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Þjórsá Lava
The Great Þjórsá Lava ( Icelandic: ''Þjórsárhraunið mikla'' ) is the largest lava flow in Iceland (by both area and volume) and the largest lava that is known to have erupted in a single eruption in the Holocene. It belongs to a group of lavas known as the Tungnaá lavas. It was erupted in the Veiðivötn region, Central Iceland, 8600 years BP (6600 BC). The crater area is covered by younger lavas and eruptives. The Þjórsá Lava does not appear on the surface until 70 km downstream of its supposed crater area. In the lowlands of South Iceland the lava has overflown wide areas, covering the districts Landsveit, Gnúpverjahreppur, Skeið and Flói. The main rivers of South Iceland, Þjórsá and Hvítá/Ölfusá, stream along the borders of the lava to the east and west and the long beach between the river mouths is formed by the lava. The sea level seems to have been around lower than today when the lava was erupted. Along with the rising sea level the ocean has tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Thjorsa Lava
Great may refer to: Descriptions or measurements * Great, a relative measurement in physical space, see Size * Greatness, being divine, majestic, superior, majestic, or transcendent People * List of people known as "the Great" *Artel Great (born 1981), American actor Other uses * ''Great'' (1975 film), a British animated short about Isambard Kingdom Brunel * ''Great'' (2013 film), a German short film * Great (supermarket), a supermarket in Hong Kong * GReAT, Graph Rewriting and Transformation, a Model Transformation Language * Gang Resistance Education and Training Gang Resistance Education And Training, abbreviated G.R.E.A.T., provides a school-based, police officer instructed program that includes classroom instruction and various learning activities. Their intention is to teach the students to avoid gan ..., or GREAT, a school-based and police officer-instructed program * Global Research and Analysis Team (GReAT), a cybersecurity team at Kaspersky Lab *'' Great!'', a 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eyrarbakki
Eyrarbakki () is a fishing village on the south coast of Iceland with a population of about 570 people, not including inhabitants of the prison located there. The village is founded on the Great Þjórsá Lava. History For centuries, the harbour at Eyrarbakki was the main port in the south of the country, and Eyrarbakki was the trading centre for the whole of the southern region extending from Selvogur in the west to Lómagnúpur in the east. By about 1925, however, Eyrarbakki lost its importance as a trading centre. The latter part of the 19th century saw a great increase in the number of oared fishing boats. In fact, although trade and fishing were the main occupations in Eyrarbakki, the natural harbour conditions were not good, and after the bridging of the nearby River Ölfusá, the harbour fell into disuse. In 985 C.E., Bjarni Herjólfsson, a young merchant, sailed from Eyrarbakki headed for Greenland, but instead reached as far as North America. Upon his arrival in Greenla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene Volcanism
The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene has been identified with the current warm period, known as MIS 1. It is considered by some to be an interglacial period within the Pleistocene Epoch, called the Flandrian interglacial.Oxford University Press – Why Geography Matters: More Than Ever (book) – "Holocene Humanity" section https://books.google.com/books?id=7P0_sWIcBNsC The Holocene corresponds with the rapid proliferation, growth and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global sign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Volcanic Zone Of Iceland
East or Orient is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the fact that east is the direction where the Sun rises: ''east'' comes from Middle English ''est'', from Old English ''ēast'', which itself comes from the Proto-Germanic *''aus-to-'' or *''austra-'' "east, toward the sunrise", from Proto-Indo-European *aus- "to shine," or "dawn", cognate with Old High German ''*ōstar'' "to the east", Latin ''aurora'' 'dawn', and Greek ''ēōs'' 'dawn, east'. Examples of the same formation in other languages include Latin oriens 'east, sunrise' from orior 'to rise, to originate', Greek ανατολή anatolé 'east' from ἀνατέλλω 'to rise' and Hebrew מִזְרָח mizraḥ 'east' from זָרַח zaraḥ 'to rise, to shine'. '' Ēostre'', a Germanic goddess of dawn, might have been a personification ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bárðarbunga
Bárðarbunga (), is a stratovolcano located under Vatnajökull in Vatnajökull National Park which is Iceland's most extensive glacier. The second highest mountain in Iceland, above sea level, Bárðarbunga is also part of a volcanic system that is approximately long and wide. Description Bárðarbunga is a subglacial stratovolcano under the ice cap of Vatnajökull glacier in the Vatnajökull National Park in Iceland. It rises to above sea level, making it the second highest mountain in Iceland, about lower than Hvannadalshnjúkur. The caldera is about 80 square kilometres, up to 10 km wide and about deep. The surrounding edges rise to 1,850 metres, but the base is on average close to 1,100 metres. The volcano is covered in ice to a depth of 850m, hiding the glacier-filled crater. The associated volcanic system and fissure swarm is about 190 km long and 25 km wide. Bárðarbunga was a little-known volcano in Iceland due to its remote location and infrequ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skerry
A skerry is a small rocky island, or islet, usually too small for human habitation. It may simply be a rocky reef. A skerry can also be called a low sea stack. A skerry may have vegetative life such as moss and small, hardy grasses. They are often used as resting places by animals such as seals and birds. Etymology The term ''skerry'' is derived from the Old Norse ', which means a rock in the sea (which in turn derives from the Proto-Indo-European root *''sker''-, "cut", in the sense of a rock cut off from the land). The Old Norse term ' was brought into the English language via the Scots language word spelled or . It is a cognate of the Scandinavian languages' words for ''skerry'' – Icelandic, fo, sker, da, skær, sv, skär, no, skjær / skjer, found also in german: Schäre, fi, kari, et, skäär, lv, šēra, lt, Šcheras and russian: шхеры (). In Scottish Gaelic, it appears as ', e.g. Sula Sgeir, in Irish as '','' in Welsh as '','' and in Manx as ''.'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phenocryst
300px, feldspathic phenocrysts. This granite, from the Switzerland">Swiss side of the Mont Blanc massif, has large white plagioclase phenocrysts, triclinic minerals that give trapezoid shapes when cut through). 1 euro coins, 1 euro coin (diameter 2.3 cm) for scale. A phenocryst is an early forming, relatively large and usually conspicuous crystal distinctly larger than the grains of the rock groundmass of an igneous rock. Such rocks that have a distinct difference in the size of the crystals are called porphyries, and the adjective porphyritic is used to describe them. Phenocrysts often have euhedral forms, either due to early growth within a magma, or by post-emplacement recrystallization. Normally the term ''phenocryst'' is not used unless the crystals are directly observable, which is sometimes stated as greater than .5 millimeter in diameter. Phenocrysts below this level, but still larger than the groundmass crystals, are termed ''microphenocrysts''. Very large phenocrysts a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feldspar
Feldspars are a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagioclase'' (sodium-calcium) feldspars and the ''alkali'' (potassium-sodium) feldspars. Feldspars make up about 60% of the Earth's crust, and 41% of the Earth's continental crust by weight. Feldspars crystalize from magma as both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar is known as anorthosite. Feldspars are also found in many types of sedimentary rocks. Compositions The feldspar group of minerals consists of tectosilicates, silicate minerals in which silicon ions are linked by shared oxygen ions to form a three-dimensional network. Compositions of major elements in common feldspars can be expressed in terms of three endmembers: * potassium feldspar (K-spar) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porphyritic
Porphyritic is an adjective used in geology to describe igneous rocks with a distinct difference in the size of mineral crystals, with the larger crystals known as phenocrysts. Both extrusive and intrusive rocks can be porphyritic, meaning all types of igneous rocks can display some degree of porphyritic texture. Most Porphyritic rocks have bimodal size ranges, meaning the rock is composed of two distinct sizes of crystal. In extrusive rocks, the phenocrysts are surrounded by a fine-grained (aphanitic) matrix or groundmass of volcanic glass or non-visible crystals, commonly seen in porphyritic basalt. Porphyritic intrusive rocks have a matrix with individual crystals easily distinguished with the eye, but one group of crystals appearing clearly much bigger than the rest, as in a porphyritic granite. The term comes from the Ancient Greek (), meaning "purple". Purple was the color of royalty, and the "imperial porphyry" was a deep purple igneous rock with large crystals of pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stokkseyri
Stokkseyri () is a small town in Southern Iceland, with a population of around 445. Overview Founded around 900 AD by the settler Hásteinn Atlason, it was an important fishing and trading village in previous times. The town is founded on the Great Þjórsá lava The Great Þjórsá Lava ( Icelandic: ''Þjórsárhraunið mikla'' ) is the largest lava flow in Iceland (by both area and volume) and the largest lava that is known to have erupted in a single eruption in the Holocene. It belongs to a group of lav .... The local school is Barnaskólinn á Eyrarbakka og Stokkseyri. The artistic experimental duo Jónsi & Alex wrote a song named after the town which appears on their album Riceboy Sleeps. The Knarraros lighthouse, which is a unique blend of functionalism and art nouveau style, is located about away. A famous inhabitant of Stokkseyri was Stokkseyrar-Dísa. It is home to the football team UMF Stokkseyri. References Fishing communities Populated places i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selfoss (town)
Selfoss () is a town in southern Iceland on the banks of the Ölfusá river. It is the seat of the municipality of Árborg. The Icelandic Route 1 (Iceland), Route 1 runs through the town on its way between Hveragerði and Hella, Iceland, Hella. The town is a centre of commerce and small industries with a population of 9000 (2021), making it the largest residential area in South Iceland. Geography Selfoss is located about 11 km inland from the southwestern coast of Iceland, and 50 km from Reykjavík. It is the major town and the administrative seat of the Southern Region (Iceland), Southern Region. The closest other towns are Eyrarbakki, Stokkseyri and Hveragerði. Climate Similar to the rest of the southern coast of Iceland, Selfoss has a subpolar oceanic climate (Köppen climate classification, Köppen: ''Cfc'') with cool summers and cold winters, although relatively mild for its high latitude. Precipitation is abundant year round, with October usually seeing the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icelandic Language
Icelandic (; is, íslenska, link=no ) is a North Germanic language spoken by about 314,000 people, the vast majority of whom live in Iceland, where it is the national language. Due to being a West Scandinavian language, it is most closely related to Faroese, western Norwegian dialects, and the extinct language, Norn. The language is more conservative than most other Germanic languages. While most of them have greatly reduced levels of inflection (particularly noun declension), Icelandic retains a four- case synthetic grammar (comparable to German, though considerably more conservative and synthetic) and is distinguished by a wide assortment of irregular declensions. Icelandic vocabulary is also deeply conservative, with the country's language regulator maintaining an active policy of coining terms based on older Icelandic words rather than directly taking in loanwords from other languages. Since the written language has not changed much, Icelandic speakers can read classic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
