Pannotia is a hypothetical supercontinent that existed from about 600 to 540 million years ago. First described by Ian W.D. Diel (Ian WD Dalziel) in 1997.
Content
Formation
Pannotia began to form about 750 million years ago as a result of the division of the previous Rodinia supercontinent into Proto-Laurasia and Proto-Gondwana.
With the displacement of Proto-Laurasia to the South Pole, the partial turning of Proto-Gondwana and the introduction of the Congolese platform between them about 600 million years ago, Pannotia was formed. Since large continental masses were located around the poles, it is assumed that the extent of continental glaciation in the era of Pannotia was the highest in the entire geological history [1] .
Structure, existence and decay
In the period of closest approach, Pannotia was shaped like a letter V , open to the northeast, surrounding the Pan-Atlantic proto -ocean and surrounded by the Pan-African proto-ocean .
Pannotia's supercontinent was formed as a result of a tangential (tangential) contact of its constituent parts, which continued its movement, and was short-lived by geological measures. By the end of Precambrian, just 60 million years after its formation, Pannotia disintegrated into the continent of Gondwana and the mini-continents of the Baltic , Siberia and Lawrence . Subsequently, these continental masses were reunited again with the formation of the late supercontinent Pangea [2] .
See also
- Rodinia
- Pangea
- Canorland
- Vaalbara
Notes
- ↑ Precambrian Paleobiology . Virtual Fossil Museum . The appeal date is March 12, 2006. Archived August 15, 2012.
- ↑ Pannotia Neopr . UCMP Glossary . The appeal date is March 12, 2006. Archived August 8, 2012.