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Olliver Peak
The Gabbro Hills () are a group of rugged ridges and coastal hills which border the Antarctic Ross Ice Shelf between Barrett Glacier and Gough Glacier and extend south to Ropebrake Pass. They were so named by the Southern Party of the New Zealand Geological Survey Antarctic Expedition (1963–64) because of the prevalence of 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 che ..., a dark, plutonic rock, in the area. References Mountain ranges of Antarctica Dufek Coast {{DufekCoast-geo-stub ... [...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] |
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] |
Barrett Glacier
Shackleton Glacier is a major Antarctic glacier, over long and from 8 to 16 km (5 to 10 mi) wide, descending from the polar plateau from the vicinity of Roberts Massif and flowing north through the Queen Maud Mountains to enter the Ross Ice Shelf between Mount Speed and Waldron Spurs. The Roberts Zealand GSAE (1961–62), who named it for A.R. Roberts, leader at Scott Massif is a remarkable snow-free massif exceeding 2,700 metres (8,860 ft) and about 155 km2 (60 sq mi) in area. It was by the Southern Party of New USAS (1939–41) and named by US-SCAN for Sir Ernest Shackleton, Anglo-Irish Antarctic explorer. See also * List of glaciers in the Antarctic * Mount Greenlee Mount Greenlee () is a steep-sided, jagged mountain in Antarctica, high; of metamorphic rock, it overlooks the west side of Shackleton Glacier just east of Mount Butters. It was named by F. Alton Wade, leader of the Texas Tech Shackleton Glacier ... References * * Queen Maud Mountai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gough 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 has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ropebrake Pass
The Gabbro Hills () are a group of rugged ridges and coastal hills which border the Antarctic Ross Ice Shelf between Barrett Glacier and Gough Glacier and extend south to Ropebrake Pass. They were so named by the Southern Party of the New Zealand Geological Survey Antarctic Expedition (1963–64) because of the prevalence of 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 che ..., a dark, plutonic rock, in the area. References Mountain ranges of Antarctica Dufek Coast {{DufekCoast-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand Geological Survey Antarctic Expedition
The New Zealand Geological Survey Antarctic Expedition (NZGSAE) describes a series of scientific explorations of the continent Antarctica. The expeditions were notably active throughout the 1950s and 1960s. Features named by the expeditions 1957–1958 expedition The 1957–1958 expedition went to the Ross Dependency and named the Borchgrevink Glacier. Other features named include: * Carter Ridge * Felsite Island * Halfway Nunatak * Hedgehog Island * Moraine Ridge 1958–1959 expedition * Cadwalader Beach * Cape Hodgson * Carter Ridge * Isolation Point * Mountaineer Range * Mount Aurora * Mount Hayward * Mount Henderson (White Island) * Mount Bird. 1960–1961 expedition * Deverall Island * Lonewolf Nunataks 1961–1962 expedition * Aurora Heights * The Boil * Ford Spur * Graphite Peak * Half Century Nunatak * Half Dome Nunatak * Hump Passage * Last Cache Nunatak * Lookout Dome * Montgomerie Glacier * Mount Fyfe * Mount Macdonald * Snowshoe Pass * Turret Nu ... [...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] |
Mountain Ranges Of Antarctica
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
