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Mount Berlin
Mount Berlin is a glacier-covered volcano in Marie Byrd Land, Antarctica, from the Amundsen Sea. It is a roughly mountain with parasitic vents that consists of two coalesced volcanoes: Berlin proper with the Berlin Crater and Merrem Peak with a crater, away from Berlin. The summit of the volcano is above sea level. It has a volume of and rises from the West Antarctic Ice Sheet. It is part of the Marie Byrd Land Volcanic Province. Trachyte is the dominant volcanic rock and occurs in the form of lava flows and pyroclastic rocks. The volcano began erupting during the Pliocene and was active into the late Pleistocene and the Holocene. Several tephra layers encountered in ice cores all over Antarctica – but in particular at Mount Moulton – have been linked to Mount Berlin, which is the most important source of such tephras in the region. The tephra layers were formed by explosive eruptions that generated high eruption columns. Presently, fumarolic activity occurs at Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wells Saddle
The Flood Range () is a range of large snow-covered mountains extending in an east–west direction for about and forming a right angle with the southern end of the Ames Range in Marie Byrd Land, Antarctica. Location The Flood Range is south of the Hull Glacier and Kirkpatrick Glacier, which drain into Hull Bay on the Southern Ocean coast of Marie Byrd Land. The eastern end of the range is immediately south of the Ames Range. There are no named features in the ice sheet to the south of the range. The north slopes of the range form the western end of the Usas Escarpment. Discovery and name The Flood Range was discovered by the Byrd Antarctic Expedition (ByrdAE) in 1934 from a great distance. Reconnaissance flights by the United States Antarctic Service (USAS) (1939–41) explored the range. The principle mountain was named "Mount Hal Flood" by Richard E. Byrd for his uncle, the Hon. Henry D. Flood, U.S. Representative from Virginia. The name was subsequently transferred b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marie Byrd Land
Marie Byrd Land (MBL) is an unclaimed region of Antarctica. With an area of , it is the largest unclaimed territory on Earth. It was named after the wife of American naval officer Richard E. Byrd, who explored the region in the early 20th century. The territory lies in West Antarctica, east of the Ross Ice Shelf and the Ross Sea and south of the Pacific Ocean portion of the Antarctic or Southern Ocean, extending eastward approximately to a line between the head of the Ross Ice Shelf and Eights Coast. It stretches between 158°W and 103°24'W. The inclusion of the area between the Rockefeller Plateau and Eights Coast is based upon Byrd's exploration. Overview Because of its remoteness, even by Antarctic standards, most of Marie Byrd Land (the portion east of 150°W) has not been claimed by any sovereign state. It is by far the largest single unclaimed territory on Earth, with an area of , including Eights Coast, immediately east of Marie Byrd Land. In 1939, United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Core
An ice core is a core sample that is typically removed from an ice sheet or a high mountain glacier A glacier (; or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires .... Since the ice forms from the incremental buildup of annual layers of snow, lower layers are older than upper ones, and an ice core contains ice formed over a range of years. Cores are Ice drilling, drilled with hand Auger (drill), augers (for shallow holes) or powered drills; they can reach depths of over two miles (3.2 km), and contain ice up to 800,000 years old. The physical properties of the ice and of material trapped in it can be used to reconstruct the climate over the age range of the core. The proportions of different oxygen and hydrogen isotopes provide information about Paleothermometer, ancient temperatures, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the structural integrity of such a chamber, greatly diminishing its capacity to support its own roof and any substrate or rock resting above. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a Volcanic crater, crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur over the course of a century, the formation of a caldera is a rare event, occurring only a few times within a given window of 100 years. Only eight caldera-forming collapses are known to have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Summit Crater
A volcanic crater is an approximately circular depression in the ground caused by volcanic activity. It is typically a bowl-shaped feature containing one or more vents. During volcanic eruptions, molten magma and volcanic gases rise from an underground magma chamber, through a conduit, until they reach the crater's vent, from where the gases escape into the atmosphere and the magma is erupted as lava. A volcanic crater can be of large dimensions, and sometimes of great depth. During certain types of explosive eruptions, a volcano's magma chamber may empty enough for an area above it to subside, forming a type of larger depression known as a caldera. Geomorphology In most volcanoes, the crater is situated at the top of a mountain formed from the erupted volcanic deposits such as lava flows and tephra. Volcanoes that terminate in such a summit crater are usually of a conical form. Other volcanic craters may be found on the flanks of volcanoes, and these are commonly referred to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Field Trip
A field trip or excursion is a journey by a group of associated peers, such as coworkers or school students, to a place away from their normal environment for the purpose of education or leisure, either within their country or abroad. When arranged by a school administration for students, it is also known as school trip in the United Kingdom, Australia, Kenya, New Zealand and Bangladesh, and school tour in Ireland. A 2022 study, which used randomized controlled trial data, found that culturally enriching field trips led students to show a greater interest in arts, greater tolerance for people with different views, and boosted their educational outcomes. Overview The purpose of the field trip is usually ''observation'' for education, non-experimental research or to provide students with experiences outside their everyday activities, such as going camping with teachers and their classmates. The aim of this research is to observe the subject in its natural state and possibly col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hobbs Coast
Hobbs Coast () is that portion of the coast of Marie Byrd Land, Antarctica extending from Cape Burks to a point on the coast opposite eastern Dean Island, at , or between the Ruppert Coast in the west and the Bakutis Coast in the east. It stretches from 136°50′W to 127°35′. The coast was discovered by the US Antarctic Service (1939–1941) and named for Professor William H. Hobbs of the University of Michigan, a glaciologist specializing in polar geography and history. The United States Geological Survey completely mapped the coast from ground surveys and U.S. Navy The United States Navy (USN) is the maritime service branch of the United States Department of Defense. It is the world's most powerful navy with the largest displacement, at 4.5 million tons in 2021. It has the world's largest aircraft ... air photos, 1959–1965. References Coasts of Antarctica Landforms of Marie Byrd Land {{MarieByrdLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Antarctica
West Antarctica, or Lesser Antarctica, one of the two major regions of Antarctica, is the part of that continent that lies within the Western Hemisphere, and includes the Antarctic Peninsula. It is separated from East Antarctica by the Transantarctic Mountains and is covered by the West Antarctic Ice Sheet. It lies between the Ross Sea (partly covered by the Ross Ice Shelf), and the Weddell Sea (largely covered by the Filchner-Ronne Ice Shelf). It may be considered a giant peninsula, stretching from the South Pole towards the tip of South America. West Antarctica is largely covered by the Antarctic ice sheet, but there have been signs that climate change is having some effect and that this ice sheet may have started to shrink slightly. Over the past 50 years, the west coast of the Antarctic Peninsula has been – and still is – one of the most rapidly warming parts of the planet, and the coasts of the Peninsula are the only parts of West Antarctica that become (in summer) i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fumarolic Ice Tower
A fumarolic ice tower is a tower of ice produced by fumaroles of volcanic activity in an environment whose ambient temperature is below the freezing point of water. They are often underlain by large ice caves. Mount Erebus Mount Erebus () is the southernmost active volcano on Earth, located on Ross Island in the Ross Dependency in Antarctica. With a summit elevation of , it is the second most prominent mountain in Antarctica (after Mount Vinson) and the second ..., the world's southernmost active volcano, is one producer of these ice towers. The ambient temperature at its location is always well below water's freezing point, and the diffuse degassing of carbon dioxide through the steaming warm ground around its flanks causes ice to first melt, then vaporize, and then accumulate into chimney-like towers. Mount Berlin is another Antarctic volcanic mountain that produced such towers. References Glaciovolcanism Fumaroles {{Volcanism-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
