Gondwana

  • gondwana 420 million years ago. view centred on the south pole.

    gondwana ( ə/)[1] or gondwanaland[2] was a supercontinent that existed from the neoproterozoic (about 550 million years ago) until the jurassic (about 180 million years ago).

    it was formed by the accretion of several cratons. eventually, gondwana became the largest piece of continental crust of the paleozoic era, covering an area of about 100,000,000 km2 (39,000,000 sq mi),[3] about one-fifth of the earth's surface. during the carboniferous period, it merged with euramerica to form a larger supercontinent called pangaea. gondwana (and pangaea) gradually broke up during the mesozoic era. the remnants of gondwana make up about two-thirds of today's continental area, including south america, africa, antarctica, australia, indian subcontinent and arabia.

    the formation of gondwana began c. 800 to 650 ma with the 600 to 530 ma with the overlapping brasiliano and kuunga orogenies, the collision of south america with africa and the addition of australia and antarctica, respectively.[4]

  • origin of concept
  • formation
  • peri-gondwana development: paleozoic rifts and accretions
  • gondwana as part of pangaea: late paleozoic to early mesozoic
  • break-up
  • biogeography
  • see also
  • references
  • external links

Gondwana 420 million years ago. View centred on the South Pole.

Gondwana ( ə/)[1] or Gondwanaland[2] was a supercontinent that existed from the Neoproterozoic (about 550 million years ago) until the Jurassic (about 180 million years ago).

It was formed by the accretion of several cratons. Eventually, Gondwana became the largest piece of continental crust of the Paleozoic Era, covering an area of about 100,000,000 km2 (39,000,000 sq mi),[3] about one-fifth of the Earth's surface. During the Carboniferous Period, it merged with Euramerica to form a larger supercontinent called Pangaea. Gondwana (and Pangaea) gradually broke up during the Mesozoic Era. The remnants of Gondwana make up about two-thirds of today's continental area, including South America, Africa, Antarctica, Australia, Indian Subcontinent and Arabia.

The formation of Gondwana began c. 800 to 650 Ma with the 600 to 530 Ma with the overlapping Brasiliano and Kuunga orogenies, the collision of South America with Africa and the addition of Australia and Antarctica, respectively.[4]