Примери за използване на Island arcs на Английски и техните преводи на Български
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These island arcs may be added to a continental margin during an accretionary orogeny.
Movement between two lithospheric plates explains the major features of active island arcs.
Island arcs can either be active or inactive based on their seismicity and presence of volcanoes.
The Pacific Plate is subducting under the Australian Plate, which forms the Tonga and Kermadec Trenches, andthe parallel Tonga and Kermadec island arcs.
Most island arcs originate on oceanic crust and have resulted from the descent of the lithosphere into the mantle along the subduction zone….
Iron depletion is most pronounced at continental arcs, where the crust is thick, andmuch less so in island arcs, where the crust is thin.
Most modern island arcs are near the continental margins(majorly in the northern and western margins of the Pacific Ocean).
Before each of these ice ages, new research finds,collisions between continents and island arcs built long chains of mountains in the tropical latitudes.
Island arcs are long chains of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries.
The Pacific Plate is subducting under the Australian Plate, which forms the Tonga and Kermadec Trenches, andthe parallel Tonga and Kermadec island arcs.
The movement of the island arcs towards the continent could be possible if, at some point, the ancient Benioff zones dipped toward the present ocean rather than toward the continent, as in most arcs today.
These types of eruptions are common on volcanic islands and at places where the magma has a particularly mafic,specifically basaltic, composition such as oceanic island arcs and on ocean islands near hotspots.
However, their volcanic history,which indicates that they are fragments of older island arcs, is not necessarily related to the present plate pattern and may be due to differences in position of plate margins in the past.
The fracture zones in which some active island arcs terminate may be interpreted in terms of plate tectonics as resulting from movement along transform faults,[4][5] which are plate margins where the crust is neither being consumed nor generated.
The presence of a trench andindications of subduction beneath the Pacific Plate is suggestive but the absence of island arcs, which could be expected from substantial subduction in the past, makes the development along this boundary unclear.
Along the Pacific's northern and western periphery, from the Alaska Peninsula to New Zealand,stretches a system of marginal sea basins, island arcs, and deep-sea trenches, encompassing the region of the Australian and Asian seas and together forming a geosynclinal belt.
On the subducting side of the island arc is a deep and narrow oceanic trench, which is the trace at the Earth's surface of the boundary between the down-going and overriding plates.
Multiple earthquakes occur along this subduction boundary with the seismic hypocenters located at increasing depth under the island arc: these quakes define the Benioff zone.[10][11].
The subduction formed the Lesser Antilles island arc, a curved chain of volcanoes approximately 850 kilometres(530 mi) in length, between Puerto Rico and Venezuela, where the Caribbean Plate meets Atlantic oceanic crust belonging to the South American Plate.
The Aleutian Islands of Alaska are an example of an island arc.
Two plates collide and create an island arc between them in the process.
Hotspot volcanoes are considered to have a fundamentally different origin from island arc volcanoes.
The Aleutian Peninsula in Alaska is an example of this type of island arc.
The Bauers Ridge exposes outcrops of diorites which,along with bow-shaped configurations, connects it to the Aleutian Island arc.
Geologists attribute the arcuate structure to the rigidity of the descending plate, and island arc cusps relate to tears in the descending lithosphere.
The Nicobar Islands are part of a great island arc created by the collision of the Indo-Australian Plate with Eurasia.
The Nicobar Islands are part of a great island arc that is created by the collision of the Indo-Australian Plate with Eurasia.
The volcanic island of Nishi-no-shima(Rosario Island) lies 584 miles southeast of Tokyo and forms part of the Volcanic Islands arc.
Earth's surface was probably broken up into many small plates with volcanic islands and arcs in great abundance.