Rodinia
Sign in to savethumb|Reconstruction of Rodinia at 900 million years ago, using modern images to illustrate where today's recognisable continents were at the time. Rodinia (from the Russian родина, rodina, meaning "motherland, birthplace") was a Mesoproterozoic and Neoproterozoic supercontinent that assembled 1.26–0.90 billion years ago (Ga) and broke up 750–633 million years ago (Ma). were probably the first to recognise a Precambrian supercontinent, which they named "Pangaea I". It was renamed "Rodinia" by , who also were the first to produce a plate reconstruction and propose a temporal framework for the s
AI overview
Rodinia was an ancient supercontinent that existed between roughly 1.26 billion and 633 million years ago, before breaking apart into the continents we recognize today. Scientists study Rodinia because understanding how this supercontinent formed and split apart helps explain the geological history of Earth and how the continents came to their present positions.
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Article
8 sectionsContents
- Geodynamics
- Paleogeographic reconstructions
- Breakup
- Influence on paleoclimate and life
- See also
- Notes
- References
- External links
thumb|Reconstruction of Rodinia at 900 million years ago, using modern images to illustrate where today's recognisable continents were at the time. Rodinia (from the Russian родина, rodina, meaning "motherland, birthplace") was a Mesoproterozoic and Neoproterozoic supercontinent that assembled 1.26–0.90 billion years ago (Ga) and broke up 750–633 million years ago (Ma). were probably the first to recognise a Precambrian supercontinent, which they named "Pangaea I". It was renamed "Rodinia" by , who also were the first to produce a plate reconstruction and propose a temporal framework for the supercontinent.
Rodinia formed at c. 1.23 Ga by accretion and collision of fragments produced by breakup of an older supercontinent, Columbia, assembled by global-scale 2.0–1.8 Ga collisional events. Rodinia broke up in the Neoproterozoic, with its continental fragments reassembled to form Pannotia 633–573 Ma. In contrast with Pannotia, little is known about Rodinia's configuration and geodynamic history. Paleomagnetic evidence provides some clues to the paleolatitude of individual pieces of the Earth's crust, but not to their longitude, which geologists have pieced together by comparing similar geologic features, often now widely dispersed.