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Mount Luyendyk
Mount Luyendyk is a summit in the western Fosdick Mountains of the Ford Ranges of Marie Byrd Land, West Antarctica. It forms a prominent exposure in the northwestern Iphigene massif. The peak is named in recognition of Professor Bruce P. Luyendyk of the University of California, Santa Barbara, who was active in ground- and ocean-based Antarctic research from 1989 to 2015, significantly advancing the scientific knowledge of the Ross Embayment region of Antarctica. Luyendyk led two on-land expeditions in the Ford Ranges, and was principal investigator for five marine geophysical expeditions in the Ross Sea. In December, 1989, geologists of the UC Santa Barbara FORCE expedition traveled by snowmobile-sledge to Mt. Luyendyk, for the purpose of sampling for rock magnetism, petrology, and geochronology studies. Between 2005 and 2012, geologists from Colorado College, University of Maryland, and Curtin University (Perth) returned to Mt. Luyendyk for structural geology and petrology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fosdick Mountains
The Fosdick Mountains () are an east–west trending mountain range with marked serrate outlines, standing along the south side of Balchen Glacier at the head of Block Bay, in the Ford Ranges of Marie Byrd Land, Antarctica. Location The Fosdick Mountains are on the north side of the base of the Guest Peninsula. The Balchen Glacier enters Block Bay to their north, and the Crevasse Valley Glacier flows past their south to enter the Sulzberger Ice Shelf. Northern features from west to east include Mount Avers, Mount Lockhart, Mount Bitgood, Mount Colombo, Bird Bluff, Recess Nunatak and Mount Perkins. Southern features from west to east include Mount Ferranto, Mount Getz, Dermas Bluff, Mount Richardson and Vulcan Nunatak. Geology and geography The dominant topography is tall, steep-sided ridges, trending north-south, with peak elevations spanning 1000 to 1200 m. The range consists of the Fosdick Metamorphic Rocks of migmatite gneiss and granite. Metamorphism occurred in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geochronology
Geochronology is the science of Chronological dating, determining the age of rock (geology), rocks, fossils, and sediments using signatures inherent in the rocks themselves. Absolute geochronology can be accomplished through radioactive isotopes, whereas relative geochronology is provided by tools such as paleomagnetism and stable isotope ratios. By combining multiple geochronological (and biostratigraphic) indicators the precision of the recovered age can be improved. Geochronology is different in application from biostratigraphy, which is the science of assigning sedimentary rocks to a known geological period via describing, cataloging and comparing fossil floral and faunal assemblages. Biostratigraphy does not ''directly'' provide an absolute age determination of a rock, but merely places it within an ''interval'' of time at which that fossil assemblage is known to have coexisted. Both disciplines work together hand in hand, however, to the point where they share the same syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detachment Fault
A detachment fault is a gently dipping normal fault associated with large-scale extensional tectonics. Detachment faults often have very large displacements (tens of km) and juxtapose unmetamorphosed hanging walls against medium to high-grade metamorphic footwalls that are called metamorphic core complexes. They are thought to have formed as either initially low-angle structures or by the rotation of initially high-angle normal faults modified also by the isostatic effects of tectonic denudation. They may also be called denudation faults. Examples of detachment faulting include: *The Snake Range detachment system of the Basin and Range Province of western North America which was active during the Miocene *The Nordfjord-Sogn detachment of western Norway active during the Devonian Period *The Whipple detachment in southeastern California Detachment faults have been found on the sea floor close to divergent plate boundaries characterised by a limited supply of upwelling magma, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ninth and longest geological period of the entire Phanerozoic. The name is derived from the Latin , 'chalk', which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation . The Cretaceous was a period with a relatively warm climate, resulting in high Sea level#Local and eustatic, eustatic sea levels that created numerous shallow Inland sea (geology), inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was largely ice-free, although there is some evidence of brief periods of glaciation during the cooler first half, and forests extended to the poles. Many of the dominant taxonomic gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plutonic Rock
Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form ''intrusions'', such as batholiths, dikes, sills, laccoliths, and volcanic necks.Intrusive RocksIntrusive rocks accessdate: March 27, 2017.Igneous intrusive rocks, accessdate: March 27, 2017.Britannica.comintrusive rock , geology , Britannica.com accessdate: March 27, 2017. Intrusion is one of the two ways igneous rock can form. The other is extrusion, such as a volcanic eruption or similar event. An intrusion is any body of intrusive igneous rock, formed from magma that cools and solidifies within the crust of the planet. In contrast, an ''extrusion'' consists of extrusive rock, formed above the surface of the crust. Some geologists use the term plutonic rock synonymously with intrusive rock, but other geologists subdivide intrusive rock, by crystal size, into coarse-grained plutonic rock (typically formed deeper in the Earth's crust in batholiths or stocks) and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Geology
Structural geology is the study of the three-dimensional distribution of rock units with respect to their deformational histories. The primary goal of structural geology is to use measurements of present-day rock geometries to uncover information about the history of deformation ( strain) in the rocks, and ultimately, to understand the stress field that resulted in the observed strain and geometries. This understanding of the dynamics of the stress field can be linked to important events in the geologic past; a common goal is to understand the structural evolution of a particular area with respect to regionally widespread patterns of rock deformation (e.g., mountain building, rifting) due to plate tectonics. Use and importance The study of geologic structures has been of prime importance in economic geology, both petroleum geology and mining geology. Folded and faulted rock strata commonly form traps that accumulate and concentrate fluids such as petroleum and natural gas. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtin University
Curtin University (previously Curtin University of Technology and Western Australian Institute of Technology) is an Australian public university, public research university based in Bentley, Western Australia, Bentley, Perth, Western Australia. It is named after John Curtin, Prime Minister of Australia from 1941 to 1945, and is Western Australia's largest university, with students in . WAIT was established in 1966. Curtin was conferred university status after the Parliament of Western Australia passed legislation in 1986. Since then, the university has expanded its presence and has campuses in Curtin Singapore, Singapore, Curtin University Malaysia, Malaysia, Dubai and Curtin Mauritius, Mauritius, and has ties with 90 exchange universities in 20 countries. The university comprises five main faculties with over 95 specialists centres. It had a campus in Sydney from 2005 to 2016. Curtin University is a member of the Australian Technology Network. Curtin is active in research in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado College
Colorado College is a private college, private liberal arts colleges in the United States, liberal arts college in Colorado Springs, Colorado. Founded in 1874 by Thomas Nelson Haskell in his daughter's memory, the college offers over 40 majors and 30 minors, and enrolls approximately 2,000 undergraduates at its campus. Colorado College is a member of the Associated Colleges of the Midwest, and is a QuestBridge partner. Notable alumni include Diana DeGette, Elizabeth Cheney, Liz Cheney, Dutch Clark, Thomas Hornsby Ferril, James Heckman, Steve Sabol, Ken Salazar, and Marc Webb. Most of the university's varsity sports teams compete in NCAA Division III, with the exception of NCAA Division I, Division I teams in men's hockey and women's soccer. History Colorado College was founded in 1874 on land designated by U.S. Civil War veteran General William Jackson Palmer, the founder of the Denver and Rio Grande Railroad and of Colorado Springs.Colorado CollegeHistory of Colorado Colleg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ross Sea
The Ross Sea is a deep bay of the Southern Ocean in Antarctica, between Victoria Land and Marie Byrd Land and within the Ross Embayment, and is the southernmost sea on Earth. It derives its name from the British explorer James Clark Ross who visited this area in 1841. To the west of the sea lies Ross Island and Victoria Land, to the east Roosevelt Island and Edward VII Peninsula in Marie Byrd Land, while the southernmost part is covered by the Ross Ice Shelf, and is about from the South Pole. Its boundaries and area have been defined by the New Zealand National Institute of Water and Atmospheric Research as having an area of . The circulation of the Ross Sea is dominated by a wind-driven ocean gyre and the flow is strongly influenced by three submarine ridges that run from southwest to northeast. The circumpolar deep water current is a relatively warm, salty and nutrient-rich water mass that flows onto the continental shelf at certain locations. The Ross Sea is covered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ford Ranges
The Ford Ranges () are a collection of mountain groups and ranges standing east of Sulzberger Ice Shelf and Block Bay in the northwest part of Marie Byrd Land, Antarctica. Location The Ford Ranges lie along the coast of Marie Byrd Land to the south and east of the Sulzberger Ice Shelf and to the east of Block Bay. The ranges and major glaciers are, from southwest to northeast, Hershey Ridge, Haines Mountains, Hammond Glacier, Swope Glacier, Mackay Mountains, Boyd Glacier, Sarnoff Mountains, Allegheny Mountains, Clark Mountains, Arthur Glacier, Denfeld Mountains, Crevasse Valley Glacier, Chester Mountains, Fosdick Mountains, Balchen Glacier and Phillips Mountains. A 1945 report defines the Southern Ford Ranges as the ranges between McKinley Peak and the Balchen Glacier, which excludes the Phillips Mountains. They cover an area of about . This portion of the mountainous coastland of Marie Byrd Land is one of the few areas in Antarctica where there are enough roc ... [...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 (also known as the Antarctic 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 Climate of Antarctica#Precipitation, 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 temperature recorded on Earth, lowest measured temperature on Earth, . The coastal regions can reach temperatures over in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ross Embayment
The Ross Embayment is a large region of Antarctica, comprising the Ross Ice Shelf and the Ross Sea, that lies between East and West Antarctica. Extent The continent of Antarctica has two major divisions; West Antarctica in mostly western longitudes and East Antarctica in mostly eastern longitudes. East Antarctica is the larger and has a higher average elevation. Separating the two subcontinents is a lower elevation topographic region occupied by the Ross Ice Shelf and the Ross Sea. This region is referred to as the Ross Embayment. The embayment comprises an area of approximately . It includes the Ross Sea () and the Ross Ice Shelf (as of 2013, ). The name is most commonly used in the scientific literature, at times along with the West Antarctic Rift System, which is of larger extent and has geologic meaning. Because the rift system includes the embayment, the latter is considered to lie in West Antarctica. The informal use of the name 'Ross Embayment' tends to denote a small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
