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Encyclopedia > Scotia Plate
██ The Scotia plate, shown in blue-green towards the bottom of the map
██ The Scotia plate, shown in blue-green towards the bottom of the map

The Scotia Plate is an oceanic tectonic plate bordering the South American Plate on the north, the South Sandwich microplate to the east, and the Antarctic Plate on the south and west. Image File history File links Download high resolution version (4150x2832, 3128 KB) The Earths tectonic plates. ... Image File history File links Download high resolution version (4150x2832, 3128 KB) The Earths tectonic plates. ... The tectonic plates of the world were mapped in the second half of the 20th century. ... The South American Plate is a continental tectonic plate covering the continent of South America and extending eastward to the Mid-Atlantic Ridge. ... South Georgia and the South Sandwich Islands is an overseas territory of the United Kingdom, also claimed by Argentina. ... The Antarctic plate is shown in blue on this map The Antarctic Plate is a continental tectonic plate covering the continent of Antarctica and extending outward under the surrounding oceans. ...


The north and south boundaries of the plate are transform fault boundaries. At the eastern margin the Scotia has a spreading boundary between it and the small Sandwich plate. The South Sandwich microplate is subducting in the east under the ocean floor on the South American Plate, which is thought to have brought about its separation from the Scotia Plate, starting as backarc spreading. The western boundary with the Antarctic plate is a complex and rather ill-defined boundary. A transform fault is a geological fault that is a special case of strike-slip faulting which terminates abruptly, at both ends, at a major transverse geological feature. ... A mid-ocean ridge or mid-oceanic ridge is an uplifting of the ocean floor that occurs when convection currents beneath the ocean bed force magma up where two tectonic plates meet at a divergent boundary. ... The South American Plate is a continental tectonic plate covering the continent of South America and extending eastward to the Mid-Atlantic Ridge. ... Back-arc basins (or retro-arc basins) are geologic features, submarine basins associated with island arcs and subduction zones. ...


There is some speculation that the westward motion of the South American Plate may have forced the Caribbean and Scotia Plates at its northern and southern ends respectively to squeeze around it. Both share a similar shape and are being subducted along their eastern boundary.[1] Detail of tectonic plates from: Tectonic plates of the world. ...


References

  • South Sandwich microplate
  • Motion of Scotia plate

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