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Angaran Shield

geological region, Asia

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characteristics of continental shields

  • In continental shield

    In Asia the name Angaran Shield is applied to a large stable block bounded by the Lena and Yenisey rivers on the east and west and by the Arctic Ocean and Lake Baikal to the north and south. An area in China and North Korea is sometimes designated the…

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physiography of Arctic

  • Arctic Ocean
    In Arctic: Geology

    The Angaran Shield is exposed between the Khatanga and Lena rivers in north-central Siberia and the Aldan Shield is exposed in eastern Siberia.

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Indian Platform, Precambrian continental shield, one of four around which the Asian continent coalesced. Five areas of geosynclinal folding constitute the platform basement; from oldest to youngest, these are the Dharwar, Aravalli (see Aravalli Range), Eastern Ghat (see Ghats), Satpura (see Satpura Range), and Delhi foldings. After the consolidation of the basement in Proterozoic times (between 2.5 billion and 542 million years ago), the evolution of the platform comprises six major tectonic-stratigraphic sequences—that which produced the rocks of the Cuddapah Group and those of the Vindhyan (see Vindhya Range), Gondwana, Mesozoic, Paleogene, and Neogene sequences.

This article was most recently revised and updated by John P. Rafferty.