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Crosson Ice Shelf
Crosson Ice Shelf () is an Antarctic ice shelf, about wide, north and northeast of Mount Murphy along the Walgreen Coast of Marie Byrd Land. The ice shelf is nurtured by Smith, Pope, Vane, and Haynes Glaciers. It was mapped by the U.S. Geological Survey from surveys and from U.S. Navy air photos, 1959–66, and named by the Advisory Committee on Antarctic Names for Commander W.E. Crosson, U.S. Navy, Commanding Officer of the Antarctic Construction Group during Operation Deep Freeze 1973. See also * Ice shelves of Antarctica This is a list of Antarctic ice shelves. Ice shelves are attached to a large portion of the Antarctic coastline. Their total area is 1,541,700 km2. Names are also listed in the Scientific Committee on Antarctic Research, Gazetteer. The ... References {{MarieByrdLand-geo-stub Ice shelves of Antarctica Bodies of ice of Marie Byrd Land ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Shelf
An ice shelf is a large floating platform of ice that forms where a glacier or ice sheet flows down to a coastline and onto the ocean surface. Ice shelves are only found in Antarctica, Greenland, Northern Canada, and the Russian Arctic. The boundary between the floating ice shelf and the anchor ice (resting on bedrock) that feeds it is the grounding line. The thickness of ice shelves can range from about to . In contrast, sea ice is formed on water, is much thinner (typically less than ), and forms throughout the Arctic Ocean. It is also found in the Southern Ocean around the continent of Antarctica. The movement of ice shelves is principally driven by gravity-induced pressure from the grounded ice. That flow continually moves ice from the grounding line to the seaward front of the shelf. In steady state, about half of Antarctica's ice shelf mass is lost to basal melt and half is lost to calving, but the relative importance of each process varies significantly between ice s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Murphy
Mount Murphy is a massive, snow-covered and highly eroded shield volcano in Marie Byrd Land of West Antarctica with steep, rocky slopes. It is directly south of Bear Peninsula and is bounded by the Smith, Pope and Haynes Glaciers. Volcanic activity began in the Miocene with the eruption of basaltic and trachytic lava. Volcanism on the slopes of the volcano resumed much later during the Pleistocene, with a parasitic cone having been K–Ar dated to 0.9 million years old. Delineated from aerial photographs taken by US Navy Operation Highjump in January 1947. Named by US-ACAN for Robert Cushman Murphy of the American Museum of Natural History, noted authority on Antarctic and sub-Antarctic bird life. While serving on the whaler, he charted the Bay of Isles region of South Georgia. Features Bucher Peak () at , is one of the highest peaks in the west-central summit area of the Mount Murphy massif. Buettner Peak is a sharp peak rising midway along the north wall of Roos Glacier ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walgreen Coast
The Walgreen Coast () is a portion of the coast of Antarctica between Cape Herlacher and Cape Waite, or between Eights Coast on the east and Bakutis Coast in the west. It is part of Marie Byrd Land. It extends from 103°24'W to 114°12'W. It was discovered by Richard E. Byrd and members of the US Antarctic Service (USAS) by flights from the USS Bear, USS ''Bear'' during February 1940. The Walgreen Coast was named by Byrd after Charles R. Walgreen, president of the retail company Walgreens at the time, who was a funder of the Byrd Antarctic Expedition, 1933–1935, and assisted in equipping the ''Bear'' for the USAS, 1939–1941. This coast was mapped in detail by the United States Geological Survey from ground surveys and U.S. Navy air photographs, 1959–66. It contains Thwaites Glacier, also known as the "Doomsday Glacier", for its major contributions to sea level rise as a result of climate change. See also *Wright Pass References Coasts of Antarctica Landforms of M ... [...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 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 President Frankl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smith Glacier
Smith Glacier is a low-gradient Antarctic glacier, over 160 km (100 mi) long, draining from Toney Mountain in an ENE direction to Amundsen Sea. A northern distributary, Kohler Glacier, drains to Dotson Ice Shelf but the main flow passes to the sea between Bear Peninsula and Mount Murphy, terminating at Crosson Ice Shelf. The Smith Glacier is located in the western region of Antarctica. Latitude: 75° 2' 59'' S. Longitude 111° 12' 0'' W. Mapped by USGS from ground surveys and USN air photos, 1959–65. Named by US-ACAN after Philip M. Smith (Smith Bluffs), Deputy Director, Office of Polar Programs, National Science Foundation, who in the period 1956–71 participated in many expeditions to Antarctica in field and supervisory capacities. In 2001, Dr. Andrew Shepherd, a research fellow at the Center for Polar Observation and Modeling at University College London, said that Smith Glacier was losing mass quickly and contributing to the slow rise of the oceans. In 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pope Glacier
Pope Glacier () is a glacier about 20 nautical miles (37 km) long, flowing north along the west side of Mount Murphy to Crosson Ice Shelf on Walgreen Coast, in Marie Byrd Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959–66. Named by Advisory Committee on Antarctic Names The Advisory Committee on Antarctic Names (ACAN or US-ACAN) is an advisory committee of the United States Board on Geographic Names responsible for recommending commemorative names for features in Antarctica. History The committee was established ... (US-ACAN) after Maj. Donald R. Pope, (CE) USA, civil engineer on the staff of the Commander, Naval Support Force, Antarctica, 1965–67. Glaciers of Marie Byrd Land {{MarieByrdLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vane Glacier
Vane Glacier () is a broad glacier that drains the northeast slopes of Mount Murphy in Marie Byrd Land. It enters Crosson Ice Shelf between Eisberg Head and Boyd Head. It was mapped by the United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959–66, and was named by the Advisory Committee on Antarctic Names (US-ACAN) for Gregg A. Vane, a U.S. Exchange Scientist at the Soviet station Novolazarevskaya Station Novolazarevskaya Station (russian: Станция Новолазаревская) is a Russian, formerly Soviet, Antarctic research station. The station is located at Schirmacher Oasis, Queen Maud Land, from the Antarctic coast, from which it is ... in 1972. References Glaciers of Marie Byrd Land {{MarieByrdLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haynes Glacier
Haynes Glacier () is a broad glacier flowing to the Walgreen Coast of Marie Byrd Land, Antarctica, to the east of Mount Murphy. It was mapped by the United States Geological Survey from surveys and U.S. Navy air photos, 1959–66, and was named by the Advisory Committee on Antarctic Names after Major John W. Haynes, United States Marine Corps, an aircraft pilot on Operation Deep Freeze Operation Deep Freeze (OpDFrz or ODF) is codename for a series of United States missions to Antarctica, beginning with "Operation Deep Freeze I" in 1955–56, followed by "Operation Deep Freeze II", "Operation Deep Freeze III", and so on. (There w ... 1967 and 1968, who made a photographic flight over this glacier on January 1, 1967. References Glaciers of Marie Byrd Land {{MarieByrdLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advisory Committee On Antarctic Names
The Advisory Committee on Antarctic Names (ACAN or US-ACAN) is an advisory committee of the United States Board on Geographic Names responsible for recommending commemorative names for features in Antarctica. History The committee was established in 1943 as the Special Committee on Antarctic Names (SCAN). It became the Advisory Committee on Antarctic Names in 1947. Fred G. Alberts was Secretary of the Committee from 1949 to 1980. By 1959, a structured nomenclature was reached, allowing for further exploration, structured mapping of the region and a unique naming system. A 1990 ACAN gazeeter of Antarctica listed 16,000 names. Description The United States does not recognise territorial boundaries within Antarctica, so ACAN assigns names to features anywhere within the continent, in consultation with other national nomenclature bodies where appropriate, as defined by the Antarctic Treaty System. The research and staff support for the ACAN is provided by the United States Geologi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Deep Freeze
Operation Deep Freeze (OpDFrz or ODF) is codename for a series of United States missions to Antarctica, beginning with "Operation Deep Freeze I" in 1955–56, followed by "Operation Deep Freeze II", "Operation Deep Freeze III", and so on. (There was an initial operation before Admiral Richard Byrd proposed 'Deep Freeze'). Given the continuing and constant US presence in Antarctica since that date, "Operation Deep Freeze" has come to be used as a general term for US operations in that continent, and in particular for the regular missions to resupply US Antarctic bases, coordinated by the United States military. Task Force 199 was involved. Prior to International Geophysical Year The U.S. Navy already had a record of earlier exploration in Antarctica. As early as 1839, Captain Charles Wilkes led the first U.S. Naval expedition into Antarctic waters. In 1929, Admiral Richard E. Byrd established a naval base at Little America I, led an expedition to explore further inland, and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geographic Names Information System
The Geographic Names Information System (GNIS) is a database of name and locative information about more than two million physical and cultural features throughout the United States and its territories, Antarctica, and the associated states of the Marshall Islands, Federated States of Micronesia, and Palau. It is a type of gazetteer. It was developed by the United States Geological Survey (USGS) in cooperation with the United States Board on Geographic Names (BGN) to promote the standardization of feature names. Data were collected in two phases. Although a third phase was considered, which would have handled name changes where local usages differed from maps, it was never begun. The database is part of a system that includes topographic map names and bibliographic references. The names of books and historic maps that confirm the feature or place name are cited. Variant names, alternatives to official federal names for a feature, are also recorded. Each feature receives a per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Geological Survey
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
