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110-547: The massif of Tymphe includes in its southern part the Vikos Gorge , while they both form part of the Vikos–Aoös National Park which accepts over 100,000 visitors per year. The former municipality of Tymfi owed its name to the mountain. The exact meaning of the name is not known but has been in use since ancient times. The name "Tymphe" or "Stymphe" is mentioned by ancient geographer Strabo , Book 7, Ch. 7, and

220-600: A stratum from the Campanian era, while below 700 m (2,300 ft) they consist of Jurassic and Cretaceous limestone. In the deepest layers, grey Jurassic dolomite is dominant. Sedimentary and lithological investigation in the Voidomatis basin revealed that the innermost alluvial deposits consist of limestone-derived material, carried by the Voidomatis river from higher elevations by glacial action about 30,000 years ago. The subsequent (middle) deposits are

330-711: 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

440-417: A direction from east to west and its width is approximately 15 km from north to south. The southern and southeastern slopes of the mountain are comparatively smooth. The north side, however, forms cliffs reaching 400 m (1,312 ft), whereas the western side is equally steep since the mountain is fragmented by Vikos Gorge . The massif includes several peaks that stand above 2400m. From west to east

550-499: 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

660-476: A few meters at its narrowest part, is listed by the Guinness Book of Records as the deepest canyon in the world in proportion to its width, though some gorge lobbyists contest that claim. The main part of the gorge stretches from the village of Vikos to Monodendri , and attains a depth of about 1,350 m (4,429 ft). The landscape of the 32 km long gorge, 12 km of which belongs to

770-647: 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

880-453: 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

990-492: 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

1100-484: Is a gorge in the Pindus Mountains of north-western Greece . It lies on the southern slopes of Mount Tymphe with a length of about 32 km, depth ranging from 120 to 1350 m, and a width ranging from 2500 m to only a few meters at its narrowest part. Vikos is listed as the world's "deepest relative to its width" gorge by the Guinness Book of Records among others. There are a number of views regarding

1210-660: Is also the reason why the water is scarce. Only when an impenetrable stratum is met, does water appear on the surface. Many herbs of the Vikos Gorge and adjacent areas within the Vikos-Aoos National park were regarded to have medicinal properties and were once harvested by local healers, colloquially referred to as " Vikos doctors " ( Greek : Βικογιατροί , " Vikoiatri "). These herbal healers used special recipes that were often copies of ancient Greek recipes of Hippocrates or Dioscorides and became famous beyond

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1320-492: Is associated with the ancient land of Tymphaea and the Tymphaeans, one of the tribes of Ancient Epirus . Despite its ancient use, the name does not appear in any descriptions of the area by Greek or foreign geographers of the 19th century. In du Bocage's map of the region, made in 1820, the mountain is referred to as "Paleo-Vouni" (Greek for Old-Mountain) and Pouqueville mentions the name "Lazaris" in 1826. The etymology of

1430-494: 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,

1540-474: Is exhibited in the local natural history museum in the village of Koukouli . One of the special local attractions is the existence of the chamois ( Rupicapra rupicapra ), a rare species that lives at higher altitudes far from human activity, especially at the rocky cliffs, for example in Megas Lakos , a secondary ravine of the Vikos Gorge. There is a natural viewing platform over the deepest part of

1650-565: 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

1760-470: 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

1870-475: 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

1980-577: 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

2090-619: Is the Greek word for sorrel ; the name for the mountain's third highest peak Goúra ( Γκούρα , [gura] ) is from a common modern Greek word derived from the Latin gula also related to Aromanian gură: a mountain spring; Tsoúka Róssa ( Τσούκα Ρόσσα , [ˈt͡suka ˈrosa] ) means "red peak" in Aromanian . The mountain is surrounded by various massifs that also form part of the northern Pindus mountain range. Northeast of Tymphe lies

2200-454: Is the one beginning at the village of Mikro Papingo , located at the western side of the mountain at an altitude of 980 m (3,215 ft). The trail that leads to the Astraka mountain hut , is approximately 6 km long. It is part of the Greek national trail O3 and is generally well marked with signs (red diamond on white) and red dots and arrows on rocks and tree trunks. From the hut,

2310-707: 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 ,

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2420-622: 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

2530-509: The Cambridge University Caving Club , and has since then been surveyed by a large number of expeditions. The nearby Chasm of Epos , with a depth of 451 m (1,480 ft), drains the water coming from the surrounding plateaus. There is no meteorological station at the mountain itself and the closest one is located at the village of Papingo . The overall climate of the Vikos–Aoös National Park which includes

2640-585: 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 the Jura Mountains as geologically distinct from

2750-573: The Hellenic Ornithological Society mount Tymphe along with the neighbouring mountain Smolikas are important regions for breeding birds of prey, alpine and forest dwelling bird species. The Egyptian vulture , short-toed snake eagle , rufous-tailed rock-thrush breed in the region, whereas species such as the golden eagle , red-billed chough , rock partridge , alpine chough , wallcreeper , white-winged snowfinch and

2860-513: 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

2970-481: The Last Glacial Maximum , between 22,000 and 20,000 ago. During the large Middle Pleistocene glaciations, surface runoff from glacial meltwaters would have fed directly into the river channel network because much of the upland limestone terrain was covered by ice, and many conduits in the karst would have been choked with sediment or permanently frozen. As a result, the glacier snouts came close to

3080-728: 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

3190-800: 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 the Known Lands of the Earth. In this book, Brongniart used

3300-523: The alpine accentor are sedentary. Alpine reptilian and amphibian species are also present. Vipera ursinii lives in the mountain's subalpine meadows and is considered a threatened taxon. The amphibian alpine newts ( Triturus alpestris ), living in the alpine lakes of the mountain, mostly in and around Drakolimni, are associated with local folktales of dragons and dragon battles. Yellow-bellied toads ( Bombina variegata ) are also common in that same area. The simplest and most commonly used route of ascent

3410-636: 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

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3520-465: The Astraka-Gamila plateau, and in the upland terrain above the villages of Skamneli and Tsepelovo , where lateral and terminal moraines form major landscape features. Additional forms of glacial deposits, which extend down to 850 m (2,789 ft) above sea level, include rock glaciers and limestone pavements . A number of vertical caves and precipices are found in the area around

3630-748: 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

3740-593: 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

3850-560: 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

3960-655: 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

4070-464: 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

4180-467: 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

4290-483: 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

4400-797: 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

4510-428: 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 the Jurassic was warmer than the present, and there were no ice caps . Forests grew close to

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4620-742: 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

4730-572: 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

4840-462: The Karteros Pass. From the village of Vradeto to the south of the mountain the trail to the peak is approximately 14.9 km. Trails that lead to the mountain can also be followed from Konitsa and Tsepelovo . Those routes are poorly and scarcely marked, mostly by dots of red paint on rocks, and are in some cases unclear and covered by vegetation. The first recorded climb of the mountain

4950-526: 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

5060-416: 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 )

5170-501: 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

5280-653: 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

5390-719: 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

5500-502: 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

5610-414: 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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5720-529: 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

5830-419: The Vikos Stream and its continuation, the Voidomatis River, a tributary of the Aoös (Vjosa). As the Vikos Gorge is a deep cross section of the mountain, its slopes expose a series of rock formations of various ages. The upper layers, at a depth of 0–200 m (660 ft), consist of relatively young Eocene limestone , at a depth of 200 m (660 ft)–700 m (2,300 ft) they consist of

5940-455: The Vikos gorge stream is only seasonal, and is permanent only at the lowest part of the gorge. Vikos is also a site of major scientific interest, because it is in almost virgin condition, it is a haven for endangered species and contains many and varied ecosystems. The Vikos Gorge, with a length of 32 km (20 mi), walls that range from 120–1,350 m (390–4,400 ft) deep, and a width ranging from 2,500 m (8,202 ft) to just

6050-484: The area during the winter months. Compared to Mediterranean bioclimatic divisions, the area belongs to the humid zone with cold winters. Conditions in the mountain might be significantly different from those of lower regions in the same area. Winters are particularly harsh and the mountain is covered in snow from autumn until late May. The mountain is located at the Zagori region and the nearest settlements are mainly villages. Iliochori , Vrysochori and Laista lie to

6160-428: 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

6270-407: 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

6380-588: The borders of Greece. The plants used in these recipes include the lemon balm Melissa officinalis , Tilia tomentosa , the spearmint Mentha spicata , the gas-plant Dictamnus albus , St John’s Wort Hypericum perforatum , absinth Artemisia absinthium , the very popular Sideritis raeseri , known colloquially in Greece as “mountain tea”, and the elder bush Sambucus nigra . A chemical screening of these native plant species has shown that many are characterized by biologically active ingredients. A collection of 2,500 dried species of local plants and herbs

6490-560: The east, Skamneli and Tsepelovo to the south, and Papingo and Vikos to the west and southwest respectively. Facilities in the aforementioned villages vary, but most of them offer restaurants and accommodation. The nearest town is Konitsa to the northwest. The closest city with an airport is Ioannina , approximately 60 km south of Papingo . The coach service from Ioannina offers seven daily coaches to Konitsa and two weekly services to Papingo (on Fridays) as of 2011. The GR-20 ( Kozani - Siatista - Ioannina ) passes close to

6600-460: 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 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

6710-616: 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

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6820-413: 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

6930-402: 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 the eruption of the Karoo-Ferrar large igneous provinces . The end of

7040-416: The etymology of the name: The gorge is found in the core zone of the Vikos–Aoös National Park , in the Zagori region. Its main part begins between the villages of Vitsa and Koukouli and ends near the village of Vikos (or Vitsiko). The gorge collects the waters of small, mostly seasonal streams and leads them into the Voidomatis River which forms in the end part of the main gorge. The major part of

7150-417: 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

7260-449: 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

7370-472: 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 the dominant flying vertebrates . Modern sharks and rays first appeared and diversified during

7480-403: 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

7590-409: 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,

7700-402: 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

7810-410: The gorge at Oxia, a location 8 km by a newly constructed road from the village of Monodendri . Another viewpoint over the gorge is at Beloi, on the eastern side of the gorge, accessible from the village of Vradeto . A hiking trail descends into the gorge from Monodendri. The trail then leads north through the gorge to the springs of the Voidomatis river, from where paths lead out of the gorge to

7920-409: The highest mountain of Pindus, Smolikas . The mountain of Trapezitsa lies to the north, Lyngos to the east and Mitsikeli to the south. The Aoos river flows to the north of Mt Tymphe while its tributary Voidomatis has its sources in the mountain. Vikos Gorge is formed by the Voidomatis on the southwestern side of the mountain. The length of the mountain is approximately 20 to 25 km with

8030-399: The hikers might either head northeast to the drakolimni alpine lake for another 2.8 km or southeast to reach Gamila peak, which is the highest peak of the mountain at 2,497 m (8,192 ft) for another 6 km. In both cases there are no signposts and the hikers should solely rely on red dots marked on rocks or scarce small signs attached to wooden poles. The hike from Papingo to

8140-491: The historical period the local population in the nearby villages was sparse. The land adjacent of the Vikos gorge, as well as the gorge itself, was mainly used for pastoralism and supplying firewood. [REDACTED] Media related to Vikos Gorge at Wikimedia Commons Jurassic The Jurassic ( / dʒ ʊ ˈ r æ s ɪ k / juurr- ASS -ik ) is a geologic period and stratigraphic system that spanned from

8250-405: The hut lasts between 2–3 hours and the round-trip from the hut to drakolimni another 2 hours. The mountain is also accessible from other surrounding villages but the trails are longer and the terrain rougher and steeper. Therefore, they are suggested for more experienced hikers. From the village of Vrysochori at the eastern side of the mountain, a trail of 12.8 km leads to Gamila peak through

8360-562: The largest recorded population of the Balkan chamois goat ( Rupicapra rupicapra balcanica ) in Greece, with a population between 120-130 individuals out of an estimated national population between 477–750. Although chamois is registered as least concern in IUCN 's red list, the subspecies balcanica numbers some thousands of individuals and its population is believed to be declining. According to

8470-605: 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

8580-472: 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

8690-403: 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

8800-436: The latter 19 routes. Potential climbers should take into account that several of the routes were first ascended several years ago and thus pitons might be compromised if present at all. Furthermore, some locations in the mountain are isolated and rescue services might find it particularly challenging to access the area in case of emergency. Vikos Gorge The Vikos Gorge or Vikos Canyon ( Greek : Φαράγγι του Βίκου )

8910-428: 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

9020-456: The modern valley bottoms. In contrast, during interglacial and interstadial periods, more effective coupling occurred between the surface drainage network and the internal karst drainage system. Since limestone dissolves as the water percolates through its pores, an extended underground drainage system has developed, with caves and channels that enlarge with time when their roofs collapse, producing rocky exposures and perpendicular slopes, which

9130-415: The most prominent are the following: Astraka, 2,436 m (7,992 ft), Ploskos, 2,377 m (7,799 ft), Gamila, 2,497 m (8,192 ft), Gamila ΙΙ, 2,480 m (8,136 ft), Karteros, 2,478 m (8,130 ft), Megala Litharia, 2,467 m (8,094 ft), Tsouka Rossa, 2,379 m (7,805 ft), and Goura, 2,466 m (8,091 ft). The peaks form a plateau. Astraka, dominates

9240-519: The mountain is Mediterranean , transitioning to continental . The Mediterranean character is characterized by the annual distribution of precipitation , high in the winter months and experiencing a drought period of two to three months in summer. The continental climatic element is attributed to the high amplitude of annual temperature variation, to such a degree that the difference between mean maximum and mean minimum annual temperature, exceeds 40 °C (104 °F). Extremely low temperatures occur in

9350-456: The mountain's peaks are mainly of Greek origin. The highest peak Gamíla ( Γκαμήλα , [gaˈmila] ) means camel in Greek; Karterós ( Καρτερός , [karteros] ) means mighty or powerful; Megála Lithária ( Μεγάλα Λιθάρια , [meˈɣala liˈθarja] ) means big rocks in modern Greek; Astráka ( Αστράκα , [astraka] ) is a Greek word for a roof's eaves derived from Slavic стреха; Lápato ( Λάπατο , [lapato] )

9460-464: The northern scarp. The lower slopes are dominated by younger flysch rocks, which consist of thin beds of graded sandstones intercalated with softer, fissile siltstones . Extended glacial conditions prevailed on the uplands of Mount Tymphe during the Late Quaternary period, ca. 28,000 years ago. The glacial landscape is well-developed, especially on the southern slopes of Mount Tymphe, across

9570-422: 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

9680-460: 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

9790-426: The park's core zone, presents a diverse relief and is characterized by abrupt altitudinal changes. Steep slopes and precipitous rocky cliffs dominate in the middle and higher zones respectively. Numerous gullies dissect both sides of the gorge and the movement of water detaching various rocky materials creates extended screes . The gorge, with a northwest-southeast direction, has been carved over millions of years by

9900-497: 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" is linked to the Jura Mountains , a forested mountain range that mainly follows

10010-592: 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

10120-454: The plateau on its northern face. A mountain hut named D. Georgoulis, which operates during the summer months, is located at the mountain pass between the peaks of Astraka and Lapatos at 1930m of altitude. There are several lakes on the mountain, some of which dry out during the summer. The most famous of those that have water year-round is Drakolimni (lit. "Dragon lake" in Greek), formed after

10230-611: 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

10340-476: 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 the appearance of the earliest crabs and modern frogs , salamanders and lizards . Mammaliaformes , one of

10450-524: The product of de-glaciation and the extended run-off from the uplands about 20,000 years ago, while the outer unit is attributed to human activities associated with pastoralism , which caused extended deforestation and soil erosion. The Voidomatis basin contains evidence for three major phases of glaciation , with the two largest and earliest taking place during the Middle Pleistocene . The final phase of glacial activity probably occurred during

10560-648: 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

10670-421: The retreat of the glaciers . It is located at a height of 2,000 m (6,562 ft) northwest of Ploskos. Its maximum depth is 4.95 m (16 ft), while its surface covers 1 ha (2 acres). Mount Tymphe represents a series of uplifted fault blocks and faulted escarpments and is largely composed of Palaeocene - Eocene limestone, with some exposures of Campanian - Jurassic dolomite and limestone on

10780-573: 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

10890-622: The village of Papingo on the north side of the gorge, or to the village of Vikos on the south side of the gorge. It is also possible to hike south through the gorge from Monodendri to the 18th century stone bridges near Kipi . Important epipaleolithic artifacts have been unearthed from the Kleithi rock shelter on the banks of the Voidomatis. During the 9th–4th centuries B.C., a small Molossian settlement existed between Monodendri and Vitsa , including stone houses and two cemeteries that have yielded important findings. However, for most of

11000-535: The village of Papingo , in the vicinity of the Gamila and Astraka peaks. Some of them have been given names inspired from mythology , such as the Hole of Odysseus and Chasm of Epos . They are being studied and explored by caving enthusiasts. The cave of "Provatina" (Lit. "Ewe's Cave"), with a depth of 408 m (1,339 ft), one of the deepest in the world, was first discovered in 1965 by British speleologists of

11110-434: The western, northwestern and north sides of the mountain. Most of the mountain, with the exception of its southernmost part around the peak of Astraka, forms part of the Vikos–Aoös National Park . The park is a designated protected area and visitors should be aware of the limitations to activities imposed by the law. The World Wide Fund for Nature (WWF) runs an information centre in the village of Papingo . Tymphe holds

11220-497: 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

11330-585: 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

11440-474: 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

11550-629: 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

11660-617: Was made on 7–8 June 1956 by Giorgos Michailidis and Giorgos Xanthopoulos who climbed the face of Gamila. Four years later, on 25–26 August 1960, Guido Magnone and Spyros Antypas climbed the northeastern face of Gamila. Currently there are 17 climbing fields on the mountain, covering most of the major peaks and other geological features of the mountain. From the aforementioned fields, the northeastern face of Gamila counts 8 climbing routes, and Gamila II 6. The fields of Astraka and Tsouka Rossa have several climbing routes each. The former counts 30 routes in both its northwestern and northeastern faces, and

11770-582: 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

11880-490: 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

11990-687: 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

12100-430: 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 ,

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