what is a craton - EAS

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    Craton - Wikipedia

    https://en.wikipedia.org/wiki/Craton

    A craton is an old and stable part of the continental lithosphere, which consists of Earth's two topmost layers, the crust and the uppermost mantle. Having often survived cycles of merging and rifting of continents, cratons are generally found in the interiors of tectonic plates; the exceptions occur

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    Terminology

    The term craton is used to distinguish the stable portion of the continental crust from regions that are more geologically active and unstable. Cratons can be described as shields, in which the basement rock crops out at the surface, and

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    Examples

    Examples of cratons are the Dharwar (or Karnataka) Craton in India, North China Craton, the East European Craton, the Amazonia Craton in South America, the Kaapvaal Craton

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    Structure

    Cratons have thick lithospheric roots. Mantle tomography shows that cratons are underlain by anomalously cold mantle corresponding to lithosphere more than twice the typical 100 km (60 mi) thickness of mature oceanic or non-cratonic, continental lithosphere.

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    Formation

    The process by which cratons were formed is called cratonization. There is much about this process that remains uncertain. However, the first cratonic landmasses likely formed during the Archean Eon. This is indicated by the age of

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    See also

    • List of shields and cratons
    • Cratonic sequence

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    Further reading

    • Dayton, Gene (2006). Geological Evolution of Australia. Sr. Lecturer, Geography, School of Humanities, Central Queensland University, Australia.
    • Grotzinger, John P.; Jordan, Thomas H.(4

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    Erosion

    The long-term erosion of cratons has been labelled the "cratonic regime". It involves processes of pediplanation and etchplanationthat

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  2. What is a craton: characteristics, importance and origin ...

    https://www.meteorologiaenred.com/en/craton...

    16/12/2021 · A craton is a larger structural unit of the earth's crust, made up of a large number of stable rocks, generally igneous and / or metamorphic rocks. Sometimes covered by small sediments. A typical craton is the Canadian Shield (Precambrian).

  4. What is a craton? How many are there? How do they relate ...

    https://ui.adsabs.harvard.edu/abs/2004AGUSM.T41C..01B

    01/05/2004 · What is a craton? A craton is a large, coherent domain of Earth's continental crust that has attained and maintained long-term stability, having undergone little internal deformation, except perhaps near its margins due to interaction with neighbouring terranes.

    • Tác giả: W. Bleeker, B. W. Davis
    • Thời gian đọc ước tính: 3 phút
    • Publish Year: 2004

  5. craton | geology | Britannica

    https://www.britannica.com/science/craton

    craton, the stable interior portion of a continent characteristically composed of ancient crystalline basement rock. The term craton is used to distinguish such regions from mobile geosynclinal troughs, which are linear belts of sediment accumulations subject to subsidence ( i.e., downwarping).

  6. What is a craton in geology? – SidmartinBio

    https://www.sidmartinbio.org/what-is-a-craton-in-geology

    11/12/2020 · Craton, the stable interior portion of a continent characteristically composed of ancient crystalline basement rock. The term craton is used to distinguish such regions from mobile geosynclinal troughs, which are linear belts of sediment accumulations subject to subsidence (i.e., downwarping ….

  7. what is a craton? - Lisbdnet.com

    https://lisbdnet.com/what-is-a-craton-2

    23/12/2021 · A craton is the oldest part of a continental plate. It is an old and stable part of the continental lithosphere. …. Cratons can be described as shields, in which the basement rock crops out at the surface, and platforms, in which the basement is overlain by sediments and sedimentary rock. See also what makes stars shine.

  8. what is a craton - Lisbdnet.com

    https://lisbdnet.com/what-is-a-craton

    19/12/2021 · A craton is the oldest part of a continental plate. It is an old and stable part of the continental lithosphere. …. Cratons can be described as shields, in which the basement rock crops out at the surface, and platforms, in which the basement is overlain by sediments and sedimentary rock.

  9. Craton - an overview | ScienceDirect Topics

    https://www.sciencedirect.com/topics/earth-and-planetary-sciences/craton

    Craton. Cratons are defined as “part of the crust which has attained stability and which has not been deformed for a long time” (Bates and Jackson, 1980), thus they are Precambrian in age (Kusky et al., 2007). From: Gondwana Research, 2013. Related terms: Subduction; Granite; Collision; Peridotite; Deformation; Terrane; Zircon; Orogenic Belt; Magmatism

  10. List of shields and cratons - Wikipedia

    https://en.wikipedia.org/wiki/List_of_shields_and_cratons

    A craton is an ancient part of the Earth's continental crust which has been more or less stable since Precambrian times. Cratons whose ancient rocks are widely exposed at the surface, often with relatively subdued relief, are known as shields. If the ancient rocks are largely overlain by a cover of younger rocks then the 'hidden' craton may be referred to as a platform.

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