Calibrating Rates of Early Cambrian Evolution

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Calibrating Rates of Early Cambrian Evolution

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dc.contributor.author Bowring, Samuel A.
dc.contributor.author Kolosov, Peter
dc.contributor.author Grotzinger, John P.
dc.contributor.author Isachsen, Clark E.
dc.contributor.author Pelechaty, Shane M.
dc.contributor.author Knoll, Andrew
dc.date.accessioned 2009-07-15T13:26:41Z
dc.date.issued 1993
dc.identifier.citation Bowring, Samuel A., John P. Grotzinger, Clark E. Isachsen, Andrew H. Knoll, Shane M. Pelechaty, and Peter Kolosov. 1993. Calibrating rates of early Cambrian evolution. Science 261(5126): 1293-1298. en
dc.identifier.issn 0193-4511 en
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:3190366
dc.description.abstract An explosive episode of biological diversification occurred near the beginning of the Cambrian period. Evolutionary rates in the Cambrian have been difficult to quantify accurately because of a lack of high-precision ages. Currently, uranium-lead zircon geochronology is the most powerful method for dating rocks of Cambrian age. Uranium-lead zircon data from lower Cambrian rocks located in northeast Siberia indicate that the Cambrian period began at approximately 544 million years ago and that its oldest (Manykaian) stage lasted no less than 10 million years. Other data indicate that the Tommotian and Atdabanian stages together lasted only 5 to 10 million years. The resulting compression of Early Cambrian time accentuates the rapidity of both the faunal diversification and subsequent Cambrian turnover. en
dc.description.sponsorship Organismic and Evolutionary Biology en
dc.language.iso en_US en
dc.publisher American Association for the Advancement of Science en
dc.relation.isversionof http://dx.doi.org/10.1126/science.11539488 en
dash.license META_ONLY
dc.title Calibrating Rates of Early Cambrian Evolution en
dc.relation.journal Science en
dash.depositing.author Knoll, Andrew
dash.embargo.until 10000-01-01

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  • FAS Scholarly Articles [7594]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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