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Harwell Glacier
Gough Glacier () is an Antarctic glacier about long, flowing from the northern slopes of the Prince Olav Mountains and the base of the Lillie Range and trending northward to the Ross Ice Shelf, between the Gabbro Hills and the Bravo Hills. It was named by the Southern Party of the New Zealand Geological Survey Antarctic Expedition (1963–64) for A.L. Gough, surveyor of the party. Course Gough Glacier is the largest of the glaciers between the Liv Glacier and the Shackleton Glacier. Gough Glacier rises in the Prince Olav Mountains between Mount Smithson and Mount Hall. The Harwell glacier enters it from the left (west) near its head. It flows northwest to Mount Dodge. The Krout Glacier enters from the left before Mount Dodge, and the Holzrichter Glacier enters from the left beyond Mount Dodge. The Gough Glacier then turns to the north and flows to the Ross Ice Shelf between the Gabbro Hills to the west and the Bravo Hills to the east. Geology The area around the glacier ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ross Ice Shelf
The Ross Ice Shelf is the largest ice shelf of Antarctica (, an area of roughly and about across: about the size of France). It is several hundred metres thick. The nearly vertical ice front to the open sea is more than long, and between high above the water surface. Ninety percent of the floating ice, however, is below the water surface. Most of Ross Ice Shelf is in the Ross Dependency claimed by New Zealand. It floats in, and covers, a large southern portion of the Ross Sea and the entire Roosevelt Island located in the east of the Ross Sea. The ice shelf is named after Sir James Clark Ross, who discovered it on 28 January 1841. It was originally called "The Barrier", with various adjectives including "Great Ice Barrier", as it prevented sailing further south. Ross mapped the ice front eastward to 160° W. In 1947, the U.S. Board on Geographic Names applied the name "Ross Shelf Ice" to this feature and published it in the original U.S. Antarctic Gazetteer. In Januar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granodiorite
Granodiorite () is a coarse-grained (phaneritic) intrusive igneous rock similar to granite, but containing more plagioclase feldspar than orthoclase feldspar. The term banatite is sometimes used informally for various rocks ranging from granite to diorite, including granodiorite. Composition According to the QAPF diagram, granodiorite has a greater than 20% quartz by volume, and between 65% and 90% of the feldspar is plagioclase. A greater amount of plagioclase would designate the rock as tonalite. Granodiorite is felsic to intermediate in composition. It is the intrusive igneous equivalent of the extrusive igneous dacite. It contains a large amount of sodium (Na) and calcium (Ca) rich plagioclase, potassium feldspar, quartz, and minor amounts of muscovite mica as the lighter colored mineral components. Biotite and amphiboles often in the form of hornblende are more abundant in granodiorite than in granite, giving it a more distinct two-toned or overall darker appearan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Wade
The Prince Olav Mountains is a mountain range of the Queen Maud Mountains in Antarctica stretching from Shackleton Glacier to Liv Glacier at the head of the Ross Ice Shelf. Discovered in 1911 by Roald Amundsen on the way to the South Pole, and named by him for the then Olav V of Norway, Crown Prince Olav of Norway. Key mountains This range includes the following mountains and peaks: Allaire Peak Allaire Peak is a rock Summit (topography), peak standing northwest of Mount Hall, between the Gough Glacier, Gough and Le Couteur Glaciers. Named by Advisory Committee on Antarctic Names (US-ACAN) for Captain C.J. Allaire, USA, on the Staff of the Commander, U.S. Naval Support Force, Antarctica, during U.S. Navy Operation Deep Freeze 1963. Mount Campbell Mount Campbell is a prominent mountain, peak standing southeast of Mount Wade. Discovered and photographed by the United States Antarctic Program, USAS (1939–41), and surveyed by A.P. Crary (1957–58). Named by Crary for Joel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Sellery
The Prince Olav Mountains is a mountain range of the Queen Maud Mountains in Antarctica stretching from Shackleton Glacier to Liv Glacier at the head of the Ross Ice Shelf. Discovered in 1911 by Roald Amundsen on the way to the South Pole, and named by him for the then Crown Prince Olav of Norway. Key mountains This range includes the following mountains and peaks: Allaire Peak Allaire Peak is a rock peak standing northwest of Mount Hall, between the Gough and Le Couteur Glaciers. Named by Advisory Committee on Antarctic Names (US-ACAN) for Captain C.J. Allaire, USA, on the Staff of the Commander, U.S. Naval Support Force, Antarctica, during U.S. Navy Operation Deep Freeze 1963. Mount Campbell Mount Campbell is a prominent peak standing southeast of Mount Wade. Discovered and photographed by the USAS (1939–41), and surveyed by A.P. Crary (1957–58). Named by Crary for Joel Campbell of the U.S. Coast and Geodetic Survey, Antarctic Project Leader for geomagnetic ope ... [...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] |
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] |
Dolerite
Diabase (), also called dolerite () or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained to aphanitic chilled margins which may contain tachylite (dark mafic glass). ''Diabase'' is the preferred name in North America, while ''dolerite'' is the preferred name in the rest of the English-speaking world, where sometimes the name ''diabase'' refers to altered dolerites and basalts. Some geologists prefer to avoid confusion by using the name ''microgabbro''. The name ''diabase'' comes from the French ', and ultimately from the Greek - meaning "act of crossing over, transition". Petrography Diabase normally has a fine but visible texture of euhedral lath-shaped plagioclase crystals (62%) set in a finer matrix of clinopyroxene, typically augite (20–29%), with minor olivine (3% up to 12% in olivine diabase), magnetite (2%), and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gabbro
Gabbro () is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is chemically equivalent to rapid-cooling, fine-grained basalt. Much of the Earth's oceanic crust is made of gabbro, formed at mid-ocean ridges. Gabbro is also found as plutons associated with continental volcanism. Due to its variant nature, the term ''gabbro'' may be applied loosely to a wide range of intrusive rocks, many of which are merely "gabbroic". By rough analogy, gabbro is to basalt as granite is to rhyolite. Etymology The term "gabbro" was used in the 1760s to name a set of rock types that were found in the ophiolites of the Apennine Mountains in Italy. It was named after Gabbro, a hamlet near Rosignano Marittimo in Tuscany. Then, in 1809, the German geologist Christian Leopold von Buch used the term more restrictively in his descri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adamellite
Quartz monzonite is an intrusive, felsic, igneous rock that has an approximately equal proportion of orthoclase and plagioclase feldspars. It is typically a light colored phaneritic (coarse-grained) to porphyritic granitic rock. The plagioclase is typically intermediate to sodic in composition, andesine to oligoclase. Quartz is present in significant amounts. Biotite and/or hornblende constitute the dark minerals. Because of its coloring, it is often confused with granite, but whereas granite contains more than 20% quartz, quartz monzonite is only 5–20% quartz. Rock with less than five percent quartz is classified as monzonite. A rock with more alkali feldspar is a syenite whereas one with more plagioclase is a quartz diorite.Classification of Igneous Rocks The fine grained |
Mount Dodge
The Prince Olav Mountains is a mountain range of the Queen Maud Mountains in Antarctica stretching from Shackleton Glacier to Liv Glacier at the head of the Ross Ice Shelf. Discovered in 1911 by Roald Amundsen on the way to the South Pole, and named by him for the then Crown Prince Olav of Norway. Key mountains This range includes the following mountains and peaks: Allaire Peak Allaire Peak is a rock peak standing northwest of Mount Hall, between the Gough and Le Couteur Glaciers. Named by Advisory Committee on Antarctic Names (US-ACAN) for Captain C.J. Allaire, USA, on the Staff of the Commander, U.S. Naval Support Force, Antarctica, during U.S. Navy Operation Deep Freeze 1963. Mount Campbell Mount Campbell is a prominent peak standing southeast of Mount Wade. Discovered and photographed by the USAS (1939–41), and surveyed by A.P. Crary (1957–58). Named by Crary for Joel Campbell of the U.S. Coast and Geodetic Survey, Antarctic Project Leader for geomagnetic ope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
