FACTOID # 21: 15% of Army recruits from South Dakota are Native American, which is roughly the same percentage for female Army recruits in the state.
 
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Encyclopedia > African Plate
     The African plate, shown in pinkish-orange

The African Plate is a tectonic plate covering the continent of Africa and extending westward to the Mid-Atlantic Ridge. Image File history File links This is a lossless scalable vector image. ... Image File history File links This is a lossless scalable vector image. ... The tectonic plates of the world were mapped in the second half of the 20th century. ... Animated, colour-coded map showing the various continents. ... A world map showing the continent of Africa Africa is the worlds second-largest and second most-populous continent, after Asia. ... Courtesy USGS The ridge was central in the breakup of Pangaea that began some 180 million years ago. ...


The westerly side is a divergent boundary with the North American Plate to the north and the South American Plate to the south forming the central and southern part of the Mid-Atlantic Ridge. The araiban plate...HOLLY AND WHITNEY WERE HERE. The African plate is bounded on the northeast by the Arabian Plate, the southeast by the Indo-Australian Plate, the north by the Eurasian Plate, and the south by the Antarctic Plate. All of these boundaries are divergent or spreading boundaries with the exception of the northern boundary with the Eurasian Plate. In plate tectonics, a divergent boundary (divergent fault boundary or divergent plate boundary), (but also known as a constructive boundary or an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other. ...  The North American plate, shown in brown The North American Plate is a tectonic plate covering most of North America, extending eastward to the Mid-Atlantic Ridge and westward to the Cherskiy Range in East Siberia. ...  The South American plate, shown in purple The South American Plate is a tectonic plate covering the continent of South America and extending eastward to the Mid-Atlantic Ridge. ... Courtesy USGS The ridge was central in the breakup of Pangaea that began some 180 million years ago. ... The Arabian plate is shown in bright yellow on this map The Arabian Plate is a continental tectonic plate covering the Arabian peninsula and extending northward to Turkey. ...  The Indo-Australian plate, shown in dull orange The Indo-Australian Plate is an overarching name for two tectonic plates that include the continent of Australia and surrounding ocean extending northwest to include the Indian subcontinent and adjacent waters. ...  The Eurasian plate, shown in green The Eurasian Plate is a tectonic plate covering Eurasia (a landmass consisting of the traditional continents of Europe and Asia) except that it does not cover the Indian subcontinent, the Arabian subcontinent, and the area east of the Verkhoyansk Range in East Siberia. ... 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 African Plate comprises several continental blocks or cratons, stable continental blocks of old rocks, which came together to form the African continent during the assembly of the supercontinent Gondwana around 550 million years ago. These cratons are, from south to north, the Kalahari, Congo, Sahara and West African craton. Each of these cratons can further be subdivided into even smaller blocks or terranes, sutured along pre-Gondwanan orogenic belts. World geologic provinces. ... In geology, a supercontinent is a land mass comprising more than one continental core, or craton. ... For other uses of Gondwana and Gondwanaland, see Gondwana (disambiguation). ... The Kalahari craton occupies a large portion of South Africa and consists of the Kaapvaal, the Zimbabwe craton, the Limpopo belt, and the Namaqua Belt. ... A terrane in paleogeography is an accretion that has collided with a continental nucleus, or craton but can be recognized by the foreign origin of its rock strata. ... In geology, orogeny is the process of mountain building. ...

Map of East Africa showing some of the historically active volcanoes(red triangles) and the Afar Triangle (shaded, center) -- a triple junction where three plates are pulling away from one another: the Arabian Plate, and the two parts of the African Plate (the Nubian and the Somalian) splitting along the East African Rift Zone (USGS).

The African Plate is rifting in the eastern interior along the tectonically and volcanically active Afar Triangle and Great Rift Valley. This rift zone separates the Nubian subplate to the west from the Somalian subplate to the east. A mantle plume is proposed to exist beneath the Afar region. Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... A triple junction is the point where three tectonic plates diverge. ... It has been suggested that this article or section be merged with Rift valley. ... This article is about volcanoes in geology. ... This page is a candidate for speedy deletion. ... Northern section of the Great Rift Valley. ... A lava lamp illustrates the basic concept of a mantle plume. ...


The African Plate's speed is estimated at around 2.15 centimeters per year. At this rate the continent of Africa should touch the southern tip of Spain in about 650,000 years, closing the Mediterranean Sea. This article is being considered for deletion in accordance with Wikipedias deletion policy. ... Mediterranean redirects here. ...


The New England hotspot in the Atlantic Ocean has probably created a short line of mid to late-Tertiary age seamounts on the African Plate but appears to be currently inactive.[1] The New England hotspot is marked 28 on map. ... Tertiary geological time interval covers roughly the time span between the demise of the non-avian dinosaurs and beginning of the most recent Ice Age, approximately 65 million to 1. ... A seamount is a mountain rising from the ocean seafloor that does not reach to the waters surface (sea level), and thus is not an island. ...


References

  1. ^ Age Progressive Volcanism in the New England Seamounts and the opening of the Central Atlantic Ocean Retrieved on 2007-10-05

Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... For other uses, see 5th October (Serbia). ...

External links

  • USGS - Understanding plate motions
  • The geodynamics of the North-American/Eurasian/African plate boundaries
  • Cenozoic dynamics of the African plate with emphasis on the Africa-Eurasia collision
  • Speed of the Continental Plates

  Results from FactBites:
 
Continental Drift and Tectonic Plates (1448 words)
Plate tectonic theory arose out of two separate geological observations: continental drift, noticed in the early 20th century, and seafloor spreading, noticed in the 1960s.
The key principle of plate tectonics is that the lithosphere exists as separate and distinct tectonic plates, which "float" on the fluid-like asthenosphere.
Tectonic plates are comprised of two types of lithosphere: continental and oceanic lithospheres; for example, the African Plate includes the continent and parts of the floor of the Atlantic and Indian Oceans.
  More results at FactBites »

 
 

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