain /kʷ/ . Taking this as the primary genealogical isogloss , some scholars divide the Celtic languages into a " q-Celtic " group and a " p-Celtic " group, in which the p-Celtic languages Gaulish and Brittonic form a common "Gallo-Brittonic" branch. Other scholars place more emphasis on shared innovations between Brittonic and Goidelic and group these together as an Insular Celtic branch. Sims-Williams (2007) discusses

10767-573: 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 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

10878-538: The verb at the beginning of the clause or sentence. As in Old Irish and traditional literary Welsh, the verb can be preceded by a particle with no real meaning by itself but originally used to make the utterance easier. According to Eska's model, Vendryes' Restriction is believed to have played a large role in the development of Insular Celtic verb-subject-object word order. Other authorities such as John T. Koch , dispute that interpretation. Considering that Gaulish

10989-407: The world's major landmasses were coalesced into the supercontinent Pangaea , which during 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

11100-585: 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

11211-474: 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 a cliff face north of the hamlet of East Quantoxhead , 6 kilometres east of Watchet , Somerset , England , within the Blue Lias , and

11322-518: Was first written in Greek script in southern France and in a variety of Old Italic script in northern Italy. After the Roman conquest of those regions, writing shifted to Latin script . During his conquest of Gaul, Caesar reported that the Helvetii were in possession of documents in the Greek script, and all Gaulish coins used the Greek script until about 50 BC. Gaulish in Western Europe

11433-569: 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

11544-639: 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 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

11655-490: 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

11766-506: Was quickly adopted by the Gaulish aristocracy after Roman conquest to maintain their elite power and influence, trilingualism in southern Gaul being noted as early as the 1st century BC. Early references to Gaulish in Gaul tend to be made in the context of problems with Greek or Latin fluency until around AD 400, whereas after c.  450 , Gaulish begins to be mentioned in contexts where Latin has replaced "Gaulish" or "Celtic" (whatever

11877-687: 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 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

11988-430: 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 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 ,

12099-499: Was supplanted by Vulgar Latin . It is thought to have been a living language well into the 6th century. The legacy of Gaulish may be observed in the modern French language and the Gallo-Romance languages , in which 150–400 words , mainly referring to pastoral and daily activities, are known to be derived from the extinct Continental Celtic language. Following the 1066 Norman Conquest , some of these words have also entered

12210-516: Was the coopted local elite, who sent their children to Roman schools and administered lands for Rome. In the fifth century, at the time of the Western Roman collapse, the vast majority (non-elite and predominantly rural) of the population remained Gaulish speakers, and acquired Latin as their native speech only after the demise of the Empire, as both they and the new Frankish ruling elite adopted

12321-708: Was the language of the Celts of Gaul (now France, Luxembourg, Belgium, most of Switzerland, Northern Italy, as well as the parts of the Netherlands and Germany on the west bank of the Rhine ). In a wider sense, it also comprises varieties of Celtic that were spoken across much of central Europe (" Noric "), parts of the Balkans , and Anatolia (" Galatian "), which are thought to have been closely related. The more divergent Lepontic of Northern Italy has also sometimes been subsumed under Gaulish. Together with Lepontic and

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