When these two continents joined together, Laurasia was nearly reformed, and by the beginning of the Triassic, the East China craton had rejoined the redeveloping Laurasia as it collided with Gondwana to form Pangaea. Laurasiatheria is the scientific name of a large group of placental mammals believed to have originated on the northern supercontinent of Laurasia. Homeland Security chief fires almost entire advisory council. To avoid confusion with the Mesozoic continent, this is referred to as Proto-Laurasia. 1 word related to Laurasia: northern hemisphere. 35 pieces", "Large Igneous Provinces and supercontinents: Toward completing the plate tectonic revolution", "Ecology and evolution of pine life histories", "Assembly, configuration, and break-up history of Rodinia: A synthesis", "Geochemical evidence of First Forestation in the southernmost euramerica from Upper Devonian (Famennian) Black shales", "The late Palaeozoic relations between Gondwana and Laurussia", "A Laurasian origin for a pantropical bird radiation is supported by genomic and fossil data (Aves: Coraciiformes)", "What's in a name? Rodinia • [5], "Laurussia" was defined by Swiss geologist Peter Ziegler in 1988 as the merger between Laurentia and Baltica along the northern Caledonian suture. Pangea, supercontinent that incorporated almost all of Earth’s landmasses in early geologic time. Laurasia (/lɔːˈreɪʒə, -ʃiə/), a portmanteau for Laurentia and Asia, was the more northern of two minor supercontinents (the other being Gondwana) that formed part of the Pangaea supercontinent from around 335to175 million years ago (Mya). A magmatic arc extended from Laurentia through southern Greenland to northern Baltica. It separated from Gondwana 215 to 175 Mya during the breakup of Pangaea, drifting farther north after the split and finally broke apart with the opening of the North Atlantic Ocean c. 56 Mya. Torsvik, T. H. 2003. [39], In the early Eocene a peak in global warming led to a pan-Arctic fauna with alligators and amphibians present north of the Arctic Circle. As a result, two groups of tribosphenic mammals evolved separately on the newly formed landmasses: the Boreosphenida (marsupials and placentals) in Laurasia and the Australosphenida (monotremes and extinct relatives) in Gondwana. [20][21], With the Caledonian orogeny completed Laurussia was delimited by:[22], During the Devonian (416-359 Mya) the combined landmass of Baltica and Avalonia rotated around Laurentia, which remained static near the Equator. Laurentia then began to move quickly (20 cm/year (7.9 in/year)) north towards the Equator where it got stuck over a cold spot in the Proto-pacific. Origin of laurasia New Latin Laur(entia) geologic precursor of North America (after the Saint Lawrence River ) (Eur)asia From American Heritage Dictionary of the English Language, 5th Edition The northern margins of the northern continent collided with Baltica and Siberia 310–250 Ma, and thus the formation of the East Asian continent marked Pangaea at its greatest extent. These differences resulted in different patterns of basin formation and transport of sediments. [8] Surviving sutures from this assembly are the Trans-Hudson orogen in Laurentia; Nagssugtoqidian orogen in Greenland; the Kola-Karelian (the northwest margin of the Svecokarelian/Svecofennian orogen) and the Volhyn—Central Russia and Pachelma orogenies (across western Russia) in Baltica; and the Akitkan Orogen in Siberia. Origin Although Laurasia is known as a Mesozoic phenomenon, ... Laurasia in 1 country. O que é a Laurásia. It also is believed that the same continents comprising Laurasia existed as a coherent landmass much earlier, forming after the breakup of the hypothesized supercontinent Rodinia about 1 billion years ago. East Antarctica was the highest ground within Pangaea and produced sediments that were transported across eastern Gondwana but never reached Laurasia. Laurasia definition: one of the two ancient supercontinents produced by the first split of the even larger... | Meaning, pronunciation, translations and examples 2009. Kenorland • Laurasia finally divided into the continents after which it is named: Laurentia (now North America) and Eurasia (excluding India and Arabia). The northern landmass, Laurasia, would drift north and gradually split into Europe, Asia and North America. 1,750 Mya extensive magmatism in Baltica, a 1,630–1,640 Mya-old continent composed of Siberia, Laurentia, and Baltica is suggested by. Laurasia Pacific Limited was incorporated on 14 August 2015 (Friday) and as of 27 June 2016 (Monday) is a Registered NZ Limited Company. By the Late Ordovician, when continents were pushed closer together closing the oceanic gaps, benthos (brachiopods and trilobites) could spread between continents while ostracods and fishes remained isolated. [2] The North China and South China cratons later collided with Siberia. Laurasia - New World Encyclopedi . Between 1980 and 2019, 1 girl was born with the Name Laurasia The country where the first name Laurasia is the most common is: Quebec Gender of first name Laurasia : Girl 100 . Between eastern North America and northwest Africa, a new ocean formed—the Atlantic Ocean, even though Greenland (attached to North America) and Europe were still joined together. All information about the first name Laurasia. In the dry climate a detritivorous fauna – including ringed worms, molluscs, and arthropods – evolved and diversified, alongside vertebrates – insectivores and piscivores such as amphibians and early amniotes (land-living reptiles). During the Neoproterozoic-Early Paleozoic break-up of Rodinia the opening of the Proto-Tethys Ocean split the Asian blocks – Tarim, Qaidam, Alex, North China, and South China – from the northern shores of Gondwana (north of Australia in modern coordinates) and the closure of the same ocean reassembled them along the same shores 500–460 Mya resulting in Gondwana at its largest extent. Proto-Laurasia may have split off about 750 million years ago. Logan and T. Sterry Hunt), named for the Laurentian Mountains (where it is found), which are named for the nearby St. Lawrence River (see Laurence ). Laurasia in 1 country. There is no evidence, though, for any large scale Carboniferous glaciation of the northern continents. in reference to granite strata in eastern Canada, 1854 (Sir W.E. Laurasia in Japanese-Laurasia in sign language-Laurasia T-Shirt. Its existence was proposed by Alexander Du Toit, a South African geologist, in Our Wandering Continents (1937). Laurasia (/lɔːˈreɪʒə, -ʃiə/),[1] a portmanteau for Laurentia and Asia,[2] was the more northern of two large landmasses (the other being Gondwana) that formed part of the Pangaea supercontinent from around 335 to 175 million years ago (Mya). In the early Palaeogene, landbridges still connected continents, allowing land animals to migrate between them. [31], Pangaea split in two as the Tethys Seaway opened between Gondwana and Laurasia in the Late Jurassic. By this time, the rifting of western Pangaea had already begun. Other blocks that now form part of southwestern Europe and North America from New England to Florida were still attached to the African-South American margin of Gondwana. Paleozoic supercontinent comprising North America and Eurasia, 1931, from German (1928), from Laurentia, geologists' name for the ancient core of North America (see Laurentian) + second element of Eurasia. This book was a reformulation of the continental This cold period saw the re-joining of Laurentia and Baltica with the formation of the Appalachian Mountains and the vast coal deposits, which are today a mainstay of the economy of such regions as West Virginia, the United Kingdom, and Germany. Word Origin for Laurasia C20: from New Latin Laur ( entia ) (referring to the ancient N American landmass, from Laurentian strata of the Canadian Shield) + ( Eur ) asia Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 By the Devonian, North China was located near the Arctic Circle and it remained the northernmost land in the world during the Carboniferous Ice Age between 300 and 280 million years ago. Origin of concept In 1904-1909 Austrian geologist Eduard Suess proposed that the continents in the Southern Hemisphere were once merged into a larger continent called Gondwana. It separated from Gondwana (beginning in … It is believed that Laurasia did not break up again before it recombined with the southern continents to form the late Precambrian supercontinent of Pannotia, which remained until the early Cam… North China became, as it drifted southwards from near-Arctic latitudes, the last continent to join with Pangaea. Art, Music, Literature, Sports and leisure, Equal areas of Gondwana and Laurasia (ancient supercontinents), https://www.newworldencyclopedia.org/p/index.php?title=Laurasia&oldid=943341, Creative Commons Attribution/Share-Alike License. Porcine crsp genes are located on chromosome 2.crsp-1 and crsp-2 genes consist of five exons. [38], From the Triassic to the Early Jurassic, before the break-up of Pangaea, archosaurs (crocodiles and dinosaurs including birds) had a global distribution. Laurasia (lôrāzh`ə): see continental driftcontinental drift, geological theory that the relative positions of the continents on the earth's surface have changed considerably through geologic time. [6], Several earlier supercontinents proposed and debated in the 1990s and later (e.g. How common is the name Laurasia. Pannotia • Origin Of The Gondwana Supercontinent Concept . Cenozoic of Laurasia Adán P érez -García Findings of terrestrial stem turtles are not uncommon at Mesozoic continental sites in Laurasia, especially during the Upper Cretaceous. Laurasia ,[1] a portmanteau for Laurentia and Asia,[2] was the more northern of two minor supercontinents that formed part of the Pangaea supercontinent from c. 425 million years ago to 200 Mya. The formation of different supercontinents, such as Laurasia, is explained today by the theory of plate tectonics, which recognizes the earth to have a thin, solid crust, made up of several plates, that floats or rides on an inner layer of melted rock. [32], Laurasia and Gondwana were equal in size but had distinct geological histories. The name Laurasia combines the names of Laurentia and Eurasia. Laurasia: Meaning of Laurasia . Fully assembled by the Early Permian Epoch (some 299 million to 273 million years ago), it began to break apart about 200 million years ago, eventually forming the … [34], When the eastern Palaeo-Tethys closed 250–230 Mya, a series of Asian blocks – Sibumasu, Indochina, South China, Qiantang, and Lhasa – formed a separate southern Asian continent. The oldest tribosphenic mammal from Laurasia (Purbeck Limestone Group, Berriasian, Cretaceous, UK) and its bearing on the ‘dual origin’ of Tribosphenida Le plus ancien mammifère tribosphénique de Laurasie (Purbeck Limestone Group, Berriasien, Royaume-Uni, et son apport à la «double origine »des Tribosphenida In contrast to the present Earth and its distribution of continental mass, Pangaea was centred on the Equator and surrounded by the superocean Panthalassa. Sibumasu and Qiantang and other Cimmerian continental fragments broke off in the Early Permian. Similar surnames: Laura, Laurie, Lauri, Lamia, Lupia, Faria, Laurito, Maria, Labrie J. Durch plattentektonische Vorgänge begann Pangaea ab der späten Trias (etwa 230 mya) auseinanderzubrechen. - Henry Benedict - Medlicott is credited with first naming this sequence the Gondwana series. It is considered that 250 million years from now, the present-day continents will once again reform into one gigantic supercontinent (Nield 2007). Australia and East Antarctica were located on Laurentia's western margin. Tetrapods evolved from fish in the Late Devonian, with the oldest known fossils from Greenland. [26] Heavy rainfall resulted in high groundwater tables, in turn resulting in peat formation and extensive coal deposits. Laurentia and Baltica formed a coherent continental mass with southern Greenland and Labrador adjacent to the Arctic margin of Baltica. Rhymes:English/eɪʃə: …- see also -eɪʒə) fascia geisha (one pronunciation - see also -iːʃə) Three syllables Acacia acacia Laurasia (one pronunciation - see also -eɪʒə) Four… [40], The Coraciiformes (an order of birds including kingfishers) evolved in Laurasia. [15], The Proto-Pacific opened and Rodinia began to breakup during the Neoproterozoic (c. 750–600 Mya) as Australia-Antarctica (East Gondwana) rifted from the western margin of Laurentia, while the rest of Rodinia (West Gondwana and Laurasia) rotated clockwise and drifted south. Laurentia, Avalonia, Baltica, and a series of smaller terranes, collided in the Caledonian orogeny c. 400 Ma to form Laurussia (also known as Euramerica, or the Old Red Sandstone Continent). [7], Laurentia and Baltica first formed a continental mass known as Proto-Laurasia as part of the supercontinent Columbia which was assembled 2,100—1,800 Mya to encompass virtually all known Archaean continental blocks. New basal synapsid supports Laurasian origin for therapsids. 1996. [33], During the assembly of Pangaea Laurasia grew as continental blocks broke off Gondwana's northern margin; pulled by old closing oceans in front of them and pulled by new opening oceans behind them. It separated from Gondwana 200 to 180 Mya during the breakup of Pangaea, drifting further north after... Laurasiatheria Biological Superorder, Organism Classification Around 200 million years ago, Pangaea started to break up. A Laurásia foi uma grande massa de continental localizada no hemisfério norte, que se formou há cerca de 200 milhões de anos, composta pelas actuais América do Norte e Eurásia (Europa e Ásia). H.B Medlicott, a geologist also used the term Gondwana to describe a sedimentary sequence. DOI: 10.4202/app.2008.0071. [14] The continents Laurasia-Gondwana 200 million years ago.Laurasia was a supercontinent that most recently existed as a part of the split of the Pangaean supercontinent in the late Mesozoic era.. Laurasia is the name given to the largely northern supercontinent that is thought to have formed most recently during the late Mesozoic era, as part of the split of the Pangaean supercontinent. Proto-Laurasia is believed to have existed as a coherent supercontinent after the breakup of the hypothesized supercontinent Rodinia around 1 billion years ago. [10] The breakup of Columbia began 1,600 Mya, including along the western margin of Laurentia and northern margin of Baltica (modern coordinates), and was completed c. 1,300—1,200 Mya, a period during which mafic dike swarms were emplaced, including MacKenzie and Sudbury in Laurentia. In 1915 German meteorologist Alfred Wegener proposed the existence of a supercontinent called Pangaea. In the late Carboniferous, Laurussia was centred on the Equator and covered by tropical rainforests, commonly referred to as the coal forest. Origin [ edit | edit source ] Although Laurasia is known as a Mesozoic phenomenon, today it is believed that the same continents that formed the later Laurasia also existed as a coherent supercontinent after the breakup of … [16], A mantle plume (the Central Iapetus Magmatic Province) forced Laurentia and Baltica to separate ca. The fossil record, however, suggests the intermittent presence of a Trans-Tethys land bridge, though the location and duration of such a land bridge remains enigmatic. [29] Origin of Oceans: When the Super Continent Pangaea broke into a) Laurasia (encompassing North America & Eurasia) and b) Gondwana (containing … On the last available year for each country, we count 0 birth. Pangaea existed during the Paleozoic and Mesozoic eras, before the process of plate tectonics separated each of the component continents into their current configuration. Entries with "Laurasia" continent: …Hyponyms Africa America Antarctica Asia Australia Europe Eurasia Gondwana Laurasia North America Oceania Pangaea South America Origin & history…. A series of continental blocks that now form East and Southeast Asia were later added to Laurasia. Gondwana supercontinent was named by Eduard Suess, a scientist from Austria. See more. Between eastern North America and northwest Africa, a new ocean formed—the Atlantic Ocean, even though Greenland (attached to North America) and Europe were still joined together. Laurasia - New World Encyclopedi . The eastern branch of the Palaeo-Tethys Ocean, however, remained opened while Siberia was added to Laurussia and Gondwana collided with Laurasia. He derived the name from a region in Northern India called Gondwana. [34] Crocodiles also diversified during the Early Cretaceous but were divided into Laurasian and Gondwanan populations; modern crocodiles evolved from the former. Siberia and Kazakhstania finally collided with Baltica in the Late Permian which formed Laurasia. Laurasia ,[1] a portmanteau for Laurentia and Asia,[2] was the more northern of two minor supercontinents that formed part of the Pangaea supercontinent from c. 425 million years ago to 200 Mya. A random rearrangement of the letters in the name (anagram) will give Asailrau. The name Laurasia came up as a result of a combination of Laurentia, which is the North American craton, and Eurasia. This northward drift of terranes across the Tethys also included the Hunic terranes, now spread from Europe to China. Those related to Proto-Laurasia includes:[11], In the vast majority of plate tectonic reconstructions, Laurentia formed the core of the supercontinent Rodinia, but the exact fit of various continents within Rodinia is debated. Laurasia finally divided into the continents after which it is named: Laurentia (now North America) and Eurasia (excluding India and Arabia). Laurasia was a supercontinent.It had been the northern part of the Pangaea global supercontinent. Pangaea broke apart during the Triassic and Jurassic periods of the Mesozoic, separating first into the two supercontinents of Gondwana (or Gondwanaland) to the south and Laurasia to the north, and thereafter into the continents as they are observed today. In the Late Cambrian, the mid-ocean ridge in the Iapetus Ocean subducted beneath Gondwana which resulted in the opening of a series of large back-arc basins. The Columbia (Paleopangaea/Nuna) supercontinent", "Permo–Triassic intraplate magmatism and rifting in Eurasia: implications for mantle plumes and mantle dynamics", "Stratigraphic record of the early Mesozoic breakup of Pangea in the Laurasia-Gondwana rift system", "The Scandinavian Caledonides and their relationship to the Variscan belt", "Late Proterozoic plate tectonics and palaeogeography: a tale of two supercontinents, Rodinia and Pannotia", "Global continental and ocean basin reconstructions since 200Ma", "Rainforest collapse triggered Pennsylvanian tetrapod diversification in Euramerica", "Earth geography from 400 to 250 Ma: a palaeomagnetic, faunal and facies review", "Continental break-up and collision in the Neoproterozoic and Palaeozoic—a tale of Baltica and Laurentia", "Phanerozoic polar wander, palaeogeography and dynamics", "Late Riphean rifting and breakup of Laurasia: data on geochronological studies of ultramafic alkaline complexes in the southern framing of the Siberian craton", "A Paleo-Mesoproterozoic supercontinent: assembly, growth and breakup", "Geological reconstructions of the East Asian blocks: From the breakup of Rodinia to the assembly of Pangea", https://en.wikipedia.org/w/index.php?title=Laurasia&oldid=1015515048, Short description is different from Wikidata, Pages using multiple image with auto scaled images, Wikipedia articles with WorldCat-VIAF identifiers, Creative Commons Attribution-ShareAlike License. It is possible the name you are searching has less than five occurrences per year. The landmass of this earlier period is sometimes referred to as Proto-Laurasia to avoid confusion with the Mesozoic supercontinent. M arsupials [[HN1][1]] such as kangaroos, wombats, bandicoots, and opossums have long attracted widespread attention in public and biological circles alike. The separation of Europe and Greenland occurred around 60 million years ago (in the Paleocene). Laurentia, the Palaeozoic core of North America and continental fragments that now make up part of Europe, collided with Baltica and Avalonia in the Caledonian orogeny c. 430–420 Mya to form Laurussia. [13], Siberia was located near but at some distance from Laurentia's northern margin in most reconstructions. Pangaea is the most recent supercontinent to have existed and the first to be reconstructed by geologists. Left: Laurasia as part of Pannotia 600 Mya. The Rodina Jigsaw Puzzle. Der Zerfall beschränkte sich zunächst auf den Südteil (), mit Öffnung der Tethys nach Westen und Öffnung des Zentral- und Südatlantiks, sowie des Antarktischen und Indischen Ozeans.Geologische Zeugnisse des beginnenden Zerfalls sind unter anderem die triassisch … After these three major landmasses collided, other smaller landmasses collided as well. Weird things about the name Pangaea: The name spelled backwards is Aeagnap. By 33 Mya spreading had ceased in the Labrador Sea and relocated to the Mid-Atlantic Ridge. It was also the name of the subject of poems by the 14th-century Italian poet Petrarch. The "Old Red Continent" is an informal name often used for the Silurian-Carboniferous deposits in the central landmass of Laurussia. The name was borne by the 9th-century Spanish martyr Saint Laura, who was a nun thrown into a vat of molten lead by the Moors. On the other hand, submerged areas occasionally divided continents: the Turgai Sea separated Europe and Asia from the Middle Jurassic to the Oligocene and as this sea or strait dried out, a massive faunal interchange took place and the resulting extinction event in Europe is known as the Grande Coupure. The name combines the names of Laurentia and Eurasia. English-French dictionary of Geography . In the Late Carboniferous Laurussia and Gondwana formed Pangaea. Source: Dictionary of American Family Names ©2013, Oxford University Press. Out of 6,122,890 records in the U.S. Social Security Administration public data, the first name Laurasia was not present. Between 1980 and 2019, 1 girl was born with the Name Laurasia During the Palaeozoic, c. 30–40% of the Laurasia but only 10–20% of Gondwana was covered by shallow marine water. in reference to granite strata in eastern Canada, 1854 (Sir W.E. In today’s geographical formation, most parts of the Northern hemisphere were formed as a result of the Laurasia supercontinent breaking up … Caused by the detachment of subducted mantle slabs, this reorganisation resulted in rising mantle plumes that produced large igneous provinces when they reached the crust. Around 200 million years ago, Pangaea started to break up. [17] The name Gondwana, one way or another, would have been well known to these geologists of the 1860s and early 1870s. Opening of the North Atlantic Ocean 90, 50, and 30 Mya. Laurasia definition, a hypothetical landmass in the Northern Hemisphere near the end of the Paleozoic Era: split apart to form North America and Eurasia. Northern supercontinent that formed part of the Pangaea supercontinent, Laurasia (centre) and Gondwana (bottom) as part of Pangaea 200 Mya (Early Jurassic). By the Middle Devonian, these two provinces had been united into one and the closure of the Rheic Ocean finally united faunas across Laurussia. Antonyms for Laurasia. in accordance with New World Encyclopedia standards. [30], During the Carboniferous–Permian Siberia, Kazakhstan, and Baltica collided in the Uralian orogeny to form Laurasia. Earth subsequently underwent a series of glaciations – the Varanger (c. 650 Mya, also known as Snowball Earth) and the Rapitan and Ice Brook glaciations (c. 610-590 Mya) – both Laurentia and Baltica were located south of 30°S, with the South Pole located in eastern Baltica, and glacial deposits from this period have been found in Laurentia and Baltica but not in Siberia. Siberia moved southwards and joined with Kazakhstania, a small continental region believed today to have been created during the Silurian by extensive volcanism. In the Late Carboniferous Laurussia and Gondwana formed Pangaea. Entries with "Laurasia" continent: …Hyponyms Africa America Antarctica Asia Australia Europe Eurasia Gondwana Laurasia North America Oceania Pangaea South America Origin & history…. The supercontinent was centred on the Equator during the Triassic and Jurassic, a period that saw the emergence of the Pangaean megamonsoon. Zealandia. Pangaea or Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. Pangaea split in the Jurassic into Laurasia and Gondwana to the south.. Laurasia included most of the landmasses which make up today's continents of the northern hemisphere, chiefly Laurentia (the name given to the North American craton), Europe, Baltica, Siberia, Kazakhstan, and China. What are synonyms for Laurasia? eval(ez_write_tag([[250,250],'newworldencyclopedia_org-medrectangle-4','ezslot_2',162,'0','0'])); The continents comprising the supercontinent Laurasia are believed to have formed this landmass on two separate occasions, although the earlier version is often known as "Proto-Laurasia" to distinguish it. In 1937 South African geologist Alexander du Toit proposed that Pangaea was divided into two larger landmasses, Laurasia in the Northern Hemisphere and Gondwana in the Southern Hemisphere, separated by the Tethys Ocean. Lemuria • Laurasian mythology developed somewhere along the emigration path, probably in southwest Asia around 40,000 BCE. [35], North China, South China, Indochina, and Tarim broke off Gondwana during the Silurian-Devonian; Palaeo-Tethys opened behind them. The porcine crsp-3 gene contains an additional exon encoding a calcitonin (CT)-like sequence, but this exon could be a pseudo-exon since its mRNA is undetectable in porcine tissues. Between 1980 and 2019, 1 girl was born with the Name Laurasia The country where the first name Laurasia is the most common is: Quebec Gender of first name Laurasia : Girl 100 . Pangaea • Laurasia finally became an independent continental mass when Pangaea broke up into Gondwana and Laurasia.[3]. [27], During the Cambrian and Early Ordovician, when wide oceans separated all major continents, only pelagic marine organisms, such as plankton, could move freely across the open ocean and therefore the oceanic gaps between continents are easily detected in the fossil records of marine bottom dwellers and non-marine species. The name combines the names of Laurentia, the name given to the North American craton, and Eurasia. The biogeographic origin of snakes is less clear than their early ecology and behavior; however, our results suggest that the ancestor of crown snakes most likely originated on the Mesozoic supercontinent of Gondwana, and indicate the possibility that the ancestor of total-group snakes arose instead on Laurasia. The distribution of the three major groups of dinosaurs – the theropods, sauropods, and ornithischians – was similar that of the crocodiles. The important point here is that H.B. In geology, a supercontinent is a landmass comprising more than one continental core, or craton. Padahal Wegener geus ngirimkeun hiji Superbuana, Pangea, Du Toit ngarahkeun. Logan and T. Sterry Hunt), named for the Laurentian Mountains (where it is found), which are named for the nearby St. Lawrence River (see Laurence).Hence, Laurasia.The Laurentian library in Florence is named for Lorenzo (Latin Laurentius) de' Medici. This article abides by terms of the Creative Commons CC-by-sa 3.0 License (CC-by-sa), which may be used and disseminated with proper attribution. Laurasia was assembled, then broken up, due to the actions of plate tectonics, continental drift and seafloor spreading. Further, a comparison of both the Laurasian and Gondwana mythologies allows distinguishing some common features shared by all mythologies (of the globe, ‘Pan-Gaia’). Weird things about the name Laurasia: The name spelled backwards is Aisarual. H.B Medlicott, a geologist also used the term Gondwana to describe a sedimentary sequence. Tentional stresses across Eurasia developed into a large system of rift basins (Urengoy, East Uralian-Turgay and Khudosey) and floodbasalts in the West Siberian Basin, the Pechora Basin, and South China. The collision between these continents closed the Iapteus Ocean and formed Laurussia, also known as Euramerica or the Old Red Continent, which then covered 37,000,000 km2 (14,000,000 sq mi) including several large Arctic continental blocks. Laurentian. Ur • In biological terms, there are several reasons. Laurasia was the northernmost of two supercontinents that formed part of the Pangaea supercontinent from approximately 300 to 200 million years ago. Siberia and Kazakhstania finally collided with Baltica in the Late Permian to form Laurasia. [25], Pangaea was completely assembled by the Permian except for the Asian blocks. The Cimmerian blocks rifted from Gondwana in the Late Carboniferous. Pangea, supercontinent that incorporated almost all of Earth’s landmasses in early geologic time.