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What is Rodinia How did it form?

What is Rodinia How did it form?

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 million years ago.

What did Rodinia consist of?

The Rodinia Supercontinent is the ancestral supercontinent which was assembled during the Meso-Proterozoic from about 1600 to 1000 Ma. Available evidence suggests that it was composed of about twenty identifiable Archaean and Palaeo-Proterozoic cratons.

What is the definition supercontinent?

Definition of supercontinent : a hypothetical former large continent from which other continents are held to have broken off and drifted away.

What continent came after Rodinia?

About 100 million years after Rodinia split in two, the supercontinent, Pannotia came together while most land was located at the Earth’s poles in glacier form. Two oceans, the Panthalassa and Pan-African, formed and later merged into one.

Which came first Rodinia and Pangea?

Pangaea broke up about 250 million years ago and Rodinia about 760 million years ago. In between these two, some authors place another, Pannotia, which they say broke up at 550 million. Personally I have no truck with Pannotia. Rodinia is thought to have assembled at 1.1 billion years.

When did Rodinia break up?

about 0.75 billion years ago
Each supercontinent has its quirks, but one, called Rodinia, assembled from 1.3 to 0.9 billion years ago and broken up about 0.75 billion years ago, is particularly odd.

What is an example of supercontinent?

Gondwana and Laurasia were supercontinents. A massive formation of land, as Pangea, that existed for some period of time in geologic history. Other supercontinents are hypothesized to have formed and broken apart earlier in geologic time.

What does rodrodinia mean?

Rodinia (from the Russian родина, rodina, meaning “motherland, birthplace”) was a Neoproterozoic supercontinent that assembled 1.1–0.9 billion years ago and broke up 750–633 million years ago. Valentine & Moores 1970 were probably the first to recognise a Precambrian supercontinent, which they named ‘Pangaea I’.

What is the Rodinia model?

According to J.D.A. Piper, Rodinia is one of two models for the configuration and history of the continental crust in the latter part of Precambrian times. The other is Paleopangea, Piper’s own concept.

What was the paleogeography like before the formation of Rodinia?

Little is known about the paleogeography before the formation of Rodinia. Paleomagnetic and geologic data are only definite enough to form reconstructions from the breakup of Rodinia onwards. Rodinia is considered to have formed between 1.3 and 1.23 billion years ago and broke up again before 750 million years ago.

Is Rodinia a supercontinent?

“The Proterozoic supercontinent Rodinia: paleomagnetically derived reconstructions for 1100 to 800 Ma”. Earth and Planetary Science Letters. 154 (1): 13–24. Bibcode: 1998E&PSL.154…13W. doi: 10.1016/S0012-821X (97)00127-1.