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Hekla 3 Eruption
The Hekla 3 eruption (H-3) is considered the most severe eruption of Hekla during the Holocene. It threw about 7.3 km3 of volcanic rock into the atmosphere, placing its Volcanic Explosivity Index (VEI) at 5. This would have caused a volcanic winter, cooling temperatures in the Northern Hemisphere for several years afterwards. An eighteen-year span of global cooling that is recorded in Irish bog oaks has been attributed to H-3. The eruption is detectable in Greenland ice cores, the bristlecone pine sequence, and the Irish oak sequence of extremely narrow growth rings. Andy Baker's team of researchers dated it to 1021 BC ±130. A "high chronology" (earlier) interpretation of the above results is preferred by Baker, based also on growth of stalagmites. In Sutherland, northwest Scotland, a spurt of four years of doubled annual luminescent growth banding of calcite in a stalagmite is datable to 1135 BC ±130. A rival, "low-chronology" interpretation of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hekla
Hekla (), or Hecla, is an active stratovolcano in the south of Iceland with a height of . Hekla is one of Iceland's most active volcanoes; over 20 eruptions have occurred in and around the volcano since the year 1210. During the Middle Ages, the Icelandic Norse called the volcano the "Gateway to Hell" and the idea spread over much of Europe. The volcano's frequent large and often initially explosive eruptions have covered much of Iceland with tephra, and these layers can be used to date eruptions of Iceland's other volcanoes. Approximately 10% of the tephra created in Iceland in the last thousand years has come from Hekla, amounting to . Cumulatively, the volcano has produced one of the largest volumes of lava of any in the world in the last millennium, around . Etymology In Icelandic language, Icelandic ''Hekla'' is the word for a short hooded cloak, which may relate to the frequent cloud cover on the summit. An early Latin source refers to the mountain as ''Mons chasuble, Cas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcite
Calcite is a Carbonate minerals, carbonate mineral and the most stable Polymorphism (materials science), polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on Scratch hardness, scratch hardness comparison. Large calcite crystals are used in optical equipment, and limestone composed mostly of calcite has numerous uses. Other polymorphs of calcium carbonate are the minerals aragonite and vaterite. Aragonite will change to calcite over timescales of days or less at temperatures exceeding 300 °C, and vaterite is even less stable. Etymology Calcite is derived from the German , a term from the 19th century that came from the Latin word for Lime (material), lime, (genitive ) with the suffix ''-ite'' used to name minerals. It is thus a Doublet (linguistics), doublet of the word ''wikt:chalk, chalk''. When applied by archaeology, archaeologists and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2nd Millennium BC
File:2nd millennium BC montage.jpg, 400x400px, From top left clockwise: Hammurabi, Babylonian king, best known for his Code of Hammurabi, code of laws; The gold Mask of Tutankhamun, funerary mask of Tutankhamun has become a symbol of ancient Egyptian civilization and its enduring legacy; Nebra sky disc is considered the oldest concrete representation of astronomical phenomena, such as the sun, moon, and stars; Mask of Agamemnon; Hieroglyphs from the tomb of Seti I; The Lion Gate of Hattusa is a testament to the architectural and artistic skills of the Hittites (Background: Bull-Leaping Fresco ca. 1450-1400 BC). rect 23 27 345 383 Hammurabi rect 433 16 775 443 Tutankhamun rect 869 18 1264 338 Nebra sky disc rect 103 408 375 680 Mask of Agamemnon rect 466 470 833 705 Egyptian hieroglyphs rect 870 392 1262 656 Hittites rect 1 1 1279 719 Minoan civilization The 2nd millennium BC spanned the years 2000 BC to 1001 BC. In the Ancient Near East, it marks the transition from the Middle to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
11th Century BC
The 11th century BC comprises all years from 1100 BC to 1001 BC. Although many human societies were literate in this period, some of the individuals mentioned below may be apocryphal rather than historically accurate. The world in the 11th century BC Events * 1089 BC: Melanthus, legendary King of Athens, dies after a reign of 37 years and is succeeded by his son Codrus. * 1069 BC: Ramses XI dies, ending the Twentieth Dynasty. He is succeeded by Smendes I, who founds the Twenty-first Dynasty. * 1068 BC: Codrus, legendary King of Athens, dies in battle against Dorian invaders after a reign of 21 years. Athenian tradition considers him the last king to have held absolute power. Modern historians consider him the last king whose life account is part of Greek mythology. He is succeeded by his son Medon. * 1050 BC: Philistines capture the Ark of the Covenant from Israel in battle. (Approximate date) * 1048 BC: Medon, King of Athens, dies after a reign of 20 years and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanism Of Iceland
:''The volcano system in Iceland that started activity on August 17, 2014, and ended on February 27, 2015, is Bárðarbunga.'' :''The volcano in Iceland that erupted in May 2011 is Grímsvötn.'' Iceland experiences frequent volcanic activity, due to its location both on the Mid-Atlantic Ridge, a divergent tectonic plate boundary, and being over a hotspot. Nearly thirty volcanoes are known to have erupted in the Holocene epoch; these include Eldgjá, source of the largest lava eruption in human history. Some of the various eruptions of lava, gas and ash have been both destructive of property and deadly to life over the years, as well as disruptive to local and European air travel. Volcanic systems and volcanic zones of Iceland Holocene volcanism in Iceland is mostly to be found in the ''Neovolcanic Zone'', comprising the Reykjanes volcanic belt (RVB), the West volcanic zone (WVZ), the Mid-Iceland belt (MIB), the East volcanic zone (EVZ) and the North volcanic zone (NVZ). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Volcanoes In Iceland
There are too many presumed extinct or now inactive volcanic features to list all of these below, so most monogenetic volcanoes can not be mentioned individually. This list of volcanoes in Iceland only includes major active and dormant volcano, volcanic mountains, of which at least 18 vents have erupted since human settlement of Iceland began around 900 AD. Subsequent to the main list a list is presented that classifies the volcanoes into zones, systems and types. This is in the context that there are several classification systems and many of the volcanoes may have separate shallow magma chambers and a deeper common magma source. Where a major vent is part of a larger volcano this is indicated in the list comment. Since some of these vent eruptions have been very large, disruptive or been regarded in popular culture as a separate volcano they have been included in the list but where this is not the case it is not appropriate to duplicate or create entries. So for minor vent eru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iceland Hotspot
The Iceland hotspot is a hotspot that is partly responsible for the high volcanic activity that has formed the Iceland Plateau and the island of Iceland. It contributes to understanding the geological deformation of Iceland. Iceland is one of the most active volcanic regions in the world, with eruptions occurring on average roughly every three years (in the 20th and 21st century until 2010 there were 45 volcanic eruptions on and around Iceland). About a third of the basaltic lavas erupted in recorded history have been produced by Icelandic eruptions. Notable eruptions have included that of Eldgjá, a fissure of Katla, in 934 (the world's largest basaltic eruption ever witnessed), Laki in 1783 (the world's second largest), and several eruptions beneath ice caps, which have generated devastating glacial bursts, most recently in 2010 after the eruption of Eyjafjallajökull. Iceland's location astride the Mid-Atlantic Ridge, where the Eurasian and North American Plates a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geography Of Iceland
Iceland is an island country at the confluence of the Atlantic Ocean, North Atlantic and Arctic Ocean, Arctic oceans, east of Greenland and immediately south of the Arctic Circle, atop the constructive boundary of the northern Mid-Atlantic Ridge. The island country is the world's List of islands by area#Islands, 18th largest in area and one of the most List of sovereign states and dependent territories by population density, sparsely populated. It is the westernmost European country when not including Greenland and has more land covered by glaciers than continental Europe. Its total size is and possesses an exclusive economic zone of . Statistics Iceland is an island country in Northern Europe, straddling the Eurasian and North American plates between the Greenland Sea and the North Atlantic Ocean, northwest of the British Isles. Extent (locations outside mainland in parentheses) :North: Rifstangi, 66°32′3" N (Kolbeinsey, 67°08,9 N) :South: Kötlutangi, 63°23′6" N ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bronze Age Collapse
The Late Bronze Age collapse was a period of societal collapse in the Mediterranean basin during the 12th century BC. It is thought to have affected much of the Eastern Mediterranean and Near East, in particular Egypt, Anatolia, the Aegean, eastern Libya, and the Balkans. The collapse was sudden, violent, and culturally disruptive for many Bronze Age civilizations, creating a sharp material decline for the region's previously existing powers. The palace economy of Mycenaean Greece, the Aegean region, and Anatolia that characterized the Late Bronze Age disintegrated, transforming into the small isolated village cultures of the Greek Dark Ages, which lasted from to , and were followed by the better-known Archaic Age. The Hittite Empire spanning Anatolia and the Levant collapsed, while states such as the Middle Assyrian Empire in Mesopotamia and the New Kingdom of Egypt survived in weakened forms. Other cultures such as the Phoenicians enjoyed increased autonomy and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ramesses III
Usermaatre Meryamun Ramesses III was the second Pharaoh of the Twentieth dynasty of Egypt, Twentieth Dynasty in Ancient Egypt. Some scholars date his reign from 26 March 1186 to 15 April 1155 BC, and he is considered the last pharaoh of the New Kingdom of Egypt, New Kingdom to have wielded substantial power. His long reign saw the decline of Egyptian political and economic power, linked to a series of invasions and internal economic problems that also plagued pharaohs before him. This coincided with a decline in the cultural sphere of Ancient Egypt. However, his successful defense was able to slow down the decline, although it still meant that his successors would have a weaker military. He has also been described as a "warrior Pharaoh" due to his strong military strategies. He led the way by defeating the invaders known as "the Sea Peoples", who had caused destruction in other civilizations and empires. He was able to save Egypt from collapsing at the time when Late Bronze Age c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1159 BC
The 1150s BC is a decade that lasted from 1159 BC to 1150 BC. Events and trends * 1159 BC—The Hekla 3 eruption triggers an 18-year period of climatic worsening. (estimated date, disputed) * 1154 BC—Death of King Menelaus of Sparta (estimated date), thirty years after the traditional date for the Fall of Troy in the Homeric Trojan War. * 1154 BC—Medinet Habu (temple): records a people called the ''P-r-s-t'' (conventionally ''Peleset'') among those who fought with Egypt in Ramesses III's reign. * 1152 BC, 14 November—First historically confirmed workers' strike, under Pharaoh Ramses III in ancient Egypt. * 1150 BC— Demophon, King of Athens and veteran of the Trojan War, dies after a reign of 33 years and is succeeded by his son Oxyntes. Significant people * 1153 BC—Death of pharaoh Ramesses III of Egypt * Nebuchadnezzar I, king of Babylon Babylon ( ) was an ancient city located on the lower Euphrates river in southern Mesopotamia, within modern-day Hillah, Ira ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
