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Owen Fracture Zone
The Owen fracture zone (OFZ), though Misnomer, misnamed as a fracture zone, is a transform fault in the northwest Indian Ocean that separates the Arabian plate, Arabian and African plates from the Indian plate. Extending north-northeast from where the Carlsberg Ridge meets the Aden Ridge, Sheba ridge in the south to the Makran Trench, Makran Subduction Zone in the north, it represents the port side of the northward motion of the Indian subcontinent during the Late Cretaceous–Palaeogene break-up of Gondwana. Slip along the Owen fracture zone is occurring at /yr, the slowest rate on Earth, which means the Arabian plate moves northward faster than the Indian plate (4 vs. 2 mm/yr). In some usages, the name Owen Transform Fault is used to denote the short section between the end of the Aden-Sheba ridge and the Carlsberg Ridge. Additionally, this area has been called the Aden–Owen–Carlsberg triple junction, although the Carlsberg Ridge is offset from the point where the Owe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Owen
Owen may refer to: People and fictional characters * Owen (name), including a list of people and fictional characters with the given name or surname Places United States * Owen, Missouri, a ghost town * Owen, Wisconsin * Owen County, Indiana * Owen County, Kentucky * Owen Township (other) * Mount Owen (Colorado) * Mount Owen (Wyoming) Elsewhere * Owen Island, South Shetland Islands, Antarctica * Owen Sound, a city in Ontario, Canada * Owen, South Australia, a small town * Owen, Germany, town in Baden-Württemberg * Mount Owen (other) * Port Owen, South Africa Ships * , a destroyer that took part in World War II and the Korean War * , a British Royal Navy frigate Other uses * Owen (automobile), an American car made from 1910 to 1914 * Owen (musician), a solo project of American indie rock singer-songwriter Mike Kinsella ** Owen (album), ''Owen'' (album), a 2001 album * Owen (hippopotamus), a young orphan hippopotamus who formed a bond with a giant tortoise * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gondwana
Gondwana ( ; ) was a large landmass, sometimes referred to as a supercontinent. The remnants of Gondwana make up around two-thirds of today's continental area, including South America, Africa, Antarctica, Australia (continent), Australia, Zealandia, Arabian Peninsula, Arabia, and the Indian subcontinent. Gondwana was formed by the Accretion (geology), accretion of several cratons (large stable blocks of the Earth's crust), beginning with the East African Orogeny, the collision of India and Geography of Madagascar, Madagascar with East Africa, and culminating in with the overlapping Brasiliano orogeny, Brasiliano and Kuunga orogeny, Kuunga orogenies, the collision of South America with Africa, and the addition of Australia and Antarctica, respectively. Eventually, Gondwana became the largest piece of continental crust of the Paleozoic Era, covering an area of some , about one-fifth of the Earth's surface. It fused with Laurasia during the Carboniferous to form Pan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fracture Zones
Fracture is the appearance of a crack or complete separation of an object or material into two or more pieces under the action of stress. The fracture of a solid usually occurs due to the development of certain displacement discontinuity surfaces within the solid. If a displacement develops perpendicular to the surface, it is called a normal tensile crack or simply a crack; if a displacement develops tangentially, it is called a shear crack, slip band, or dislocation. Brittle fractures occur without any apparent deformation before fracture. Ductile fractures occur after visible deformation. Fracture strength, or breaking strength, is the stress when a specimen fails or fractures. The detailed understanding of how a fracture occurs and develops in materials is the object of fracture mechanics. Strength Fracture strength, also known as breaking strength, is the stress at which a specimen fails via fracture. This is usually determined for a given specimen by a tensile te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Anomaly
In geophysics, a magnetic anomaly is a local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by overlying material. The magnetic variation (geomagnetic reversals) in successive bands of ocean floor parallel with mid-ocean ridges was important evidence for seafloor spreading, a concept central to the theory of plate tectonics. Measurement Magnetic anomalies are generally a small fraction of the magnetic field. The total field ranges from 25,000 to 65,000 nanoteslas (nT). To measure anomalies, magnetometers need a sensitivity of 10 nT or less. There are three main types of magnetometer used to measure magnetic anomalies: # The fluxgate magnetometer was developed during World War II to detect submarines. It measures the component along a particular axis of the sensor, so it needs to be oriented. On land, it is often oriented vertically, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accretionary Wedge
An accretionary wedge or accretionary prism forms from sediments accreted onto the non- subducting tectonic plate at a convergent plate boundary. Most of the material in the accretionary wedge consists of marine sediments scraped off from the downgoing slab of oceanic crust, but in some cases the wedge includes the erosional products of volcanic island arcs formed on the overriding plate. An accretionary complex is a current (in modern use) or former accretionary wedge. Accretionary complexes are typically made up of a mix of turbidites of terrestrial material, basalts from the ocean floor, and pelagic and hemipelagic sediments. For example, most of the geological basement of Japan is made up of accretionary complexes. Materials within an accretionary wedge Accretionary wedges and accreted terranes are not equivalent to tectonic plates, but rather are associated with tectonic plates and accrete as a result of tectonic collision. Materials incorporated in accretionary wedge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sverdrup
In oceanography, the sverdrup (symbol: Sv) is a non- SI metric unit of volumetric flow rate, with equal to . It is equivalent to the SI derived unit cubic hectometer per second (symbol: hm3/s or hm3⋅s−1): is equal to . It is used almost exclusively in oceanography to measure the volumetric rate of transport of ocean currents. It is named after Harald Sverdrup. One sverdrup is about five times what is carried at the estuary by the world's largest river, the Amazon. In the context of ocean currents, a volume of one million cubic meters may be imagined as a "slice" of ocean with dimensions × × (width × length × thickness) or a cube with dimensions × × . At this scale, these units can be more easily compared in terms of width of the current (several km), depth (hundreds of meters), and current speed (as meters per second). Thus, a hypothetical current wide, (m) deep, and moving at would be transporting of water. The sverdrup is distinct from the SI siever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arabian Basin
The Arabian Basin is an oceanic basin located in the southern part of the Arabian Sea between the Arabian Peninsula and India. It is centered at 10° N, 65° E. The basin depth ranges from 3,400 m in the north to 4,400 m in the south, with a maximum depth of 4,652 m. The floor is covered by sediments from the Indus submarine fan and is relatively smooth. The southern enclosure of this basin is formed by the Central Indian Ridge, the Carlsberg Ridge and the Chagos-Laccadive Ridge. Bottom water enters the basin through the Owen fracture zone The Owen fracture zone (OFZ), though Misnomer, misnamed as a fracture zone, is a transform fault in the northwest Indian Ocean that separates the Arabian plate, Arabian and African plates from the Indian plate. Extending north-northeast from whe ... to the west. The Carlsberg Ridge, at a depth of 3,800 m, separates this basin from the Somali Basin to the southwest. The Arabian Basin is separated from the shal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Somali Basin
Horn of Africa * Somali Peninsula, a region of East Africa, also known as "The Horn of Africa" * Somalis, an inhabitant or ethnicity associated with Greater Somali Region ** Greater Somalia ** Somali language, a Cushitic language ** Somali culture ** Somali cuisine ** Proto-Somali, the ancestors of modern Somalis ** Somali, plural of Somalo, former Somali currency * Somali Plate, a tectonic plate which covers the eastern part of Africa *Somalia, a country in the Horn of Africa * Somaliland, an unrecognised state in the Horn of Africa, recognised internationally as de jure part of Somalia * Somali Region, a Somali-inhabited region of Ethiopia * North Eastern Province (Kenya), a Somali-inhabited region of Kenya Other uses * Somali, a member of the Somalia Battalion, a pro-Russian military group. * , a British destroyer * Somali cat, a cat breed * Somali, a character in the manga series '' Somali and the Forest Spirit'' See also * * * Proto-Somali Proto-Somalis were the ancien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indus River
The Indus ( ) is a transboundary river of Asia and a trans-Himalayas, Himalayan river of South Asia, South and Central Asia. The river rises in mountain springs northeast of Mount Kailash in the Western Tibet region of China, flows northwest through the disputed Kashmir region, first through the Indian-administered Ladakh, and then the Pakistani administered Gilgit Baltistan, Quote: "Kashmir, region of the northwestern Indian subcontinent. It is bounded by the Uygur Autonomous Region of Xinjiang to the northeast and the Tibet Autonomous Region to the east (both parts of China), by the Indian states of Himachal Pradesh and Punjab to the south, by Pakistan to the west, and by Afghanistan to the northwest. The northern and western portions are administered by Pakistan and comprise three areas: Azad Kashmir, Gilgit, and Baltistan, ... The southern and southeastern portions constitute the Indian state of Jammu and Kashmir. The Indian- and Pakistani-administered portions are divi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbidite
A turbidite is the geologic Deposition (geology), deposit of a turbidity current, which is a type of amalgamation of fluidal and sediment gravity flow responsible for distributing vast amounts of clastic sediment into the deep ocean. Sequencing Turbidites were first properly described by Arnold H. Bouma (1962), who studied deepwater sediments and recognized particular "fining-up intervals" within deep water, fine-grained shales, which were anomalous because they started at pebble Conglomerate (geology), conglomerates and terminated in shales. This was anomalous because within the deep ocean it had historically been assumed that there was no mechanism by which tractional flow could carry and deposit coarse-grained sediments into the abyssal depths. Bouma sequence, Bouma cycles begin with an erosional contact of a coarse lower bed of pebble to granule conglomerate in a sandy matrix, and grade up through coarse then medium plane parallel sandstone; through cross-bedded sandstone; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Dalrymple (K427)
HMS ''Dalrymple'' was a anti-aircraft frigate of the British Royal Navy, which served as a survey ship, mostly in the Persian Gulf, from 1948 until 1965. She was completed to deal with the large numbers of uncharted wrecks and mines around the British Isles as a result of World War II. For this purpose she was fitted for minesweeping. She was named for the pioneering Hydrographer of the Admiralty Alexander Dalrymple (1737–1808). Construction The ship was originally ordered from William Pickersgill & Sons Ltd. of Southwick, Sunderland, on 25 January 1943 as the ''Loch Glass''. However the contract was changed in 1944, and the ship was laid down as Admiralty Job Number 4795 on 29 April 1944 to a revised design as a Bay-class anti-aircraft frigate, and launched on 12 April 1945 as ''Luce Bay''. After launching the contract was terminated and the ship was towed to Devonport Dockyard for completion, but while fitting out it was decided to complete her as a survey ship. In Ja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Owen
HMS ''Owen'' was a frigate built for the Royal Navy during World War 2. Design and description ''Owen'' was converted into a survey vessel while still under construction. She displaced at standard load and at deep load. The ship had an overall length of , a beam of and a draught of .Chesneau, p. 61 She was powered by two vertical triple-expansion steam engines, each driving one shaft, using steam provided by two Admiralty three-drum boilers. The engines produced a total of and gave a maximum speed of . ''Owen'' carried a maximum of of fuel oil that gave her a range of at . The ship's complement was 133 officers and ratings.Lenton, p. 293 The survey ships were armed only with four 3-pounder saluting guns. Construction and career She was named for the explorer and naval officer William Fitzwilliam Owen. She was originally laid down as the vessel ''Loch Muick'', and re-ordered as ''Thurso Bay'' while building. She was completed as ''Owen'', modified for use as a survey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
