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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
The 2.1 Ga old Francevillian biota: Biogenicity, taphonomy and biodiversity
PLoS ONE, Volume 9, No. 6, Article e99438, Year 2014
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Description
The Paleoproterozoic Era witnessed crucial steps in the evolution of Earth's surface environments following the first appreciable rise of free atmospheric oxygen concentrations ∼2.3 to 2.1 Ga ago, and concomitant shallow ocean oxygenation. While most sedimentary successions deposited during this time interval have experienced thermal overprinting from burial diagenesis and metamorphism, the ca. 2.1 Ga black shales of the Francevillian B Formation (FB2) cropping out in southeastern Gabon have not. The Francevillian Formation contains centimeter-sized structures interpreted as organized and spatially discrete populations of colonial organisms living in an oxygenated marine ecosystem. Here, new material from the FB2 black shales is presented and analyzed to further explore its biogenicity and taphonomy. Our extended record comprises variably sized, shaped, and structured pyritized macrofossils of lobate, elongated, and rodshaped morphologies as well as abundant non-pyritized disk-shaped macrofossils and organic-walled acritarchs. Combined microtomography, geochemistry, and sedimentary analysis suggest a biota fossilized during early diagenesis. The emergence of this biota follows a rise in atmospheric oxygen, which is consistent with the idea that surface oxygenation allowed the evolution and ecological expansion of complex megascopic life. © 2014 El Albani et al.
Available Materials
https://efashare.b-cdn.net/share/pmc/articles/PMC4070892/bin/pone.0099438.s001.xlsx
https://efashare.b-cdn.net/share/pmc/articles/PMC4070892/bin/pone.0099438.s002.pdf
https://efashare.b-cdn.net/share/pmc/articles/PMC4070892/bin/pone.0099438.s003.pdf
Authors & Co-Authors
El-Albani, Abderrazak
France, Paris
Insu - Institut National Des Sciences de L'univers
BENGTSON, STEFAN
Sweden, Stockholm
Naturhistoriska Riksmuseet
Canfield, Donald Eugene
Denmark, Odense
Syddansk Universitet
Riboulleau, Armelle
France, Lille
Université de Lille
Bard, Claire Rollion
France, Paris
Cnrs Centre National de la Recherche Scientifique
Macchiarelli, Roberto M.
France, Poitiers
Universite de Poitiers
France, Paris
Museum National D'histoire Naturelle
Pemba, Lauriss Ngombi
France, Paris
Insu - Institut National Des Sciences de L'univers
Hammarlund, Emma U.
Sweden, Stockholm
Naturhistoriska Riksmuseet
Denmark, Odense
Syddansk Universitet
Meunier, Alain
France, Paris
Insu - Institut National Des Sciences de L'univers
Mouélé, Idalina Moubiya
France, Paris
Insu - Institut National Des Sciences de L'univers
Benzerara, Karim
France, Paris
Sorbonne Université
Bernard, Sylvain
France, Paris
Sorbonne Université
Boulvais, Philippe
France, Rennes
Géosciences Rennes
Chaussidon, Marc
France, Paris
Cnrs Centre National de la Recherche Scientifique
Cesari, Christian
France, Paris
Cnrs Centre National de la Recherche Scientifique
Fontaine, Claude
France, Paris
Insu - Institut National Des Sciences de L'univers
Chi-Fru, Ernest
Sweden, Stockholm
Stockholms Universitet
Ruiz, Juan Manuel Garcia
Spain, Armilla
Csic-ugr - Instituto Andaluz de Ciencias de la Tierra Iact
Gauthier-Lafaye, François F.
France, Strasbourg
Institut Terre et Environnement de Strasbourg Ites
Mazurier, Arnaud
France, Poitiers
Société Etudes Recherches Matériaux
Pierson-Wickmann, Anne-Catherine Catherine
France, Rennes
Géosciences Rennes
Rouxel, Olivier J.
France, Plouzane
Ifremer Institut Francais de Recherche Pour L'exploitation de la Mer
Trentesaux, Alain
France, Lille
Université de Lille
Vecoli, Marco
France, Lille
Université de Lille
Versteegh, Gerard J.M.
Germany, Bremen
Marum – Zentrum Für Marine Umweltwissenschaften
White, Lee
Gabon, Libreville
Agence Nationale Des Parcs Nationaux
Whitehouse, Martin J.
Sweden, Stockholm
Naturhistoriska Riksmuseet
Bekker, Andrey Yu
United States, Riverside
University of California, Riverside
Statistics
Citations: 95
Authors: 28
Affiliations: 17
Identifiers
Doi:
10.1371/journal.pone.0099438
e-ISSN:
19326203
Study Locations
Gabon