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Panama Transform Fault
The Panama fracture zone is a major, active right lateral-moving transform fault and associated inactive fracture zone which forms part of the tectonic boundary between the Cocos plate and the Nazca plate, the Cocos–Nazca spreading centre. It is part of the triple junction between the Cocos plate, Nazca plate and Caribbean plate which is moving in the southeastern direction at 5.5 cm/yr. The active transform section runs from the Costa Rica Rise to the Middle America Trench The Middle America Trench is a major subduction zone, an oceanic trench in the eastern Pacific Ocean off the southwestern coast of Middle America, stretching from central Mexico to Costa Rica. The trench is 1,700 miles (2,750 km) long an .... References * * External links * Fracture zones Geology of Panama {{tectonics-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cocos Nazca Spreading Centre
Cocos may refer to: Geography * Cocos, Bahia, Brazil * Cocos, Quebradillas, Puerto Rico, a barrio * Cocos Island (other) ** Cocos (Keeling) Islands, a territory of Australia in the Indian Ocean *** Shire of Cocos, a local government area * Cocos Lagoon, south of Guam * Cocos Plate, a tectonic plate beneath the Pacific Ocean * rivers in Romania: ** Cocoș, a tributary of the Aita in Covasna County ** Cocoș (Constanța), a river in Constanța County ** Cocoș, a tributary of the Ilișoara Mare in Mureș County Biology * ''Cocos'' (plant), a plant genus with the coconut as its only accepted living species * ''Eoophyla cocos'', a moth of family Crambidae * ''Macrosporium cocos'', a fungus of family Pleosporaceae * ''Pseudoepicoccum cocos'', a fungus of family Incertae sedis People * Cocos Malays, an ethnic group inhabiting the Cocos (Keeling) Islands * Orang Cocos, an ethnic group in Malaysia descended from Cocos Malay immigrants * Roxana Cocoș (born 1989), Romanian we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transform Fault
A transform fault or transform boundary, is a fault (geology), fault along a plate boundary where the motion (physics), motion is predominantly Horizontal plane, horizontal. It ends abruptly where it connects to another plate boundary, either another transform, a spreading ridge, or a subduction, subduction zone. A transform fault is a special case of a ''strike-slip fault'' that also forms a plate boundary. Most such faults are found in oceanic crust, where they accommodate the lateral offset between segments of Divergent boundary, divergent boundaries, forming a zigzag pattern. This results from oblique seafloor spreading where the direction of motion is not perpendicular to the trend of the overall divergent boundary. A smaller number of such faults are found on land, although these are generally better-known, such as the San Andreas Fault and North Anatolian Fault. Nomenclature Transform boundaries are also known as conservative plate boundaries because they involve no addit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fracture Zone
A fracture zone is a linear feature on the ocean floor—often hundreds, even thousands of kilometers long—resulting from the action of offset mid-ocean ridge axis segments. They are a consequence of plate tectonics. Lithospheric plates on either side of an active transform fault move in opposite directions; here, strike-slip activity occurs. Fracture zones extend past the transform faults, away from the ridge axis; are usually seismically inactive (because both plate segments are moving in the same direction), although they can display evidence of transform fault activity, primarily in the different ages of the crust on opposite sides of the zone. In actual usage, many transform faults aligned with fracture zones are often loosely referred to as "fracture zones" although technically, they are not. They can be associated with other tectonic features and may be subducted or distorted by later tectonic activity. They are usually defined with bathymetric, gravity and magneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nazca Plate
The Nazca plate or Nasca plate, named after the Nazca region of southern Peru, is an oceanic list of tectonic plates, tectonic plate in the eastern Pacific Ocean basin off the west coast of South America. The ongoing subduction, along the Peru–Chile Trench, of the Nazca plate under the South American plate is largely responsible for the Andes, Andean orogeny. The Nazca plate is bounded on the west by the Pacific plate and to the south by the Antarctic plate through the East Pacific Rise and the Chile Rise, respectively. The movement of the Nazca plate over several Hotspot (geology), hotspots has created some volcanic islands as well as east–west running seamount chains that subduct under South America. Nazca is a relatively young plate in terms of the age of its rocks and its existence as an independent plate, having been formed from the breakup of the Farallon plate about 23 million years ago. The oldest rocks of the plate are about 50 million years old. Boundaries ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cocos–Nazca Spreading Centre
The Cocos–Nazca spreading centre (CNSC, Cocos–Nazca spreading system) is the divergent boundary between the Cocos and Nazca plates. It extends from close to the East Pacific Rise northwest of the Galápagos Islands, to the southeastern end of the Middle America Trench offshore Panama. The western part of this boundary is formed by the west–east Galápagos spreading centre, with the eastern part formed of two short spreading segments and three large transform segments, including the Panama fracture zone. Western CNSC The western part of the CNSC is formed by the Galápagos spreading centre (GSC). It extends for about and consists of a series of west-east trending spreading segments. Offsets between adjacent segments are marked by overlap without transform fault development, with exception of the highly oblique Galápagos transform. This structure is not thought to be a true transform fault, as it is not orthogonal to the spreading axes that it links. The GSC is divided i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triple Junction
A triple junction is the point where the boundaries of three tectonic plates meet. At the triple junction each of the three boundaries will be one of three types – a ridge (R), trench (T) or transform fault (F) – and triple junctions can be described according to the types of plate margin that meet at them (e.g. fault–fault–trench, ridge–ridge–ridge, or abbreviated F-F-T, R-R-R). Of the ten possible types of triple junctions only a few are stable through time (''stable'' in this context means that the geometrical configuration of the triple junction will not change through geologic time). The meeting of four or more plates is also theoretically possible, but junctions will only exist instantaneously. History The first scientific paper detailing the triple-junction concept was published in 1969 by Dan McKenzie and W. Jason Morgan. The term had traditionally been used for the intersection of three divergent boundaries or spreading ridges. These three divergent bounda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle America Trench
The Middle America Trench is a major subduction zone, an oceanic trench in the eastern Pacific Ocean off the southwestern coast of Middle America, stretching from central Mexico to Costa Rica. The trench is 1,700 miles (2,750 km) long and is 21,880 feet (6,669 m) at its deepest point. The trench is the boundary between the Rivera, Cocos, and Nazca plates on one side and the North American and Caribbean plates on the other. It is the 18th-deepest trench in the world. Many large earthquakes have occurred in the area of the Middle America Trench. Division The Middle America Trench can be divided into a northern and a southern section. The division, however, is not the same in its seaward side and its landward side. In the seaward side, the northern section, called the Acapulco Trench, runs from Jalisco Jalisco, officially the Free and Sovereign State of Jalisco, is one of the 31 states which, along with Mexico City, comprise the 32 Political divisions of Mexico, Fe ... [...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] |
