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Lugnaquillia
LugnaquillaLugnaquilla . . (), at , is the 11th–highest peak in on the Arderin list, and 13th–highest on the Vandeleur-Lynam list, and the highest Irish mountain outside of |
Glenmalure
Glenmalure () is a 20-kilometre long U-shaped glacial valley in the Wicklow Mountains in Ireland. Glenmalure is an important base for climbing in the Wicklow mountains, and particularly accessing the massif of Lugnaquilla, and contains one of the earliest An Óige youth hostels in Ireland. Glenmalure was also an important historical area and the site of the Battle of Glenmalure in 1580, as well as various events in the Irish Rebellion of 1798. Geography Glenmalure is a 20-kilometre long glacial valley in the southern sector of the Wicklow Mountains and is one of the longest glacial valleys in Ireland. A number of adjoining hanging valleys, most notably the Fraughan Rock Glen, feed into Glenmalure valley, which was formed by feeder glaciers in the last ice age. The valley runs from the northwest down to the southeast. Its western flank is dominated by the large massif of Lugnaquilla , the County Top for Wicklow, and the Provincial Top for Leinster. The steep walls of its eas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forest
A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' Food and Agriculture Organization (FAO) defines a forest as, "Land spanning more than 0.5 hectares with trees higher than 5 meters and a canopy cover of more than 10 percent, or trees able to reach these thresholds ''in situ''. It does not include land that is predominantly under agricultural or urban use." Using this definition, '' Global Forest Resources Assessment 2020'' (FRA 2020) found that forests covered , or approximately 31 percent of the world's land area in 2020. Forests are the predominant terrestrial ecosystem of Earth, and are found around the globe. More than half of the world's forests are found in only five countries (Brazil, Canada, China, Russia, and the United States). The largest share of forests (45 percent) are in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leinster
Leinster ( ; ga, Laighin or ) is one of the provinces of Ireland, situated in the southeast and east of Ireland. The province comprises the ancient Kingdoms of Meath, Leinster and Osraige. Following the 12th-century Norman invasion of Ireland The Anglo-Norman invasion of Ireland took place during the late 12th century, when Anglo-Normans gradually conquered and acquired large swathes of land from the Irish, over which the kings of England then claimed sovereignty, all allegedly sanc ..., the historic provinces of Ireland, "fifths" of Leinster and Meath gradually merged, mainly due to the impact of the Pale, which straddled both, thereby forming the present-day province of Leinster. The ancient kingdoms were shired into a number of counties of Ireland#2.1 Pre-Norman sub-divisions, counties for administrative and judicial purposes. In later centuries, local government legislation has prompted further sub-division of the historic counties. Leinster has no official funct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nunatak
A nunatak (from Inuit ''nunataq'') is the summit or ridge of a mountain that protrudes from an ice field or glacier that otherwise covers most of the mountain or ridge. They are also called glacial islands. Examples are natural pyramidal peaks. When rounded by glacial action, smaller rock promontories may be referred to as rognons. The word is of Greenlandic origin and has been used in English since the 1870s. Description The term is typically used in areas where a permanent ice sheet is present and the nunataks protrude above the sheet.J. J. Zeeberg, ''Climate and Glacial History of the Novaya Zemlya Archipelago, Russian Arctic''. pp. 82–84 Nunataks present readily identifiable landmark reference points in glaciers or ice caps and are often named. While some nunataks are isolated, sometimes they form dense clusters, such as Queen Louise Land in Greenland. Nunataks are generally angular and jagged, which hampers the formation of glacial ice on their tops, although snow can a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Last Glacial Maximum
The Last Glacial Maximum (LGM), also referred to as the Late Glacial Maximum, was the most recent time during the Last Glacial Period that ice sheets were at their greatest extent. Ice sheets covered much of Northern North America, Northern Europe, and Asia and profoundly affected Earth's climate by causing drought, desertification, and a large drop in sea levels. Based on changes in position of ice sheet margins dated via terrestrial cosmogenic nuclides and radiocarbon dating, growth of ice sheets commenced 33,000 years ago and maximum coverage was between 26,500 years and 19–20,000 years ago, when deglaciation commenced in the Northern Hemisphere, causing an abrupt rise in sea level. Decline of the West Antarctica ice sheet occurred between 14,000 and 15,000 years ago, consistent with evidence for another abrupt rise in the sea level about 14,500 years ago. Glacier fluctuations around the Strait of Magellan suggest the peak in glacial surface area was constrained to betwee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magma Chamber
A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it upwards. If the magma finds a path to the surface, then the result will be a volcanic eruption; consequently, many volcanoes are situated over magma chambers. These chambers are hard to detect deep within the Earth, and therefore most of those known are close to the surface, commonly between 1 km and 10 km down. Dynamics of magma chambers Magma rises through cracks from beneath and across the crust because it is less dense than the surrounding rock. When the magma cannot find a path upwards it pools into a magma chamber. These chambers are commonly built up over time, by successive horizontal or vertical magma injections. Influx of new magma causes reaction of pre-existing crystals and the pressure in the chamber to increase. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ordovician
The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start of the Silurian Period Mya. The Ordovician, named after the Celtic Britons, Welsh tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same Rock (geology), rock beds in North Wales in the Cambrian and Silurian systems, respectively. Lapworth recognized that the fossil fauna in the disputed Stratum, strata were different from those of either the Cambrian or the Silurian systems, and placed them in a system of their own. The Ordovician received international approval in 1960 (forty years after Lapworth's death), when it was adopted as an official period of the Paleozoic Era by the International Union of Geological Sciences, Intern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schist
Schist ( ) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes or plates. This texture (geology), texture reflects a high content of platy minerals, such as micas, talc, chlorite group, chlorite, or graphite. These are often interleaved with more granular minerals, such as feldspar or quartz. Schist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium Metamorphism#Metamorphic grades, grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. Schist metamorphosed from mudstone is particularly common and is often very rich in mica (a ''mica schist''). Where the type of the original rock (the protolith) is discernible, the schist is us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite
Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or ''granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) contain almost no dark minerals. Granite is nearly alway ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Survey Of Ireland
Geological Survey Ireland or Geological Survey of IrelandS.I. No. 300/2002 - Communications, Energy and Geological Survey of Ireland (Transfer of Departmental Administration and Ministerial Functions) Order 2002 ( ga, Suirbhéireacht Gheolaíochta Éireann), founded in 1845, is the National Earth Science agency of Ireland. Overview Geological Survey Ireland is a division of the Department of Communications, Climate Action and Environment and is based in Beggars Bush Barracks in Dublin. Its multidisciplinary staff work in sections such as groundwater, bedrock mapping (consisting of bedrock and quaternary/geotechnical), information management, heritage, marine and minerals. It is responsible for providing geological advice and information, and for the acquisition of data for this purpose. Geological Survey Ireland produces maps, reports and databases, and acts as a knowledge centre and project partner in a number of aspects of Irish geology. The organisation managed the Irish Nation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lugh
Lugh or Lug (; ga, label=Modern Irish, Lú ) is a figure in Irish mythology. A member of the Tuatha Dé Danann, a group of supernatural beings, Lugh is portrayed as a warrior, a king, a master craftsman and a savior.Olmsted, Garrett. ''The Gods of the Celts and the Indo-Europeans''. University of Innsbruck, 1994. p.117 He is associated with skill and mastery in multiple disciplines, including the arts.Monaghan, Patricia. ''The Encyclopedia of Celtic Mythology and Folklore''. Infobase Publishing, 2004. pp.296-297 Lugh also has associations with oaths, truth and the law, and therefore with rightful kingship.Koch, John T. ''Celtic Culture: A Historical Encyclopedia''. ABC-CLIO, 2006. p.1200 Lugh is linked with the harvest festival of Lughnasadh, which bears his name. His most common epithets are ''Lámfada'' ("long hand" or "long arm", possibly for his skill with a spear or his ability as a ruler) and ''Samildánach'' ("equally skilled in many arts"). In mythology, Lugh is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patrick Weston Joyce
Patrick Weston Joyce, commonly known as P. W. Joyce (1827 – 7 January 1914) was an Irish historian, writer and music collector, known particularly for his research in Irish etymology and local place names of Ireland. Biography He was born in Ballyorgan in the Ballyhoura Mountains, on the borders of counties Limerick and Cork in Ireland, and grew up in nearby Glenosheen. The family claimed descent from one Seán Mór Seoighe (fl. 1680), a stonemason from Connemara, County Galway. Robert Dwyer Joyce was a younger brother. Joyce was a native Irish speaker who started his education at a hedge school. He then attended school in Mitchelstown, County Cork. Joyce started work in 1845 with the Commission of National Education. He became a teacher and principal of the Model School, Clonmel. In 1856 he was one of fifteen teachers selected to re-organize the national school system in Ireland. Meanwhile he earned his B.A. in 1861 and M.A. in 1863 from Trinity College, Dublin. He was p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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