Archean molecular fossils and the early rise of eukaryotes

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dc.contributor.authorBrocks, Jochen
dc.contributor.authorLogan, Graham A
dc.contributor.authorBuick, Roger
dc.contributor.authorSummons, Roger
dc.date.accessioned2016-06-14T23:21:07Z
dc.date.issued1999
dc.date.updated2016-06-14T08:59:53Z
dc.description.abstractMolecular fossils of biological lipids are preserved in 2700-million- year-old shales from the Pilbara Craton, Australia. Sequential extraction of adjacent samples shows that these hydrocarbon biomarkers are indigenous and syngenetic to the Archean shales, greatly extending the known geological range of such molecules. The presence of abundant 2α-methylhopanes, which are characteristic of cyanobacteria, indicates that oxygenic photosynthesis evolved well before the atmosphere became oxidizing. The presence of steranes, particularly cholestane and its 28- to 30-carbon analogs, provides persuasive evidence for the existence of eukaryotes 500 million to 1 billion years before the extant fossil record indicates that the lineage arose.
dc.identifier.issn0036-8075
dc.identifier.urihttp://hdl.handle.net/1885/103723
dc.publisherAmerican Association for the Advancement of Science
dc.sourceScience
dc.subjectKeywords: cholestane derivative; lipid; Archean; biomarker; eukaryote; fossil; lipid; article; Australia; cyanobacterium; eukaryote; fossil; geology; molecular evolution; nonhuman; photosynthesis; priority journal; Atmosphere; Australia; Biological Markers; Cholest
dc.titleArchean molecular fossils and the early rise of eukaryotes
dc.typeJournal article
local.bibliographicCitation.issue5430
local.bibliographicCitation.lastpage1036
local.bibliographicCitation.startpage1033
local.contributor.affiliationBrocks, Jochen, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLogan, Graham A, Geoscience Australia
local.contributor.affiliationBuick, Roger, University of Washington
local.contributor.affiliationSummons, Roger, Macquarie University
local.contributor.authoremailu4240521@anu.edu.au
local.contributor.authoruidBrocks, Jochen, u4240521
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040204 - Organic Geochemistry
local.identifier.absfor060206 - Palaeoecology
local.identifier.ariespublicationu4240521xPUB11
local.identifier.citationvolume285
local.identifier.doi10.1126/science.285.5430.1033
local.identifier.scopusID2-s2.0-0033551919
local.identifier.uidSubmittedByu4240521
local.type.statusPublished Version

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