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chemical fossil
chemical fossil Any of various organic compounds found in ancient geological strata that appear to be biological in origin and are assumed to indicate that life existed when the rocks were formed. The presence of chemical fossils in Archaean strata indicates that life existed over 3500 million years ago, perhaps even as much as 3800 million years ago.
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"chemical fossil." A Dictionary of Biology. 2004. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>. "chemical fossil." A Dictionary of Biology. 2004. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O6-chemicalfossil.html "chemical fossil." A Dictionary of Biology. 2004. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-chemicalfossil.html |
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chemical fossils
chemical fossils see biomarkers (chemical fossils)
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Cite this article
PAUL HANCOCK and BRIAN J. SKINNER. "chemical fossils." The Oxford Companion to the Earth. 2000. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>. PAUL HANCOCK and BRIAN J. SKINNER. "chemical fossils." The Oxford Companion to the Earth. 2000. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O112-chemicalfossils.html PAUL HANCOCK and BRIAN J. SKINNER. "chemical fossils." The Oxford Companion to the Earth. 2000. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O112-chemicalfossils.html |
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