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Description:

The Tommotian Age began about 530 million years ago and is a subdivision of the early Cambrian. Named for rock exposures in Siberia, the Tommotian saw the first major radiation of the animals, or metazoans, including the first appearance of a great many mineralized taxa such as brachiopods, trilobites, archaeocyathids, molluscs, and echinoderms. A few million years before the Tommotian, in the Vendian, the continents had been joined in a single supercontinent called Rodinia. As the Cambrian began, Rodinia began to fragment into smaller continents which did not always correspond to the ones we see today. This site contains a map with a reconstruction that shows the rifting of Rodinia. There is also information about the climate as well as the location of some present day land masses at that time.

Subjects:

  • Science > General

Education Levels:

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Keywords:

NSDL,Undergraduate (Lower Division),NSDL_SetSpec_dlese.org,Space Science,Physical sciences,Graduate/Professional,History of science,Geology,Life Science,Astronomy,Informal Education,Higher Education,Science,oai:nsdl.org:2200/20061003230947855T,Natural history,History/Policy/Law,Chemistry,Physics,Geologic time,Paleontology,High School,Earth science,Geoscience,Space sciences

Language:

English

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Public - Available to anyone

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