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Johnson Glacier (British Columbia)
Johnson Glacier () is a glacier flowing north between the McDonald Heights and Bowyer Butte to merge with the Getz Ice Shelf on the coast of Marie Byrd Land, Antarctica. It was mapped by the United States Geological Survey from surveys and U.S. Navy air photos, 1959–65, and was named by the Advisory Committee on Antarctic Names for Roland L. Johnson, Boatswain's Mate, U.S. Navy, a crew member of the during exploration of this coast in the 1961–62 season. See also *Mount Rubin de la Borbolla *Strawn Pass Strawn Pass () is a broad pass on the south side of McDonald Heights that connects the heads of Kirkpatrick Glacier and Johnson Glacier, in Marie Byrd Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959 ... References Glaciers of Marie Byrd Land {{MarieByrdLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier
A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its Ablation#Glaciology, ablation over many years, often Century, centuries. It acquires distinguishing features, such as Crevasse, crevasses and Serac, seracs, as it slowly flows and deforms under stresses induced by its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water. On Earth, 99% of glacial ice is contained within vast ice sheets (also known as "continental glaciers") in the polar regions, but glaciers may be found in mountain ranges on every continent other than the Australian mainland, including Oceania's high-latitude oceanic island countries such as New Zealand. Between lati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McDonald Heights
The McDonald Heights () are broad, mainly snow-covered heights about long and rising over between Cape Burks and Morris Head on the coast of Marie Byrd Land, Antarctica. The heights are bounded southward by Hull Glacier, Kirkpatrick Glacier and Johnson Glacier. The feature was photographed from aircraft of the United States Antarctic Service, 1939–1941, was observed and partially mapped from during February 1962, and was mapped in detail by the United States Geological Survey in 1965. The heights were named by the Advisory Committee on Antarctic Names after Captain Edwin A. McDonald, U.S. Navy, Deputy Commander of the U.S. Naval Support Force, Antarctica, in 1962, and Commander of the Task Unit that explored this coast aboard ''Glacier'' in February 1962. See also * Mount Rubin de la Borbolla * Strawn Pass Strawn Pass () is a broad pass on the south side of McDonald Heights that connects the heads of Kirkpatrick Glacier and Johnson Glacier, in Marie Byrd Land. Mapped by United ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bowyer Butte
Bowyer Butte () is a steep-cliffed eminence with a nearly flat summit, wide and high, located between the lower ends of the Johnson Glacier and the Venzke Glacier on the coast of Marie Byrd Land, Antarctica. Location Bowyer Butte is south of the Getz Ice Shelf. To its west, the Johnson Glacier separates it from Hagey Ridge. To its east, the Venzke Glacier separates it from the Perry Range. Features and nearby features include, from north to south, Hoyt Head, Mount Kohnen, Mount Gester and Serlin Spur. Discovery and name Bowyer Butte was discovered and photographed from the air by the United States Antarctic Service (USAS), 1939–41. It was named by the United States Advisory Committee on Antarctic Names (US-ACAN) for Donald W. Bowyer, a United States Antarctic Research Program meteorologist at Byrd Station in 1962. Features Hoyt Head . High rock headland forming the northeast end of Bowyer Butte, located at the west side of Venzke Glacier. The headland was first seen and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Getz Ice Shelf
The Getz Ice Shelf is the largest Antarctic ice shelf along the SE Pacific-Antarctic coastline, over long and from wide, bordering the Hobbs and Bakutis Coasts of Marie Byrd Land between the McDonald Heights and Martin Peninsula. Several large islands are partially or wholly embedded in the ice shelf, pinning the calving front. Summer temperature and salinity measurements from 1994 to 2010 show the shelf is subject to more changeable oceanic forcing than other Antarctic shelves. Beneath cold surface waters, the thermocline was ~200 m shallower in 2007 than in 2000, indicative of shifting access of deep water to the continental shelf and ice shelf base. The calculated area-average basal melt rates was between 1.1 and 4.1 m of ice per year, making Getz the largest source of meltwater to the Southern Ocean. The ice shelf westward of Siple Island was discovered by the United States Antarctic Service (USAS) in December 1940. The portion eastward of Siple Island was first delineat ... [...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] |
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] |
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] |
Roland L
Roland (; frk, *Hrōþiland; lat-med, Hruodlandus or ''Rotholandus''; it, Orlando or ''Rolando''; died 15 August 778) was a Frankish military leader under Charlemagne who became one of the principal figures in the literary cycle known as the Matter of France. The historical Roland was military governor of the Breton March, responsible for defending Francia's frontier against the Bretons. His only historical attestation is in Einhard's ''Vita Karoli Magni'', which notes he was part of the Frankish rearguard killed in retribution by the Basques in Iberia at the Battle of Roncevaux Pass. The story of Roland's death at Roncevaux Pass was embellished in later medieval and Renaissance literature. The first and most famous of these epic treatments was the Old French ''Chanson de Roland'' of the 11th century. Two masterpieces of Italian Renaissance poetry, the ''Orlando Innamorato'' and ''Orlando Furioso'' (by Matteo Maria Boiardo and Ludovico Ariosto respectively), are even further ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Rubin De La Borbolla
Mount Rubin de la Borbolla () is an ice-covered mountain (1,090 m) in the southeast extremity of McDonald Heights, overlooking Johnson Glacier from the west in Marie Byrd Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959–65. Named by Advisory Committee on Antarctic Names (US-ACAN) for George S. Rubin de la Borbolla, meteorologist at Plateau Station Plateau Station is an inactive American research and South Pole—Queen Maud Land Traverse support base on the central Antarctic Plateau. Construction on the site started on December 13, 1965, and the first traverse team (named SPQML II) arri ..., 1968. References Mountains of Marie Byrd Land {{MarieByrdLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strawn Pass
Strawn Pass () is a broad pass on the south side of McDonald Heights that connects the heads of Kirkpatrick Glacier and Johnson Glacier, in Marie Byrd Land. Mapped by United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1959–69. Named by Advisory Committee on Antarctic Names (US-ACAN) for Lawrence W. Strawn, glaciologist at Byrd Station The Byrd Station is a former research station established by the United States during the International Geophysical Year by U.S. Navy Seabees during Operation Deep Freeze II in West Antarctica. History A joint Army, Navy, Air Force, and Marin ..., 1967–68. References Mountain passes of Antarctica Landforms of Marie Byrd Land {{MarieByrdLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
